[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]
Total natural gas vehicle sales in US down 6.5% in 2014 due to 34% drop in light-duty sales; medium- and heavy-duty up
March 29, 2015
In 2014, light-, medium-, and heavy-duty natural gas vehicle (NGV) production/sales in the US totaled just over 18,000 vehicles, down 6.5% from 2013, according to NGVAmerica’s 2014 NGV Production/Sales Report. The report is based on the organization’s annual survey of OEMs and approved aftermarket suppliers.
The heavy-duty market segment grew at a healthy pace, up 30% over 2013. The medium-duty market segment also grew steadily, up 24% over 2013. The light-duty segment fell 34% from 2013, mostly related to a drop in orders from the gas and oil exploration and production (E&P) sector.
BLM issues final rule for fracking on public lands; new rule on deepsea blowout preventers coming
March 22, 2015
The US Department of the Interior Bureau of Land Management (BLM) has released final rule covering hydraulic fracturing on public and American Indian lands. As of 30 June 2014, there were approximately 47,000 active oil and gas leases on public lands, and approximately 95,000 oil and gas wells. Of wells currently being drilled, more than 90% use hydraulic fracturing. This final rule will supplement the existing requirements, which will remain in place. The rule applies only to development on public and tribal lands—which represent about 25% of US unconventional oil and gas—and includes a process so that states and tribes may request variances from provisions for which they have an equal or more protective regulation in place.
The Department will also propose a rule in the coming weeks that raises the bar on blowout preventers for offshore wells and well control measures based on technological progress advanced by industry, said Secretary of the Interior Sally Jewell during her remarks at the Center for Strategic and International Studies (CSIS) several days prior to the release of the fracking rule. Other reforms will also include important measures to target where oil and gas leasing occurs and protect sensitive areas that are too special to drill.
Study: natural gas heavy-duty trucking fleet could benefit economy, but has mixed environmental effects
February 20, 2015
Switching from diesel fuel to natural gas may hold advantages for the US heavy-duty trucking fleet, but more needs to be done to reach the full environmental benefits, according to a new white paper released by the Institute of Transportation Studies at the University of California, Davis, and Rice University.
The recent shale-driven emergence of natural gas as an abundant, inexpensive fuel in the US has raised the possibility of a “momentous shift” in the level of natural gas used in transportation. The cost advantage of natural gas over diesel fuel is particularly appealing for vehicles with a high intensity of travel and thus fuel use. In the paper, the team investigated the possibility that natural gas could be utilized to provide fuel cost savings, geographic supply diversity and environmental benefits for the heavy-duty trucking sector—and whether it can enable a transition to lower carbon transport fuels.
DOE workshop report on common opportunities and challenges in expanding use of H2 and natural gas vehicles
|Hydrogen and natural gas share a number of common entry to market barriers. Image from DOE EERE Fuel Cell Technologies Office. Click to enlarge.|
Sandia National Laboratories, supported by the DOE’s Vehicle Technologies and Fuel Cell Technologies Offices, recently released the workshop report “Transitioning the Transportation Sector: Exploring the Intersection of Hydrogen Fuel Cell and Natural Gas Vehicles.”
Held in September 2014, the workshop considered common opportunities and challenges in expanding the use of hydrogen and natural gas as transportation fuels. Organized by Sandia, the American Gas Association, and Toyota, the workshop included participants from the auto industry, freight delivery fleets, gas suppliers, gas storage developers, utilities, academia, industry associations, national laboratories, and federal and state governments.
New black silicon-supported catalyst for photoreduction of CO2 to methane
February 16, 2015
Researchers at the University of Toronto have developed a catalyst comprising of black silicon nanowire supported ruthenium ( Ru/SiNW) for the photochemical and thermochemical reduction of gaseous CO2 to methane (methanation) in the presence of hydrogen under solar-simulated light. An open access paper on their work is published in the new journal Advanced Science.
The Ru/SiNW catalysts activated the Sabatier reaction at a rate of 0.74 mmol g−1 h−1 under 14.5 suns intensity of solar-simulated irradiation in a hydrogen atmosphere at 15 psi and a H2:CO2 ratio of 4:1. The team suggested that much higher reaction rates could be achieved by optimizing the dispersion of the Ru over the SiNW support.
ICCT reviews real-world tractor-trailer fuel economy in US, China and Europe
February 15, 2015
The International Council on Clean Transportation (ICCT) has published a new paper reviewing and summarizing data on commercial vehicle sales and real-world fuel consumption for heavy-duty tractor-trailers in the three key markets of the US, China and Europe, which together account for more than 70% of HDV sales worldwide.
The review found that in the US, average tractor-trailer fuel consumption rates for the entire fleet are approximately 39 L/100 km (6 mpg). For the newest US models, fuel consumption is typically between 33 and 36 L/100 km (6.5–7 mpg). A fleet-wide analysis done for the European Commission estimates tractor-trailer fuel consumption at roughly 31 L/100 km (7.6 mpg), while tests of individual vehicles done by trucking magazines suggest somewhat higher average rates of consumption at approximately 36 to 38 L/100 km (6.5 to 6.2 mpg). Chassis dynamometer testing performed as part of the regulatory development process in China reveals that tractor-trailers seem to have much higher fuel consumption rates, on average, than in the US and the EU, with laboratory results yielding an average of 44 L/100 km (5.4 mpg).
