[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.]
New LCFS pathway applications show Abengoa cellulosic ethanol with CI of 29.52 and 23.36 g CO2e/MJ
February 06, 2015
California Air Resources Board (ARB) staff has posted thirteen new Low Carbon Fuel Standard (LCFS) fuel pathway applications to the LCFS public comments website. Among them are two pathways for cellulosic ethanol produced by Abengoa Bioenergy at its Hugoton, Kansas plant. One pathway uses corn stover for feedstock, the other uses wheat straw. The carbon intensity (CI) for corn stover cellulosic ethanol is estimated to be 29.52 g CO2e/MJ; for wheat straw ethanol, the CI is estimated to be 23.36 g CO2e/MJ. The 2015 LCFS compliance schedule target for gasoline and fuels used as a substitue for gasoline is 96.48 g CO2e/MJ.
Corn stover comprises the dried leaves, stalks, husk, and cobs left on the ground after the harvest of the corn crop. Wheat straw is the dried stalk of the wheat crop after the grain and chaff have been removed. The carbon intensities of both pathways include the GHG emissions impacts associated with the nutrients that must be applied to fields from which stover and straw have been removed to make up for the nutrients lost when residues are removed.
California ARB issues feedstock-only pathway for camelina-based fuels under LCFS; zero ILUC emissions results in very low CI fuels
February 05, 2015
The California Air Resources Board has issued Sustainable Oils Inc., a wholly owned subsidiary of Global Clean Energy Holdings, a feedstock-only pathway for the production of camelina-based fuels under the Low Carbon Fuel Standard (LCFS). The feedstock-only CI (carbon intensity) is 7.58 gCO2e/MJ.
A feedstock-only pathway allows a fuel producer interested in producing either biodiesel or renewable diesel from a camelina feedstock using Sustainable Oils’ proprietary seed varieties to combine the CI of this pathway for the production of a camelina oil feedstock with the carbon intensity components of the fuel producer’s specific fuel production and transportation processes. The feedstock-only pathway includes only the CI components for farming, agricultural chemicals, camelina transportation, and oil extraction.
ICCT: available low-carbon fuels can reduce CI of on-road transportation fuels in Pacific Coast region by 14%–21% by 2030
January 23, 2015
|Fuel carbon intensity reduction from 2015-2030 from fuel deployment scenarios for the Pacific Coast region. Source: ICCT. Click to enlarge.|
A new study from the International Council on Clean Transportation (ICCT) and E4tech finds that the targets adopted or proposed by British Columbia, California, Oregon, and Washington to reduce the carbon intensity of transportation fuels can be met with a range of low-carbon fuel options. By 2030, the study concludes, low-carbon fuels could replace more than a quarter of the gasoline and diesel used by vehicles in the Pacific Coast region by 2030, with a reduction in the overall carbon intensity of on-road transportation fuels of 14%–21%.
The conclusions are based on a detailed modeling study of low-carbon fuel technologies and production pathways, estimating the future availability of low carbon fuels given policy incentives to supply them in the Pacific Coast region. The study presents eight scenarios for low-carbon fuel supply, including varying amounts of electricity, hydrogen, ethanol, biodiesel, renewable diesel, next generation cellulosic biofuel, and natural gas. Potential carbon savings were estimated by comparing the expected carbon intensity of these alternative fuels to the carbon intensity of the fossil fuels they replace.
Neste Oil seeking California LCFS approval for gutter oil to renewable diesel pathway
October 26, 2014
Among four new California Low Carbon Fuel Standard (LCFS) fuel pathway applications is a used cooking oil (gutter oil) to renewable diesel (NExBTL) pathway from Neste Oil at its Singapore plant. (Boeing and COMAC are opening a demonstration facility in China to convert gutter oil to renewable aviation fuel. Earlier post.)
Neste Oil Singapore Pte Ltd. produces approximately 250 million gallons annually of drop-in renewable diesel (RD)—i.e., not biodiesel—using a hydrogenation process and multiple oil and fat feedstocks. Neste has also filed applications for renewable diesel pathways for California (all from its Singapore plant) using Southeast Asian rendered fish oil (earlier post); New Zealand tallow (earlier post); North American tallow (earlier post), and Australian tallow (earlier post). Of the five RD pathways proposed so far, the gutter oil pathway has the lowest carbon intensity.
Oregon DEQ seeking public comments on implementing Low Carbon Fuel Standard before sunset in 2015
October 06, 2014
Oregon’s Department on Environmental Quality (DEQ) is inviting public comment on a proposed rulemaking that would fully implement Oregon’s low carbon fuel standard (LCFS). (Earlier post.) The first phase required Oregon producers and importers of fuels to register with DEQ, keep records and submit reports about the fuels they currently supply. The second phase—the rules for which DEQ is currently seeking comments—require the same parties to meet the low carbon fuel standards by supplying cleaner fuels in Oregon or purchasing credits from clean fuel providers.
The proposed Oregon Clean Fuels Program Phase 2 rules would: implement the enabling legislation of House Bill 2186, originally passed in 2009; establish clean fuel standards to reduce greenhouse gas emissions from Oregon’s transportation fuels by 10% over a 10-year period; and require importers of transportation fuels to reduce the average carbon intensity of fuels they provide in Oregon to meet the annual clean fuel standards.
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.
California ARB staff posts concept paper on re-adoption and modification of LCFS; possible more stringent post-2020 targets
March 10, 2014
The California Air Resources Board (ARB) staff has posted a Low Carbon Fuel Standard (LCFS) Re-Adoption Concept Paper, which will be discussed during the LCFS workshop on 11 March 2014. The LCFS regulation mandates a 10% reduction in the carbon intensity (CI) of transportation fuels used in California by 2020.
In response to a suit brought against ARB and the LCFS, the State of California Court of Appeal, Fifth Appellate District (Court) held in 2013 that the LCFS would remain in effect and that ARB can continue to implement and enforce the 2013 regulatory standards while it takes steps to cure California Environmental Quality Act and Administrative Procedure Act issues associated with the original adoption of the regulation. ARB staff is proposing that the Board re-adopt the LCFS regulation in 2014. Additionally, ARB staff is proposing a suite of amendments to provide a stronger signal for investments in and production of the cleanest fuels, offer additional flexibility, update critical technical information, and provide for improved efficiency and enforcement of the regulation.