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Switchgrass ethanol delivers 540 percent of the energy used to produce it

zod · 2008-01-09 12:10:35

But yields from a grass that only needs to be planted once would deliver an average of 13.1 megajoules of energy as ethanol for every megajoule of petroleum consumed—in the form of nitrogen fertilizers or diesel for tractors—growing them. "It's a prediction because right now there are no biorefineries built that handle…

09-01-2008 12:10pm

#1

zod

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But yields from a grass that only needs to be planted once would deliver an average of 13.1 megajoules of energy as ethanol for every megajoule of petroleum consumed—in the form of nitrogen fertilizers or diesel for tractors—growing them. "It's a prediction because right now there are no biorefineries built that handle cellulosic material" like that which switchgrass provides, Vogel notes. "We're pretty confident the ethanol yield is pretty close." This means that switchgrass ethanol delivers 540 percent of the energy used to produce it, compared with just roughly 25 percent more energy returned by corn-based ethanol according to the most optimistic studies.

Taken from http://www.sciam.com/article.cfm?id=grass-makes-better-ethanol-than-corn

If you've got the time some excellent info here : http://www.youtube.com/watch?v=NMB8-8tPuWE

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