Extensive materials genome modeling study suggests best adsosrbent materials for natural gas storage already designed; 70% of ARPA-E target
February 03, 2015
Using a materials genome approach, a collaboration between EPFL, the University of California at Berkeley, Rice University, the Georgia Institute of Technology, Northwestern University, Lawrence Berkeley National Laboratory, and the Korea Advanced Institute of Science and Technology has searched for high-performance adsorbent materials to store natural gas in a vehicular fuel tank.
In their study, published in the RSC journal Energy & Environmental Science, they simulated more than 650,000 designs for nanoporous materials. They found that the best candidates for natural gas storage have already been designed—but that those best materials meet only 70% of the Advanced Research Projects Agency - Energy (ARPA-E) targets for natural gas storage on vehicles. (Earlier post.)
Researchers ID structure of key intermediate in enzyme converting methane to methanol; potential for synthetic fuels
January 26, 2015
A team from the University of Minnesota and Michigan State University has identified the structure of the key intermediate “Q” in the enzyme methane monooxygenase (MMO). MMO catalyzes the O2-dependent conversion of methane to methanol in methanotrophic bacteria, thereby preventing the emission into the atmosphere of approximately one billion tons of this potent greenhouse gas annually.
Q is one of the most powerful oxidizing intermediates occurring in nature. Exploiting this extreme oxidizing potential is of great interest for bioremediation and the development of synthetic approaches to methane-based alternative fuels and chemical industry feedstocks, the authors noted in their paper, published in the journal Nature. The insight gained into the formation and reactivity of Q from the structure reported is an important step towards harnessing this potential, the authors suggested.
Obama Administration recommends designating most of Arctic National Wildlife Refuge as Wilderness
On Sunday, the US Fish and Wildlife Service (FWS) released its revised proposed comprehensive conservation plan and final environmental impact statement (EIS) for the 19.64-million acre Arctic National Wildlife Refuge.
The FWS’ preferred alternative recommends an additional 12.28 million acres—including the Coastal Plain—for designation as “Wilderness”. (“Wilderness” (with a capital “W”) refers to designated Wilderness areas, with accompanying restrictions.) The FWS also recommends four rivers—the Atigun, Hulahula, Kongakut, and Marsh Fork Canning—for inclusion into the National Wild and Scenic Rivers System. Currently, more than 7 million acres of the refuge are managed as Wilderness. However, more than 60% of the refuge—including the Coastal Plain—does not carry that designation. Implementation of the preferred alternative would change that.
China Yuchai LNG engine powers the “Fuel Efficient Heavy-Duty Truck of the Year 2014” in China
China Yuchai International announced that a “K-Gold” model C&C truck equipped with the YC6K1340N liquid natural gas (LNG) engine has won the “Fuel Efficient Heavy-Duty Truck of the Year 2014” at China’s largest annual commercial vehicle event.
At 13 liters, the YC6K1340N engine has the largest displacement and highest torque power among comparable natural gas engines in China. Variants in the K13N range span power ratings from 340-440 PS (250-324 kW, 335-434 hp), with 1950 N·m of torque at 1200 ~ 1500 rpm. By utilizing lean-burn technology, it reduces average energy consumption by approximately 25% compared with diesel engines of similar size and power. The model YC6K1340N is the only engine in China that utilizes the JACOBS in-cylinder brake technology, and has LNG braking power up to 17 kW/L.
California approves another $18M for clean energy projects; $12M for alternative vehicles
January 15, 2015
The California Energy Commission approved nearly $18 million to fund projects that will help the state meet its climate and energy goals. Twelve million dollars will go toward three alternative fuel projects, $4 million will help fund two geothermal projects and $3.5 million will help fund local energy efficiency projects.
The three alternative fuels projects will receive funding through the Alternative and Renewable Fuel and Vehicle Technology Program (ARFVTP), which supports technologies that reduce greenhouse gas emissions and dependence on petroleum-based fuels. Recipients include:
Navigant forecasts LD natural gas vehicles to account for 2.8% of global vehicle parc by 2024
December 31, 2014
|Cumulative light-duty NGV sales by segment. Source: Navigant. Click to enlarge.|
In a new report, Navigant Research forecasts that light-duty natural gas vehicle (LD NGV) sales will grow 119% between 2014 and 2024, culminating in 42.1 million NGVs on the world’s roads and accounting for 2.8% of all vehicles on the roads.
Overall, Navigant expects the worldwide market for LD NGVs to grow at a compound annual growth rate (CAGR) of 5.6% between 2014 and 2024, with the number of passenger car sales growing at a slightly slower rate (5.3% CAGR) than light trucks (5.6% CAGR). Asia Pacific will remain the largest market, with more than 2.0 million LD NGVs sales in 2024.
Rice U team uses new computational methodology to identify high capacity MOFs for on-board natural gas storage
December 18, 2014
Researchers from Rice University, Lawrence Berkeley National Laboratory and UC Berkeley have developed a computational methodology to support the experimental exploration of potential high-capacity metal organic frameworks (MOFs) for use in on-board storage of natural gas. The advantages to using MOFs as a storage medium are many and start with increased capacity over the heavy, high-pressure cylinders in current use.
In a paper in the ACS Journal of Physical Chemistry C, they report identifying 48 materials with higher predicted deliverable capacity (at 65 bar storage, 5.8 bar depletion, and 298 K) than MOF-5—the currently best available for the natural gas storage application. The best material identified by the researchers has a predicted deliverable capacity 8% higher than that of MOF-5.
