APR Winter 2018.indd
نویسندگان
چکیده
THE EXISTING US Renewable Fuel Standard (RFS) makes commercial-scale cellulosic ethanol a priority, calling for 16 billion gallons of cellulosic biofuel production by 2022, sourced from grasses, trees, agricultural residues, and municipal waste. The US Department of Energy “US Billion-Ton Update” study (Downing et al. 2011) suggests that to meet the mandates in the RFS, approximately 66 million tons of corn stover may be needed annually. This equates to nearly 50 percent of the total annual stover produced by Illinois, Iowa, Minnesota, and Nebraska (Sesmero et al. 2015). Stover as an energy crop is appealing because the Midwest produces a lot of it; yet commercialization lags behind the progress made in other cellulosic crops for two signi icant reasons. First, stover is a crop residue with a highThe “Stover Availability versus Supply” Puzzle and Contracting Options for Cellulosic Biomass1
منابع مشابه
Nascer no Brasil: the presence of a companion favors the use of best practices in delivery care in the South region of Brazil
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