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Title: Empirical Evidence for the Potential Climate Benefits of Decarbonizing Light Vehicle Transport in the U.S. with Bioenergy from Purpose-Grown Biomass with and without BECCS

Journal Article · · Environmental Science and Technology
ORCiD logo [1];  [2];  [3];  [4];  [3];  [5]
  1. Michigan State Univ., East Lansing, MI (United States). Great Lakes Bioenergy Research Center; Ben-Gurion Univ. of the Negev, Beer-Sheva (Israel). The French Associates Inst. for Agriculture and Biotechnology of Drylands, and The Jacob Blaustein Inst. for Desert Research
  2. Michigan State Univ., East Lansing, MI (United States). Great Lakes Bioenergy Research Center, W.K. Kellogg Biological Station; Cary Inst. of Ecosystem Studies, Millbrook, NY (United States)
  3. Michigan State Univ., East Lansing, MI (United States). Great Lakes Bioenergy Research Center
  4. Univ. of Wisconsin, Madison, WI (United States). Great Lakes Bioenergy Research Center
  5. Michigan State Univ., East Lansing, MI (United States). Great Lakes Bioenergy Research Center, W.K. Kellogg Biological Station

Climate mitigation scenarios limiting global temperature increases to 1.5 °C rely on decarbonizing vehicle transport with bioenergy production plus carbon capture and storage (BECCS), but climate impacts for producing different bioenergy feedstocks have not been directly compared experimentally or for ethanol vs electric light-duty vehicles. A field experiment at two Midwest U.S. sites on contrasting soils revealed that feedstock yields of seven potential bioenergy cropping systems varied substantially within sites but little between. Bioenergy produced per hectare reflected yields: miscanthus > poplar > switchgrass > native grasses ≈ maize stover (residue) > restored prairie ≈ early successional. Greenhouse gas emission intensities for ethanol vehicles ranged from 20 to -179 g CO2e MJ–1: maize stover $$\gg$$ miscanthus ≈ switchgrass ≈ native grasses ≈ poplar > early successional ≥ restored prairie; direct climate benefits ranged from ~80% (stover) to 290% (restored prairie) reductions in CO2e compared to petroleum and were similar for electric vehicles. With carbon capture and storage (CCS), reductions in emission intensities ranged from 204% (stover) to 416% (restored prairie) for ethanol vehicles and from 329 to 558% for electric vehicles, declining 27 and 15%, respectively, once soil carbon equilibrates within several decades of establishment. Extrapolation based on expected U.S. transportation energy use suggests that, once CCS potential is maximized with CO2 pipeline infrastructure, negative emissions from bioenergy with CCS for light-duty electric vehicles could capture >900 Tg CO2e year–1 in the U.S. In the future, as other renewable electricity sources become more important, electricity production from biomass would offset less fossil fuel electricity, and the advantage of electric over ethanol vehicles would decrease proportionately.

Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
FC02-07ER64494; AC05-76RL01830; SC0018409
OSTI ID:
1602764
Journal Information:
Environmental Science and Technology, Vol. 54, Issue 5; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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