Westport Innovations acquires alt fuel systems company Prins Autogassystemen for €12.2M
December 03, 2014
Natural gas engine and vehicle company Westport Innovations Inc. has acquired Netherlands based Prins Autogassystemen Holding B.V. for €12.2 million (US$15.1 million) through a combination of €6.6 million (US$8.2 million) in assumed liabilities and €5.6 million (US$6.9 million) in cash.
Founded in 1986, Prins is a leading developer of high quality alternative fuel systems powered by liquefied petroleum gas (LPG or propane), compressed natural gas (CNG), and liquefied natural gas (LNG) for light-, medium-, and heavy-duty applications. Prins operations in Europe will be combined under the Westport Applied Technologies business unit.
Start-up Eco-Motive developing dual-fuel “H” engine; parallel, independently fueled piston banks
December 01, 2014
|The H-engine—basically two separate engines housed within the same engine block—comprises two switchable parallel piston banks, independently fueled by gasoline and CNG. Click to enlarge.|
Startup Eco-Motive has developed what it calls the first dual-fuel “H” engine; it recently received a patent (#8807098) on the design. The H-shaped engine comprises parallel left-side and right-side vertical inline piston banks, each having a crankshaft and pistons, a cylinder head, and individual fuel feeds, but sharing a common power transmission system. Each piston bank operates independently of the other but is housed within the same engine block and has separate lubrication systems.
The Eco-Motive H-motor—basically two separate engines housed within the same engine block—can be powered by either gasoline or compressed natural gas (CNG), at the driver’s decision. The chosen engine is mechanically or electrically selected via an engine bank selector box using a selector control which selects the fuel type and engages a drive gear on the crankshaft of the selected engine, and transfers power to the transmission. The selector control actuates a transfer system that prevents simultaneous operation of both engines. The vehicle stays in that fuel mode until changed by the driver.
UT Austin to lead $58M study of methane hydrate in Gulf of Mexico; $41M from DOE
October 22, 2014
A research team led by The University of Texas at Austin has been awarded approximately $58 million to analyze methane hydrate deposits under the Gulf of Mexico. The grant, one of the largest ever awarded to the university, will allow researchers to advance the scientific understanding of naturally occurring methane hydrate so that its resource potential and environmental implications can be fully understood.
The US Department of Energy (DOE) is providing $41,270,609, with the remainder funded by industry and the research partners. Methane hydrate—natural gas trapped in an ice-like cage of water molecules—occurs in both terrestrial and marine environments. Prior programs in Alaska have explored gas hydrate reservoir potential and alternative production strategies, and additional testing programs are in development. While not part of this new program, the DOE further intends to evaluate production methods on terrestrial methane hydrate deposits in Alaska.
More on the Mercedes-Benz 2014 B-Class alternative drive systems: electric and natural gas
October 21, 2014
|B-Class Electric Drive (right) and B-Class Natural Gas Drive (left). Click to enlarge.|
Mercedes-Benz earlier gave the already successful B-Class a thorough facelift, giving particular attention to an upgrade of the interior. (Earlier post.) The revamped B-Class offers a choice of five diesel models with fuel ranging from 3.6 to 5.0 l/100 km (65.3 to 47 mpg US) and four gasoline engines at between 5.4 and 6.6 l/100 km (43.6 and 35.6 mpg US) as well as the B-Class Electric Drive (earlier post) and the B 200 Natural Gas Drive.
Both alternative drive models feature the modular “ENERGY SPACE” bodyshell concept: the underbody houses either the lithium-ion battery (B-Class Electric Drive) or one large and two smaller natural gas tanks and a 14‑liter gasoline tank (B 200 Natural Gas Drive). The B-Class Electric Drive and the B-Class Natural Gas Drive also differ in design from the gasoline and diesel models—particularly in the shaping of the front and rear aprons and the side skirts.
California Energy Commission to award up to $2.25M for R&D on advanced ignition systems for Class 3-8 natural gas engines
October 10, 2014
The California Energy Commission has issued a funding notice (PON-14-501) to support the applied research and development of advanced high-energy ignition systems capable of overcoming the challenges of igniting natural gas fuel under high boost pressures with heavy exhaust gas recirculation (EGR) for spark-ignited Class 3-8 engines.
Ignition characteristics of natural gas fuel represent challenges to engine manufacturers working to satisfy tighter emission standards, achieve lower fuel consumption and higher engine performance, and respond to market demand for extended maintenance options. Funded projects must involve the development and demonstration of one or both of the following concepts for new or existing ignition systems:
Westport updates HPDI 2.0 dual fuel system with new Delphi injectors, upgraded LNG storage and supply
October 01, 2014
|1st-generation Westport HPDI Injector and next-generation injector. (CNW Group/Westport Innovations Inc. Click to enlarge.|
Westport Innovations Inc. is updating its second-generation Westport high pressure direct injection (Westport HPDI 2.0) (earlier post) development program with a new family of high-pressure fuel injectors, co-developed with Delphi Automotive PLC. The new injectors are designed to provide lower cost, smaller size and improved packaging compared to prior generation Westport HPDI injector designs.
The new generation injectors are running in engine tests today and are on display at the Delphi booth at the IAA Commercial Vehicles Show in Hanover, Germany.
