[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.]
Iogen proposes new method to increase renewable content of transportation fuels; renewable hydrogen from biogas for refinery hydrogenation units
January 23, 2014
Cellulosic biofuel and biochemical company Iogen Corporation has developed and filed for patents on a new method to increase the renewable energy content of liquid transportation fuels. The production method involves processing biogas to deliver renewable hydrogen and then incorporating the renewable hydrogen into conventional liquid fuels via selected refinery hydrogenation units.
The company estimates there is refining capacity in place to incorporate 5-6 billion gallons per year of renewable hydrogen content into gasoline and diesel fuel. Iogen says it will initially commercialize the approach using landfill biogas, and then expand production using biogas made in the cellulosic ethanol facilities it is currently developing.
California Energy Commission to award up to $24M for new biofuel projects
January 17, 2014
The California Energy Commission announced the availability of up to $24 million in grant funds for the development of new, or the modification of existing, California-based biofuel production facilities that can sustainably produce low-carbon transportation fuels. (PON-13-609) Eligible biofuels are diesel substitutes, gasoline substitutes, and biomethane as defined in the solicitation.
The allocation of funds by fuel category is: Diesel Substitutes – $9.0 million; Gasoline Substitutes – $9.0 million; and Biomethane – $6.0 million. The Energy Commission will conduct two rounds of scoring. The first round of scoring will fund at least $4.027 million in passing projects; remaining funds will be applied to the second round of scoring.
Swiss WTW study finds important role for alternative fuels as well as alt drivetrains in move to low-emissions vehicles
January 03, 2014
|WTW energy demand and GHG emissions for EV and PHEV drivetrains for various electricity sources; gasoline ICE vehicle is solid square, hybrid the hollow square. Click to enlarge.|
A comprehensive analysis of well-to-wheel (WTW) primary energy demand and greenhouse gas (GHG) emissions for the operation of conventional and alternative passenger vehicle drivetrains in Switzerland has concluded that alternative combustion fuels—not only alternative drivetrains such as PEVs or FCVs—play an important role in the transition towards low-emission vehicles.
The study by a team at the Swiss Federal Institute of Technology Zurich, reported in the Journal of Power Sources, is novel in three respects, the researchers said. First, it considers the performance of both mature and novel hydrogen production processes, multiple electricity generation pathways and several alternative drivetrains. Second, it is specific to Switzerland. Third, the analysis offers a novel comparison of drivetrain and energy carrier production pathways based on natural resource categories.
Clean Energy Fuels to distribute biomethane vehicle fuel to fleets and public stations
October 03, 2013
Clean Energy Fuels Corp., North America’s largest provider of natural gas for transportation, is commercially offering a biomethane vehicle fuel—Redeem—made from waste streams such as landfills, large dairies and sewage plants directly to fleets around the country and at 35 public Clean Energy stations throughout California. Redeem will be available in either compressed natural gas (CNG) or liquefied natural gas (LNG) form.
Andrew J. Littlefair, president and CEO of Clean Energy, said that the company’s goal is to produce and to distribute 15 million gallons of Redeem in the first year. Clean Energy’s natural gas fueling infrastructure includes 400 fueling stations throughout the nation; the company is developing multiple biomethane production facilities that are expected to produce Redeem.
Volvo Trucks to begin limited production of DME heavy-duty trucks in NA in 2015; customer trials; Oberon partnership
June 07, 2013
|Volvo VNL D13 with DME. Click to enlarge.|
At an event in Sacramento, California, Volvo Trucks announced that it will commercialize dimethyl ether (DME)-powered heavy-duty commercial vehicles in North America, with limited production beginning in 2015. Volvo also revealed ongoing customer field testing of DME trucks in the US (with Safeway and Martin Transportation), as well as its partnership in the customer trials with startup DME producer Oberon Fuels. Oberon Fuels is the first company to announce plans to commercialize DME fuel production in North America. (Earlier post.)
