[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.]
EPA qualifies new biogas and electricity pathways for cellulosic biofuel requirement under RFS; defers decision on other proposed pathways
July 03, 2014
In a newly released rule, the US Environmental Protection Agency (EPA) has clarified the number of cellulosic biofuel renewable identification numbers (RINs, earlier post) that may be generated for fuel made with feedstocks of varying cellulosic content; qualified additional fuel pathways to meet the lifecycle greenhouse gas (GHG) reduction requirements for cellulosic biofuel under the National Renewable Fuel Standard (RFS) program; and clarified or amended a number of RFS program regulations that define terms or address registration, record-keeping, and reporting requirements. The final rule also clarifies that EPA considers corn kernel fiber to be a crop residue.
However, the final rule differs in several ways from the Notice of Proposed Rulemaking EPA had issued in June 2013 (earlier post):
ARB: carbon intensity of biomethane from wastewater sludge could be as low as -65.27 g CO2e/MJ
May 22, 2014
The staff of the California Air Resources Board (ARB) staff has posted three new Low Carbon Fuel Standard (LCFS) fuel pathway applications to the LCFS public comments website: one for corn ethanol (from Heartland Corn Products in Minnesota) and one ARB staff-developed pathway (with two scenarios) for the production of biomethane from the mesophilic anaerobic digestion of wastewater sludge at a wastewater treatment plant (WWTP) located at a publicly-owned treatment works (POTW).
Under the LCFS, the baseline CI value for gasoline was 95.86 g CO2e/MJ; for diesel fuel, 94.71 g CO2e/MJ. Staff estimated the carbon intensities (CIs) for biomethane produced under two alternative scenarios; under the first scenario, the CI of biomethane is 10.86 g CO2e/MJ; under the second, the CI is -65.27 g CO2e/MJ—i.e., it generates a credit.
Velocys, Waste Management, NRG Energy and Ventech form JV for small-scale gas-to-liquids plants
March 24, 2014
Velocys plc, a developer of smaller-scale microchannel gas-to-liquids (GTL) technology, has entered a joint venture (JV) with Waste Management, NRG Energy (NRG), and Ventech Engineers International (Ventech) to develop gas-to-liquids (GTL) plants in the United States and other select geographies.
The JV will pursue the development of multiple plants utilizing a combination of renewable biogas (including landfill gas) and natural gas. Waste Management intends to supply renewable gas and, in certain cases, project sites. All four members will work exclusively through the JV to pursue the intended application (GTL using renewable gas, optionally in conjunction with natural gas) in the United States, Canada, United Kingdom and China.
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.