MAN shows TGX parallel diesel hybrid truck concept, previews CNG in TGM trucks at IAA; gearbox cooperation with Scania
September 28, 2014
|MANs TGX hybrid concept at IAA. Click to enlarge.|
At the IAA, MAN (part of the Volkswagen Group) presented a concept diesel-electric parallel hybrid version of its long-haul TGX truck. (MAN showed the Metropolis research truck, a range-extended electric refuse collection truck developed in collaboration with Benteler Engineering Services for use in the city, at IAA 2012, earlier post.) Also at IAA, MAN gave a preview of the CNG technology in trucks with a TGM distributor chassis; the CNG trucks are due in the market in 2016. (MAN has an established line of CNG-powered buses.)
TGX Hybrid. The MAN TGX concept hybrid will be driven by a parallel hybrid system, supplied by a 440 hp (328 kW) diesel engine and an electric motor with 130 kW drive power. The electric motor acts as an alternator when coasting and braking. A MAN TipMatic gearbox transfers power to the rear axle.
Groundbreaking in Turkmenistan for major synthetic gasoline plant; first full-scale Haldor Topsøe TIGAS facility
September 27, 2014
In August, a groundbreaking ceremony was held in Ovadan-Depe near the capital of Ashgabad in Turkmenistan to launch the construction of a major plant focused on the conversion of natural gas into synthetic gasoline. The plant will be based on Haldor Topsøe’s TIGAS (Topsøe Improved Gasoline Synthesis) technology (earlier post) and will become the first full-scale large commercial facility using this technology.
The plant has been awarded by the national gas company Turkmengas, and Topsøe will be working alongside the Japanese contractor Kawasaki Heavy Industry Ltd. and the Turkish contractor Rönesans Turkmen to engineer and construct the facility. The plant will be become operational in approximately four years from now with a daily production capacity of 15,500 bbl of synthetic gasoline.
ORNL study finds best current use of natural gas for cars is efficient production of electricity for EVs
September 24, 2014
|Top: Components of well-to-wheels pathway. Middle: WTW efficiency for CNGVs. Bottom: WTW efficiency for EVs. Curran et al. Click to enlarge.|
A well-to-wheels analysis of the use of natural gas for passenger vehicles by a team of researchers from Oak Ridge National Laboratory (ORNL) has found that, with a high PTW (pump-to-wheels) efficiency and the potential for high electrical generation efficiency with NGCC (natural gas combined cycle) turbines, natural gas currently is best used in an efficient stationary power application for charging EVs.
However, they also noted, high PTW efficiencies and the moderate fuel economies of current compressed natural gas vehicles (CNGVs) make them a viable option as well. If CNG were to be eventually used in hybrids, the advantage of the electric generation/EV option shrinks. Their open access paper is published in the journal Energy.
Westport unveils proprietary enhanced spark-ignited natural gas system; up to 10% improvement in power and torque over diesel
September 23, 2014
Westport Innovations Inc. unveiled the first generation of its new, proprietary enhanced spark-ignited (ESI) natural gas system. The new approach to natural gas combustion technology is designed to provide vehicle and engine original manufacturers (OEMs) with a “downsized” natural gas solution that is cost competitive while providing similar levels of power, torque, and fuel economy to a larger diesel engine.
Using 100% dedicated natural gas as fuel, Westport’s new technology optimizes the combustion and thermal efficiencies of the engine by taking advantages of the positive properties of natural gas. The Westport ESI combustion system is targeted at sub 9L engines for Class 6 and 7 trucks applications and is also adaptable for sub 2L applications for use in automotive and non-automotive applications.
Facelifted Mercedes-Benz B-Class with diesel, gasoline, natural gas and electric drives debuting at Paris show
September 12, 2014
Mercedes-Benz has given its B-Class range—more than 350,000 of which have been sold worldwide since market launch in late 2011—a major facelift including exterior and interior enhancements along with redefined design and equipment lines. Sales of the new B-Class commenced on 12 September, with the world première taking place during the Paris Motor Show (4 to 19 October). The revamped models will be making their way to dealerships from 29 November 2014.
Buyers have a wide choice of powertrains: five diesel models with fuel ranging from 3.6 to 5.0 l/100 km (65.3 to 47 mpg US); four gasoline engines at between 5.4 and 6.6 l/100 km (43.6 and 35.6 mpg US); alternative drive systems (B 200 Natural Gas Drive and B-Class Electric Drive); as well as optional 4MATIC all-wheel drive. The sports tourer also features a Cd value of less than 0.25. Prices in Europe will start from €27,102.25 (around US$35,000) for the B 180.
Soros signals Argentina’s shale is biggest place to be; doubles stake in YPF SA
September 04, 2014
by James Stafford of Oilprice.com
One of the world’s legendary investors is upping his bet on Argentina’s shale oil and gas industry in a show of confidence for shale production in South America’s largest unconventional prize—and a big boost for both supermajors and smaller players making big waves in the heart of new discovery areas.
George Soros has doubled his stake in YPF SA, the state-owned oil company in Argentina, which sits atop some of the world’s largest shale oil and gas resources, and is about to get even larger following a new discovery over the last couple of weeks of a second key shale play.
