I’d be interested in reading that if you can find it.
Actually, this article indicates that the process makes its own fuel. Also, the feedstock used can be zero tillage stuff like saw grass that you can mow twice a year with 9’ high yields. That means not a lot tractor fuel to bring in tons of material. No intensive fertilizer either.
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Cellulose ethanol is made from the non-food portion of renewable feedstocks such as cereal straws and corn stover. Iogen is claiming 75 Gallons per ton of straw, with roughly 2/3 of the straw being converted.
According to Iogen Corporation, the agriculture residues used to make cellulose ethanol also contain lignin - a material that can be burned to generate power to run the cellulose ethanol facility. Because of this ability to produce both fuel and energy, the US Department of Energy life-cycle analysis states that ethanol from cellulose reduces greenhouse gases by 90% compared to gasoline.
Ethanol is one of the fuel options that:
reduces overall CO2 emissions from vehicles
runs in today’s cars (as E10) without any need for automobile modifications or changes to the fuel distribution system and
is economical in comparison with all alternatives including many vehicle technology solutions
Cellulose ethanol has two unique advantages over conventional ethanol made from corn.
the greenhouse gas emission reductions from cellulose ethanol are three times greater than those from grain based ethanol on a life cycle basis.
cellulose ethanol is made from a plentiful and renewable resource, the non-food portion of agriculture crops (e.g. straw, corn stalks and corn cobs).