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Date:1/30/2013

l feedstocks at cost-competitive prices year round, but feedstocks markedly vary from region-to-region," Singh says. "Also, individual feedstocks within a given region are also quite variable, depending on weather conditions, handling, storage and crop variety. Blending and densifying different feedstocks to create a single uniform feedstock has been proposed as a solution, but not much scientific attention has been paid to the efficiency of converting mixtures of feedstocks into fermentable sugars and fuels."

Given that global temperatures are now setting record highs and that the burning of fossil fuels is releasing an additional 9 billion metric tons of excess atmosphere-warming carbon each year, both the planet and the American economy stand to benefit from a large-scale domestic advanced biofuels industry. Produced from the microbial fermentation of sugars in lignocellulosic biomass, advanced biofuels are clean, green and renewable, and could displace gasoline, diesel and jet fuel on a gallon-for-gallon basis and be directly dropped into today's engines and infrastructures.

The sugars in lignocellulosic biomass, however, are complex polysaccharides that are deeply embedded within a very recalcitrant material called lignin. To break apart the complex lignocellulose and help hydrolyze the released polysaccharides into sugars that can be fermented by microbes, researchers at JBEI and elsewhere have been studying biomass pretreatments with ionic liquids environmentally benign organic salts often used as green chemistry substitutes for volatile organic solvents.

Researchers at INL have been investigating ways to increase the energy densities of biomass feedstocks and make delivery to refineries much more economical. Milling feedstocks into flour or pellets is an effective process for large-scale energy densification, but before this latest study it was unknown as to how densification of single or mixed feedstocks would impact ionic liqui
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Contact: Lynn Yarris
lcyarris@lbl.gov
510-486-5375
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

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