US MARAD study finds marine use of natural gas substantially reduces some air pollutants and slightly reduces GHG emissions
August 26, 2014
A recently released total fuel cycle analysis for maritime case studies shows that natural gas fuels reduce some air quality pollutants substantially, and reduce major greenhouse gas (GHG) emissions slightly, when compared to conventional petroleum-based marine fuels (low-sulfur and high-sulfur). The study was released by the US Department of Transportation’s (DOT) Maritime Administration (MARAD) and was conducted through a cooperative partnership with the Maritime Administration, the University of Delaware and The Rochester Institute of Technology.
They also found that the upstream configuration for natural gas supply matters in terms of minimizing GHG emissions on a total fuel cycle basis, and that the current infrastructure for marine fuels may produce fewer GHGs. Continued improvements to minimize downstream emissions of methane during vessel-engine operations will also contribute to lower GHG emissions from marine applications of natural gas fuels.
Volvo Trucks introduces new monofuel natural gas version of FE
August 20, 2014
|Volvo FE CNG. Click to enlarge.|
Volvo Trucks is expanding its model range in Europe with a new version of the Volvo FE running entirely on natural gas. The Volvo FE CNG (Compressed Natural Gas) has been primarily developed for operations involving short driving cycles with repeated starts and stops such as refuse collection and local distribution.
The Volvo FE CNG is powered by an all-new 9-liter Euro 6 engine featuring spark plug technology that produces 320 hp (239 kW) and 1356 N·m (1000 lb-ft) of torque. Spark plug technology is particularly suitable for driving cycles where the truck covers short distances with a lot of start-stop traffic, said Christina Eriksson, Business Manager Alternative Drivelines at Volvo Trucks.
OCM company Siluria pulls in $30M in D round led by Saudi Aramco; methane to fuels and chemicals
Siluria Technologies, a pioneer in the commercialization of an oxidative coupling of methane (OCM) technology to produce ethylene from natural gas (earlier post), announced the initial close of its Series D financing round. The round was led by Saudi Aramco Energy Ventures (SAEV), the venture investment subsidiary of Saudi Aramco and included additional investments by all of the major existing investors in Siluria. The total raise for this initial close of the Series D financing was $30 million.
With this initial Series D financing, Siluria has raised just under $100 million since its inception. Siluria is currently in discussions with additional strategic and financial investors to complete a total Series D financing of approximately $50 million.
U. Mich study: natural-gas-based ICE, BEV and FCV all show promise for environmental benefits relative to conventional ICE
August 19, 2014
Results of a lifecycle analysis by a team at the University of Michigan suggest that multiple types of natural gas-powered vehicles—i.e., natural-gas burning ICE vehicles; battery-electric vehicles (BEVs) recharged with gas-generated electricity; and fuel cell vehicles (FCVs) using hydrogen produced from natural gas—all show promise for reducing environmental impacts, energy demand and climate change impacts relative to conventional petroleum-fueled internal combustion engined vehicles for personal mobility.
Qiang Dai and Christian Lastoskie found that BEVs and FCVs in particular offer significant reductions in greenhouse gas emissions, especially if carbon capture and sequestration (CCS) technologies are implemented at the fuel conversion facilities. Their study appears in the ACS journal Energy & Fuels.
Mercedes-Benz showcasing new 7.7L Euro VI natural gas engine for medium-duty commercial vehicles at IAA; replaces two earlier models
August 08, 2014
|Relative (percent) CO2 emissions benefit of the new natural gas variant as compared to the 220 kW diesel engine. Benz et al.. Click to enlarge.|
Among its trucks on display at the upcoming IAA in Hanover, Mercedes-Benz will showcase an Econic equipped with its new Euro VI medium-duty natural gas engine (M 936NGT), which is derived from the 7.7-liter Euro VI M 936 inline six-cylinder diesel. This engine will replace the current natural gas engines based on 900 and 400 model series engines, with 6.9 and 12 liters of displacement respectively. These are lean-burn engines and fulfill Euro V EEV emissions specification.
As a mono-fuel engine, the new engine runs on compressed natural gas (CNG) and has an output of 221 kW (301 hp) while delivering maximum torque of 1200 N·m (885 lb-ft)—the same performance as the single-stage turbocharged diesel model. CO2 emissions are up to 22% below those of diesel (during high-load conditions), even with the lower efficiency of an Otto-cycle SI combustion engine relative to diesel. Using biogas further improves the carbon footprint.
DOE to award $9M to promote consensus on future fossil energy technologies
July 20, 2014
The US Department of Energy’s (DOE) Office of Fossil Energy will award $9 million over five years to organizations to assist it in building domestic and international consensus on future fossil energy technologies (DE-FOA-0001111). The Funding Opportunity Announcement (FOA) anticipates two awards being made: the first for $7 million in the area of Carbon Capture and Storage (CCS) and fossil-fuel-based Clean Energy Systems (CES); the second for $2 million in the area of international oil and natural gas.
One of the key missions of the Office of Fossil Energy is to “ensure the nation can continue to rely on traditional resources for clean, secure and affordable energy while enhancing environmental protection.” In pursuit of this, the Office provides outreach and education to many stakeholders, including the general public, in order to allow them to make educated choices about energy.
Review: Chevrolet Silverado 2500HD with bi-fuel CNG option
July 14, 2014
|View of the CNG tank in the bed of a Silverado 2500HD with bi-fuel option. Click to enlarge.|
GM’s 2015 Chevy Silverado 2500HD with the bi-fuel (natural gas) option (earlier post) offers buyers—primarily commercial and fleet buyers—a strong natural-gas option in the ¾-ton pickup market that combines the excellent qualities of the base Silverado 2500HD with the economic (lower cost) and environmental (lower emissions of GHGs and criteria pollutants) benefits of natural gas fuel and packages the two together seamlessly.
