August 22nd, 2006

I took some time to compare the two most common biofuels pound-for-pound, just to check if what we are promoting to supplant fossil fuels, is in fact logical. Here is a excerpt from the paper entitled "Environmental, Economic, And Energetic Costs And Benefits Of Biodiesel And Ethanol Biofuels" from the University of Minnesota.
*Ethanol yields 25% more energy than the energy invested in its production, biodiesel yields 93% more energy than the energy invested in its production.
*Compared with ethanol, biodiesel releases just 1.0%, 8.3%, and 13% of the agricultural nitrogen, phosphorus, and pesticide pollutants, respectively, per net energy gain.
*Relative to the fossil fuels biofuels displace, greenhouse gas emissions are reduced 12% by the production and combustion of ethanol and 41% by biodiesel.
*Biodiesel releases less air pollutants per net energy gain than ethanol.
*Biodiesel is produced form lower agricultural inputs and more efficient feedstock to fuel conversion.
*Neither biofuel can replace much petroleum without impacting food supplies (this statement must assume that other factors remain ceteris paribus or not-changing).
*If the US devotes all of its corn and soybean to biofuel production, it would meet 12%of US gasoline demand and 6% of US diesel demand.
I hope that puts things in perspective.
Study conducted by Messer Jason Hill, Erik Nelson, David Tilman, Stephen Polasky and Douglas Tiffany
November 27th, 2006 at 6:28 pm
Biofuels will decrease our dependence to imported oil and will help our rural economy.
May 22nd, 2009 at 10:01 am
Biofuel is one of the most best renewable energy we have here today!
I am doing a project on renewable energy and none stood out except for biofuel!
February 17th, 2011 at 1:04 pm
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