[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.]
Clariant to scale-up catalysts for Gevo’s Ethanol-to-Olefins (ETO) technology; renewable diesel and hydrogen
May 19, 2016
Gevo, Inc. has entered into an agreement with Clariant Corp., one of the world’s leading specialty chemical companies, to develop catalysts to enable Gevo’s Ethanol-to-Olefins (ETO) technology.
Gevo’s ETO technology, which uses ethanol as a feedstock, produces tailored mixes of propylene, isobutylene and hydrogen, which are valuable as standalone molecules, or as feedstocks to produce other products such as diesel fuel and commodity plastics, that would be drop-in replacements for their fossil-based equivalents. ETO is a chemical process, not a biological process as is Gevo’s conversion of biomass to isobutanol.
California ARB staff releases first batch of recertified CI pathways for fuels under readopted LCFS using CA-GREET 2.0
May 10, 2016
The staff of the California Air Resources Board (ARB) released the first full set of carbon intensity (CI) pathways certified under the readopted LCFS regulation using the CA-GREET 2.0 model. (Earlier post.) These pathways include both new applications and requests to have “legacy” pathways (adopted under the prior LCFS rule) recertified.
The initial batch of released CIs contains only ethanol pathway; similar batches will be released for other fuel types in the future.
China team identifies new thermophilic bacterium for direct production of ethanol from brown algae
April 04, 2016
Researchers from the Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences have identified and characterized the first thermophilic bacterium capable (Defluviitalea phaphyphila) of direct conversion of brown algae to ethanol.
D. phaphyphila Alg1 can simultaneously utilize mannitol, glucose, and alginate to produce ethanol. In an open access paper on their work published in the journal Biotechnology for Biofuels, they report high ethanol yields of 0.47 g/g-mannitol, 0.44 g/g-glucose, and 0.3 g/g-alginate.
NREL process boosts production of ethanol from algae
February 10, 2016
A new biorefinery process developed by scientists at the Energy Department’s National Renewable Energy Laboratory (NREL) has proven to be significantly more effective at producing ethanol from algae than previous research.
The process, dubbed Combined Algal Processing (CAP), is detailed in an open-access paper in the journal Algal Research. The research follows work previously done at NREL and published in 2014 in The Royal Society of Chemistry’s journal Green Chemistry. In that work, scientists examined two promising algal strains, Chlorella and Scenedesmus, to determine their applicability as biofuel and bioproduct producers. They concluded Scenedesmus performed better in this process with impressive demonstrated total fuel yields of 97 gallons gasoline equivalents (GGE) per ton of biomass.
New method for creating interspecies yeast hybrids could boost biofuels production
December 05, 2015
Researchers at the University of Wisconsin-Madison have developed a simple, robust, and efficient method for generating interspecies yeast hybrids. As reported in the journal Fungal Genetics and Biology, this method provides an efficient means for producing novel synthetic hybrids for beverage and biofuel production, as well as for constructing tetraploids to be used for basic research in evolutionary genetics and genome stability.
Some 500 years ago, the accidental natural hybridization of Saccharomyces cerevisiae—the yeast responsible for things like ale, wine and bread—and a distant yeast cousin gave rise to lager beer. Today, cold-brewed lager is the world’s most consumed alcoholic beverage, fueling an industry with annual sales of more than $250 billion.
Researchers improve efficiency of ethanol-to-butanol conversion with new bifunctional catalyst
December 04, 2015
Researchers at the University of Rochester and the University of Ottawa (Canada) have developed a highly selective (>99%) tandem catalytic system—a bifunctional iridium catalyst coupled with bulky nickel or copper hydroxides—for the conversion of ethanol (up to 37%) to n-butanol, through the Guerbet process.
The team was able to increase the amount of ethanol converted to butanol by almost 25% over currently used methods without producing unwanted byproducts. A paper describing the new system is published in the Journal of the American Chemical Society.
Bio-isobutanol company Gevo enters major licensing and development agreement with Praj
November 10, 2015
Gevo, Inc. has entered into a license agreement and a joint development agreement with Praj Industries Limited to enable the licensing of Gevo’s isobutanol technology to processors of non-corn based sugars, including the majority of Praj’s global customer base of ethanol plant owners. The two companies had signed a memorandum of understanding on licensing earlier this year. (Earlier post.)