As with any vehicle choice, there are trade-offs that need to be balanced against target use. In the case of the 2500HD bi-fuel, the two main trade-offs are a reduction in power and torque in CNG mode compared to gasoline mode, and the loss of a portion of the bed of the truck to the 3,600 psi CNG tank and its box-like enclosure. (It looks like a hefty black tool box mounted across the front of the bed.) Of those two trade-offs, only the second is permanent. The driver can easily switch from CNG to gasoline with the flick of a switch, essentially reverting the 2500HD to its conventional gasoline cousin, with the accompanying boost in power and torque for occasions that might call for it.
Calysta reports 8-fold improvement in gas fermentation in ARPA-E program; BioGTL
July 10, 2014
Calysta, Inc. reported that it has achieved 8-fold improved performance over traditional fermentation technologies in a high mass transfer bioreactor. The bioreactor technology is under development for efficient methane-to-liquids fermentation processes, enabling rapid, cost-effective methane conversion into protein, industrial chemicals and fuels. (Earlier post.)
The improved performance was achieved in the research phase of a program funded in part by the Department of Energy’s ARPA-E program under the REMOTE program (Reducing Emissions using Methanotrophic Organisms for Transportation Energy), awarded in September 2013. (Earlier post.) Calysta develops sustainable industrial products using novel natural gas conversion technology using methane.
Critical review finds actual measurement data on segments of natural gas lifecycle sparse or lacking
July 08, 2014
After a critical review of the literature on the air impacts of increased natural gas acquisition, processing, and use, a team of US researchers has determined that that actual measurement data on various individual segments of the natural gas life cycle are sparse or critically lacking.
National and state regulators primarily use generic emission inventories to assess the climate, air quality, and health impacts of natural gas systems. These inventories rely on limited, incomplete, and sometimes outdated emission factors and activity data, based on few measurements, they found. In their paper, published in the ACS journal Environmental Science & Technology, they make a number of recommendations to maximize the benefits and minimize the negative impacts of the natural gas resource.
Navigant forecasts MHD vehicle market to nearly double by 2035 with declining share of conventional engines; gases win out over electricity
July 07, 2014
The number of medium- and heavy-duty vehicles (MHDVs) in use worldwide will nearly double between 2014 and 2035, according to a new forecast report by Navigant Research. Navigant projects that annual MHDV sales will grow throughout the forecast period at a compound annual growth rate (CAGR) of 2.4%.
Alternative fuel vehicles (AFVs)—including battery-electric (BEVs), plug-in hybrid (PHEVs), propane autogas (PAGVs) and natural gas vehicles (NGVs)—will grow from 5.0% of the market in 2014 to 11.2% by 2035. A majority of these AFVs will be NGVs and PAGVs. Vehicles running primarily on hydrogen and electricity will make up less than 1% of all MHDVs in 2035, according to Navigant.
EDI partners with Greenkraft for parallel-series multi-mode Class-4 CNG-PHEV truck; CEC funding
June 30, 2014
|Greenkraft truck. Click to enlarge.|
Efficient Drivetrains, Inc. (EDI), a producer of plug-in hybrid electric vehicle (PHEV) and continuously variable transmission (CVT) solutions (earlier post), is partnering with Greenkraft, CALSTART, and the California Energy Commission (CEC) to develop a Class-4 vehicle that combines the benefits of compressed natural gas (CNG) and PHEV technology. EDI was co-founded by Professor Andy Frank from UC Davis—a key figure in the development of the PHEV concept and technology—in 2006.
The effort combines EDI’s intelligent multi-mode PHEV powertrain (EDI-Drive) with Greenkraft’s CNG-powered 14,500-pound, Class-4 medium-duty truck, which is equipped with a 6.0L GM engine. EDI’s solution can improve the fuel economy of a conventional CNG-powered medium-duty truck by more than 40%, the company said.
Researchers propose CO2 recycling to improve Fischer-Tropsch GTL efficiency and reduce total CO2 emissions
June 21, 2014
|Overview of the CUGP processes. Credit: ACS, Zhang et al. Click to enlarge.|
Researchers in South Korea are suggesting two new carbon-dioxide-utilized Gas-to-Liquids processes (CUGP) to increase the overall efficiency of conventional Fischer-Tropsch GTL. In a paper in the ACS journal Environmental Science & Technology, they report that the two CUGP options increase carbon efficiency by 21.1−41.3% and thermal efficiency by 15.7−40.7%, with total CO2 emissions reduced by 82.0−88.4%, compared to different conventional F-T processes.
This results in a decrease in total CO2 emissions to less than 5g CO2/MJ F-T product, compared to a range of 27.0 to 36.2g CO2/MJ F-T product for the conventional processes.
Researchers review risk to water resources from unconventional shale gas development in US
June 19, 2014
A team from Duke University, Stanford University, Dartmouth College and Ohio State University has published in the ACS journal Environmental Science & Technology an overview and synopsis of recent investigations (as of January 2014) into one set of possible environmental impacts from unconventional shale gas development: the potential risks to water resources.