DME offers diesel-quality performance with a high cetane number and low auto-ignition temperature, but burns cleanly without producing any soot. It is non-toxic, non-carcinogenic, and can be made from a variety of sustainable domestic sources, as well as from North America’s abundant supply of natural gas. The carbon intensity of the DME will vary with the feedstock, but with the use of bio-gas (biomethane) from an anaerobic digester as input into the Oberon process, DME can provide up to a 95% CO2 reduction compared to diesel. Volvo has been testing Bio-DME in Sweden since 2009. (Earlier post.)
PNNL solar thermochemical reaction system can reduce fuel consumption in natural gas power plants by about 20%; future potential for transportation fuels
April 11, 2013
|PNNL’s thermochemical conversion device is installed in front of a concentrating solar power dish. Photo: PNNL. Click to enlarge.|
A new concentrating solar power system developed by Pacific Northwest National Laboratory (PNNL) can reduce the fuel consumption of a modified natural-gas combined-cycle (NGCC) power plant by about 20%. The system converts natural gas into syngas—with higher energy content than natural gas—using a thermochemical conversion device installed in front of a concentrating solar power dish. The power plant then combusts the more energy dense syngas to produce electricity.
PNNL’s system uses a mirrored parabolic dish to direct sunbeams to a central point, where the thermochemical device uses the solar heat to produce syngas form natural gas. About four feet long and two feet wide, the device contains a chemical reactor and several heat exchangers. Concentrated sunlight heats up the natural gas flowing through the reactor’s channels, which hold a catalyst that helps turn natural gas into syngas.
Researchers develop high-rate, high-yield bacterial process to convert methane to methanol
March 22, 2013
|Cartoon of the process. Click to enlarge.|
Researchers at Columbia University have developed a biological process utilizing autotrophic ammonia-oxidizing bacteria (AOB) for the conversion of methane (CH4) to methanol (CH3OH). A paper on their work is published in the ACS journal Environmental Science & Technology.
In fed-batch reactors using mixed nitrifying enrichment cultures from a continuous bioreactor, up to 59.89 ± 1.12 mg COD/L (COD = chemical oxygen demand, an indirect measurement of organic compounds in water) of CH3OH was produced within an incubation time of 7 h—approximately 10x the yield obtained previously using pure cultures of Nitrosomonas europaea. The maximum specific rate of CH4 to CH3OH conversion obtained during this study was 0.82 mg CH3OH COD/mg AOB biomass COD-d—1.5x times the highest value reported with pure cultures.
Audi to introduce natural gas A3 Sportback g-tron at year’s end; CO2-neutral e-gas
March 01, 2013
|Audi A3 Sportback g-tron. Click to enlarge.|
Audi will introduce the compact A3 Sportback g-tron—which can be powered by the CO2-neutral Audi e-gas, synthetic methane generated from eco-electricity in the Audi e-gas project (earlier post)—at the end of the year. The e-gas fuel will be produced in the power-to-gas plant in Werlte, Germany.
The five-door car consumes on average less than 3.5 kilograms per 100 km of compressed natural gas (CNG) or Audi e-gas. CO2 tailpipe emissions are less than 95 grams per km (153 g/mile) in gas mode. When the A3 Sportback g-tron is powered by Audi e-gas, no more CO2 is released than was chemically input in its production beforehand, creating a closed loop. When the energy required to build the e-gas facility and wind power generators is included in a comprehensive analysis, CO2 emissions under e-Gas operation are still less than 30 grams per km (48.28 g/mile).
California Energy Commission awards more than $17M to support alternative fuel and infrastructure projects
February 14, 2013
The California Energy Commission (CEC) approved $17,223,593 for eight projects including alternative fuel production, plug-in truck demonstrations, EV charging station deployment, and infrastructure planning. The awards were made through the Commission’s Alternative and Renewable Fuel and Vehicle Technology Program, created by Assembly Bill 118. This program is slated to invest approximately $90 million during this fiscal year to develop new transportation technologies, as well as alternative and renewable fuels. It is paid for through surcharges on vehicle and boating registrations, and smog check and license plate fees.
These awards also assist in fulfilling Governor Brown’s executive order directing state government to support the rapid commercialization of zero-emission vehicles (ZEVs) in California, with a 2025 target of having 1.5 million ZEVs on the state’s roads. The order also requires the installation of sufficient infrastructure to support 1 million ZEVs in California by 2020. (Earlier post.)