As part of these agreements, Praj will invest substantial resources in the development and optimization of Gevo’s isobutanol technology for use with non-corn feedstocks including sugar cane, sugar beets, cassava, rice, sorghum, wheat and certain cellulosic sugars. This development work is anticipated to lead to process design packages (PDP) that would be expected to accelerate the licensing of Gevo technology to processors of these, particularly in Praj’s extensive customer base. The development work is expected to build upon the PDP that Gevo already has developed for corn, translating it to other feedstocks and plant configurations.
JCAP researchers propose artificial photosynthetic system for high-yield production of ethanol
November 09, 2015
A team at the Joint Center for Artificial Photosynthesis (JCAP) at Lawrence Berkeley National Laboratory and UC Berkeley is proposing an artificial photosynthesis scheme for direct synthesis and separation to almost pure ethanol with minimum product crossover using saturated salt electrolytes.
In a paper in the RSC journal Energy & Environmental Science, Professor Alexis Bell and postdoc Meenesh Singh describe the novel design of an integrated artificial photosynthetic system that continuously produces >90 wt% pure ethanol using a polycrystalline copper cathode and an IrO2 anode at a current density of 0.85 mA cm-2. The annual production rate of > 90 wt% ethanol using such a photosynthesis system operating at 10 mA cm-2 (12% solar-to-fuel (STF) efficiency) can be 15.27 million gallons per year per square kilometer, corresponding to 7% of the industrial ethanol production capacity of California, they suggest.
ORNL team discovers mechanism behind direct ethanol-to-hydrocarbon conversion; implications for energy efficiency and cost of upgrading
November 04, 2015
Researchers at Oak Ridge National Laboratory (ORNL) have discovered that the reactions underlying the transformation of ethanol into higher-grade hydrocarbons unfolds in a different manner than previously thought.
The research, supported by DOE’s BioEnergy Technologies Office (BETO), has implications for the energy efficiency and cost of catalytic upgrading technologies proposed for use in bio-refineries. Uncovering the mechanism behind the reaction helps support the potential economic viability of ORNL’s own direct biofuel-to-hydrocarbon conversion approach. An open-access paper on their findings is published in Nature Scientific Reports.
Lux: Despite softness in utilization, global biofuels capacity to grow to 61.4 BGY in 2018; driven by novel fuels and feedstocks
August 31, 2015
The global biofuels industry averaged 68% in utilization rate from 2005 to 2014, reached a high of 80.9% in 2007, dropped to a low of 56.9% in 2012, and climbed slightly back to 60.4% in 2014. Despite the still apparent softness in capacity utilization, and the on-going softness in fossil fuel prices, global biofuels capacity will continue to grow from 55.1 billion gallons per year (BGY) to 61.4 BGY in 2018, according to a forecast by Lux Research. However, Lux predicts, growth between now and 2018 will not be a continuation of current course.
While ethanol and biodiesel will continue to dominate in absolute terms, these will grow at only a 1.5% CAGR through 2018. Novel fuels and feedstocks will drive the biofuels industry forward at a much more rapid 17% and 22% CAGRs through 2018, respectively.
BIO: RFS’ biofuel requirements saved 589.3M tons of carbon emissions over past decade
August 24, 2015
Over its 10-year lifespan, the Renewable Fuel Standard’s (RFS’) requirement to substitute biofuels for fossil fuels has displaced nearly 1.9 billion barrels of foreign oil and reduced US transportation-related carbon emissions by 589.33 million metric tons, according to a new analysis released by the Biotechnology Industry Organization (BIO).
To develop its estimates, BIO utilized the GREET1.2013 model to compare carbon emissions from the mixture of US transportation fuels (both petroleum and biofuel) under two scenarios. The first scenario applied the annual required RFS Renewable Volume Obligation (RVO) percentages, as established by EPA rulemakings, to the volumes of fossil-based, non-renewable gasoline and diesel used in the United States. To establish a second scenario, BIO assumed that corn ethanol and soy biodiesel would have continued to meet just over 3% of the total reported transportation fuel use over the decade and that petroleum gasoline and diesel would have been used instead.
UC Riverside team characterizes impact on PM of fuels with varying aromatics and octane rating; benefit of increased ethanol fraction
August 18, 2015
Researchers at the University of California-Riverside have characterized the effect of decreased aromatic content fuels combusted in advanced vehicle technologies on emissions of particulate matter (PM). In a paper in the ACS journal Environmental Science & Technology, they present the changes in PM emissions for different fuels, engine technologies, and operating conditions. Among their findings is that an increased ethanol fraction in gasoline could help reduce PM mass and black carbon (BC) from gasoline direct injection engines (GDI).