They identified four potential modes of water resource degradation: (1) shallow aquifers contaminated by fugitive natural gas (i.e., stray gas contamination) from leaking shale gas and conventional oil and gas wells, potentially followed by water contamination from hydraulic fracturing fluids and/or formation waters from the deep formations; (2) surface water contamination from spills, leaks, and the disposal of inadequately treated wastewater or hydraulic fracturing fluids; (3) accumulation of toxic and radioactive elements in soil and the sediments of rivers and lakes exposed to wastewater or fluids used in hydraulic fracturing; and (4) the overuse of water resources, which can compete with other water uses such as agriculture in water-limited environments.
DOE releases report on water-energy nexus
The US Department of Energy (DOE) released a new report that frames an integrated challenge and opportunity space around the water-energy nexus for DOE and its partners and lays the foundation for future efforts.
Present day water and energy systems are tightly intertwined. Water is used in all phases of energy production and electricity generation. Energy is required to extract, convey, and deliver water of appropriate quality for diverse human uses. Recent developments have focused national attention on these connections.
Porous material polymerizes carbon dioxide at natural gas wellheads; less costly and energy-intensive approach
June 03, 2014
|Particles of nitrogen-containing porous carbon polymerize CO2 from natural gas under pressure at a wellhead. When the pressure is released, the CO2 returns to gaseous form. Courtesy of the Tour Group. Click to enlarge.|
Scientists in the Rice University lab of chemist James Tour have developed materials that offer a lower cost, less energy-intensive way to separate carbon dioxide from natural gas at wellheads. The nucleophilic porous carbons, synthesized from simple and inexpensive carbon–sulphur and carbon–nitrogen precursors, pull only carbon dioxide molecules from flowing natural gas and polymerize them while under pressure naturally provided by the well.
When the pressure is released, the carbon dioxide spontaneously depolymerizes and frees the sorbent material to collect more. All of this works in ambient temperatures, unlike current high-temperature capture technologies that use up a portion of the energy being produced.
DOE issues request for information for Grand Challenges in Subsurface Engineering
May 11, 2014
The US Department of Energy (DOE) has issued a request for information for Grand Challenges in Subsurface Engineering (DE-FOA-0001135). The purpose of the RFI is to gather information from industry, academia, national laboratories, and other federal agency stakeholders on critical subsurface knowledge and/or technology gaps that, if filled, will enable significant improvements in the understanding of the character and behavior of the subsurface environment and improve the ability to access, predict, manipulate and monitor the subsurface. Responses to this RFI are due no later than 8:00 PM ET on 23 May 2014.
Background. Subsurface reservoirs account for more than 80% of US primary energy, and also offer potential for the storage of energy, CO2, and nuclear waste. Despite decades of development, DOE notes, current technologies do not allow full utilization of subsurface energy resources; for example, only ~10 to 40% of the oil and gas is recovered from shale and conventional reservoirs, respectively.
Motiv Engines introduces 2nd-generation split-cycle concept; MkII Clarke-Brayton heavy-duty engine being designed for LNG
May 08, 2014
|Section of the MkII Clarke-Brayton split-cycle engine. Note the three different cylinder sizes. Air moves sequentially from induction (top cylinder) to combustion (middle cylinder) to expansion (bottom cylinder). Click to enlarge.|
Motiv Engines, LLC introduced the second-generation of its engine concept dubbed the MkII Clarke-Brayton Engine, which it intends to develop into a heavy-duty on-highway engine fueled by liquid natural gas (LNG). The prototype is fueled by diesel, a first step in proving the technology before developing a new LNG fuel system.
The MkII Clarke-Brayton Engine is a boxer-configuration split-cycle engine implementing what Motiv calls the Clarke-Brayton cycle. The thermodynamics of the engine are virtually identical to the company’s previous CCI (Compact Compression Ignition) design, as described in a 2013 SAE paper, but are implemented in a much more conventional way.
DOE to award up to $35M for environmentally-prudent unconventional resource development
May 04, 2014
The US Department of Energy (DOE) has issued a funding opportunity announcement (DE-FOA-0001076) for projects in Fiscal Year 2014 (FY2014) that focus on improving the environmental performance of unconventional oil and natural gas (UOG)—i.e., shale gas, tight oil, and tight gas—resource development. DOE expects approximately $25-35 million to be available for new awards under the FOA.
While in-place, unconventional resources are substantial, recovery efficiencies are commonly low in these reservoirs. Current industry practice includes decreasing well and frac stage spacing to increase overall recovery. The objective of the new FOA is to address critical gaps of knowledge of the characterization, basic subsurface science, and completion/stimulation strategies of tight oil, tight gas, and shale gas resources to enable more efficient resource recovery from fewer and less environmentally impactful wells.
Cambridge study of near-term alternative London bus technologies finds lean-burn CNG most costly with greater climate impact than diesel
May 01, 2014
Researchers from the University of Cambridge have conducted a comprehensive environmental cost–benefit analysis of near-term alternative bus technologies. The study considered emissions of non-methane hydrocarbons (NMHC), CO, NOx, PM2.5, sulfur dioxide (SO2), and ammonia (NH3), as well as the lifecycle climate impact of CO2 and non-CO2 greenhouse gases (GHG) on a CO2-equivalent basis.
Their findings indicated that emission control strategy retrofits are the least costly near-term intervention to reduce urban air pollution. Although hybrid buses provide net GHG reductions and air quality improvements, associated costs are higher and more uncertain than emission retrofits. Lean-burn (spark ignition) compressed natural gas (LB-CNG) delivers the lowest health impacts due to the significant reduction of PM2.5, but has relatively high associated CO2e emissions that negate the health benefits, they found. As a result, current LB-CNG vehicles are the most costly of all of the modeled technologies, they concluded. Their study appears in the ACS journal Environmental Science & Technology.
Westport and Weichai launch WP12 engine and begin development of WD10 engine with Westport HPDI 2.0 technology
April 28, 2014
Westport Innovations Inc. has launched the final customer validation units of the next-generation Westport high pressure direct injection (Westport HPDI 2.0, earlier post) on the Weichai Westport WP12 engine platform. The Weichai Westport WP 12 HPDI is China’s first engine featuring Westport HPDI technology, delivering the power and performance of the base diesel engine, while replacing up to 95% of diesel fuel with cleaner burning, less expensive natural gas. Using Westport HPDI, the WP12 engine is expected to meet China V emission standards (roughly equivalent to Euro V) without a complex after-treatment system.
Weichai Westport plans to release 30 trucks for customer validation through 2014 with factory production expected to start in 2015. Weichai and Westport have also agreed to develop the 10-liter Weichai Westport WD10 engine with Westport HPDI 2.0. Weichai Westport will provide funding for the development with Westport supplying key components and engineering support.
DOE to award up to $20M for further studies on methane hydrates; projects worth up to $80M
April 14, 2014
The US Department of Energy (DOE) has issued a funding opportunity announcement for up to $20 million (DE-FOA-0001023) for applications for selection and award in FY 2014 that focus on the (1) methane hydrate reservoir-response field experiments in Alaska; and (2) field programs for marine gas hydrate characterization. DOE anticipates that individual total project values may be up to $80 million depending on the number of awards, complexity, duration, and level of recipient cost share.
These projects are to support program goals and represent a critical component of advancing several of the specific mandates previously established for the Methane Hydrate Program under the Methane Hydrate Act of 2000 (as amended by Section 968 of the Energy Policy Act of 2005).
DOE releases five-year strategic plan, 2014-2018; supporting “all of the above” energy strategy
April 08, 2014
The US Department of Energy (DOE) released its five-year 2014-2018 Strategic Plan. The plan is organized into 12 strategic objectives aimed at three distinct goals: Science and Energy; Nuclear Security; and Management and Performance. These objectives represent broad cross-cutting and collaborative efforts across DOE headquarters, site offices, and national laboratories.
The overarching goal for Science and Energy is: “Advance foundational science, innovate energy technologies, and inform data driven policies that enhance US economic growth and job creation, energy security, and environmental quality, with emphasis on implementation of the President’s Climate Action Plan to mitigate the risks of and enhance resilience against climate change.” Under that, the plan sketches out 3 strategic goals:
ERTRAC publishes roadmap on energy carriers and powertrains; role for power-to-gas
April 07, 2014
|Main technology trends and the vision share of engines in Europe. [ERTRAC / EUCAR] Click to enlarge.|
The European Road Transport Research Advisory Council (ERTRAC) has published a new roadmap assessing energy carriers and powertrains in the context of the European target to achieve a 60% reduction in CO2 emissions from transport by 2050. ERTRAC is the European Technology Platform (ETP) for Road Transport recognized and supported by the European Commission. ERTRAC has more than 50 members, representing all the actors of the Road Transport System: transport industry, European associations, EU Member States, local authorities, European Commission services, etc.
The analysis concludes that while the goal is challenging, it is also realizable; however the overall high-level goals need to be segmented into precise targets for the different industries and stakeholders. For the topic of future road mobility these are the development of alternative and decarbonized fuels and energy carriers; and higher powertrain efficiency leading to cleaner mobility and reduction in resource demand.
NRC report offers guidance on development of Phase 2 rules to reduce fuel consumption and GHG from medium-and heavy-duty vehicles; more natural gas and aerodyanamics, expanded lifecycle considerations
April 03, 2014
Expanding the use of natural gas as a transportation fuel and greater use of aerodynamic devices on trailers are among the 17 overarching strategies recommended by a new National Research Council report for reducing fuel consumption by tractor-trailers, transit buses, commercial vehicles, trucks, and other medium- and heavy-duty vehicles (MHDVs).
The report follows a 2010 Research Council report the findings and recommendations of which informed the “Phase I Rule” on fuel consumption and greenhouse gas emissions of medium- and heavy-duty vehicles issued jointly by the National Highway Traffic Safety Administration and US Environmental Protection Agency. (Earlier post.) The new report offers guidance for the “Phase II Rule” under development, which is directed at technologies and programs in the post-2018 time frame. (Earlier post.) The committee will expand upon this new work and issue a final report in 2016 that will cover a broader range of technologies and approaches that address the 2025-2030 time frame.
MIT Energy Initiative announces 2014 seed grant awards
March 30, 2014
The MIT Energy Initiative (MITEI) announced its latest round of seed grants to support early-stage innovative energy projects. A total of more than $1.6 million was awarded to 11 projects, each lasting up to two years. With this latest round, the MITEI Seed Fund Program has supported 129 early-stage research proposals, with total funding of about $15.8 million.
This year’s winners address a wide range of topics including new methods of designing and using catalysts; assessment of natural gas technologies; novel design concepts for batteries, energy harvesters, and capacitors; integrated photovoltaic–electrochemical devices to reduce CO2 for fuel production; and investigations into public opinion on various state energy policies.