Typical commercial gasoline comprises varying concentrations of aromatic hydrocarbons and octane ratings; the impacts on PM such as black carbon (BC) and water-soluble and insoluble particle compositions of these differences are not well-defined. The UC Riverside study tested seven 2012 model year vehicles, including one port fuel injection (PFI) configured hybrid vehicle; one PFI vehicle; and six GDI vehicles.
Tsinghua studies on alcohol-gasoline dual fuel engines show fuel efficiency and particle number benefits
August 10, 2015
Researchers at Tsinghua University in China are studying the effects of Dual-Fuel Spark Ignition (DFSI) combustion fueled with different alcohols and gasoline. In one paper, published in the journal Fuel, they investigated the use of alcohols–gasoline DFSI Combustion for knock suppression and high fuel efficiency using a gasoline engine with high compression ratio.
In a second paper, also published in Fuel, they systematically compared the stoichiometric alcohol–gasoline and gasoline–alcohol DFSI combustion for engine particle number (PN) reduction (and fuel economy improvement), also using a high compression ratio gasoline engine.
Brazil’s UNICA opposes EPA’s proposed RFS changes; says sugarcane ethanol can meet volume requirements
July 30, 2015
UNICA, the Brazilian Sugarcane Industry Association, this week submitted formal comments to the US Environmental Protection Agency (EPA) opposing the agency’s proposed reductions (relative to the volumes originally specified) to the Renewable Fuel Standard (RFS) volume targets for 2014, 2015 and 2016—and especially the volume target for advanced biofuels. (Earlier post.)
Four separate percentage standards are required under the RFS program: cellulosic biofuel; biomass-based diesel; advanced biofuel; and total renewable fuels. Cellulosic biofuel and biomass-based diesel categories are nested within advanced biofuel, which is itself nested within the total renewable fuel category. The advanced biofuels category contains renewable fuel other than ethanol derived from corn starch; that is derived from renewable biomass; and that achieves a 50% GHG emissions reduction requirement. This is the category in which sugarcane ethanol finds itself.
NREL examines potential of blending ethanol with condensate for flex-fuels and high-octane mid-level blends
July 21, 2015
A team at the National Renewable Energy Laboratory (NREL), with a colleague at EcoEngineering, has explored the potential of blending ethanol with natural gasoline (condensate) to produce flex-fuels (ASTM D5798-13a) and high-octane, mid-level ethanol blends (MLEBs). A paper on their work is published in the ACS journal Energy & Fuels.
The study addresses two current market conditions: first, more ethanol is produced domestically than can legally be blended in E10 (the ethanol blend wall). Second, as a result of recent increases in crude oil and natural gas production in the US, condensate—a component of natural gas liquids (NGLs) found in rich gas—is produced in abundance and could potentially serve as a lower-cost blendstock. Current US production of condensate is estimated at 1.5 × 108 m3 annually compared to 9.7 × 107 m3 annually 10 years ago.
EPA honors winners of the 20th Annual Presidential Green Chemistry Challenge; advanced biofuels
July 14, 2015
The US Environmental Protection Agency (EPA) honored the six 2015 Presidential Green Chemistry Challenge Award winners at a ceremony in Washington, DC. EPA’s Office of Chemical Safety and Pollution Prevention sponsors the Presidential Green Chemistry Challenge Awards in partnership with the American Chemical Society Green Chemistry Institute and other members of the chemical community including industry, trade associations, academic institutions, and other government agencies.
For 2015, EPA announced a new award category for a green chemistry technology that has a “Specific Environmental Benefit: Climate Change.” The 2015 winners are Algenol; Lanzatech; Renmatix; Professor Eugene Y.-X. Chen of Colorado State University; Soltex; and Hybrid Coating Technologies.
ArcelorMittal, LanzaTech and Primetals to build €87M commercial-scale waste-gas-to-ethanol plant
July 13, 2015
ArcelorMittal, the world’s leading steel and mining company; LanzaTech; and Primetals Technologies, a leading technology and service provider to the iron and steel industry have entered into a letter of intent to construct Europe’s first commercial-scale production facility to create bioethanol from waste gases produced during the steelmaking process. (Earlier post.)
The €87-million (US$96 million) plant will produce 47,000 tons (about 15.7 million gallons US, 60 million liters) per year of ethanol. The resulting bioethanol can cut greenhouse gas emissions by more than 80% compared with conventional fossil fuels. It will predominantly be used in gasoline blending, but it can also be further processed into other products such as drop in jet fuel.
LanzaTech gas fermentation technology at core of €14.6M EU Steelanol project; 25K t/year demo plant
June 26, 2015
LanzaTech’s gas fermentation technology (earlier post) is at the core of the new Horizon2020 Steelanol project (2015-2018), which seeks to produce bioethanol via an innovative gas fermentation process using exhaust gases emitted by the steel industry. The €14.6-million (US$16.3-million) project is coordinated by steelmaker Arcelormittal Belgium NV.
Steelanol’s main objective is to demonstrate the cost-effective production of sustainable bioethanol, with the purpose of assessing the valorization of this ethanol biofuel as a fuel derivative for the transport sector. The project will build a demonstration plant of approximately 25,000 tons/ethanol per year—the first of its kind in Europe, and the largest facility globally built to date utilizing this technology.
“Energiewende” in a tank; Audi e-fuels targeting carbon-neutral driving with synthetic fuels from renewables, H2O and CO2; Swiss policy test case
June 12, 2015
Like other major automakers, Audi (and its parent Volkswagen Group) is working on meeting its medium-term regulatory requirements (e.g., in the 2020 timeframe) by reducing the average fuel consumption of its new vehicles using a combination of three primary measures: optimizing its combustion engines for greater efficiency; developing alternative drive concepts, such as hybrid, plug-in hybrid and gas-powered vehicles; and reducing total vehicle weight through lightweight construction with an intelligent multimaterial mix.
Unlike the others, however, Audi over the past few years has embarked on a comprehensive approach to developing a range of new CO₂-neutral fuels as part of its overall strategy for sustainable, carbon-neutral mobility: Audi e-fuels. Audi’s basic goal is to combine renewable energy (e.g. solar and wind), water and CO2 to produce liquid or gaseous fuels with a very low carbon intensity. Audi e-fuels are intended to use no fossil or biomass sources; do not compete with food production; and are 100% compatible with existing infrastructure.
St1 Etanolix food-waste-to-ethanol plant integrated into oil refinery in Gothenburg
June 08, 2015
The first Etanolix plant delivered to the international market by Finland-based St1 Biofuels Oy was inaugurated in Gothenburg, Sweden last week. The plant, built for North European Bio Tech Oy (NEB), recycles feedstocks such as food industry biowaste and process residue from local bakeries and bread from shops that is past its sell-by date into ethanol for transport fuel.
The ethanol plant is fully integrated into the functions and logistics of St1 oil refinery in Gothenburg and has an annual production capacity of 5 million liters (1.3 million gallons US) of advanced bioethanol. The integration yields significant synergy benefits in the use of residual heat and cooling and in product distribution. The refinery staff will operate the Etanolix plant.
USDA to invest up to $100M to boost infrastructure for renewable fuel use; seeks to double number of higher blend ethanol fuel pumps
May 29, 2015
US Agriculture Secretary Tom Vilsack announced that the US Department of Agriculture (USDA) will invest up to $100 million in a Biofuels Infrastructure Partnership to support the infrastructure needed to make more renewable fuel options available to American consumers. USDA will post a Notice of Solicitation of Applications in June.
Specifically, USDA will administer competitive grants to match funding for state-led efforts to test and evaluate innovative and comprehensive approaches to market higher blends of renewable fuel, such as E15 and E85. States that are able to provide greater than a one-to-one ratio in funding will receive higher consideration.
EPA proposes volume requirements for Renewable Fuel Standard for 2014-2016
Adhering to a schedule in a proposed consent decree (earlier post), the US Environmental Protection Agency (EPA) announced its long-awaited proposed volume requirements (renewable volume obligations, RVO) (earlier post) under the Renewable Fuel Standard (RFS) program for the years 2014, 2015 and 2016, and also proposed volume requirements for biomass-based diesel for 2017. The period for public input and comment on the proposal will be open until 27 July. EPA says it will finalize the volume standards in this rule by 30 November.
EPA is proposing to establish the 2014 standards at levels that reflect the actual amount of domestic biofuel used in that year; the standards for 2015 and 2016 (and 2017 for biodiesel) increase steadily over time, with the most aggressive growth projected for the problematic area of cellulosic biofuels: from 33 million gallons in 2014 to 206 million gallons in 2016.