Biotech Updates

Solid Biofuels Much More Efficient in Reducing GHG Emissions Than Corn Ethanol

September 26, 2008
http://biopact.com/2008/09/solid-biofuels-570-more-efficient-than.html

The Biopact website reports of a recently released (Dutch-Canadian) study which found that “solid biofuel technology using biomass from energy crops for heat energy (developed by a company, REAP-Canada) reduces GHG (greenhouse gas) emissions by 7,600-13,100 kg CO2e /ha (CO2e=equivalent carbon dioxide). On the other hand, soybean biodiesel and corn ethanol were found to have a GHG emissions reduction of only 1,500 kg CO2e/ha. GHG emissions reduction by solid biofuels is better than corn or soybean based biofuels by a factor of 7.7. The study also gives recommendations on how to produce energy from solid biofuels which are efficient. One of the production processes is known as “torrefaction” (also known as “mild pyrolysis”, “roasting”, or “wood browning”). The process involves ‘gently roasting” the biomass up to 280oC, then “cooking” in an oxygen-free environment between 200oC and 300oC. By this roasting process, “the energy density can be improved dramatically, and its fuel properties altered in a way that the fuel can be (co-)fired in existing power structures. More details of the study can be obtained from the book published by Springer Publishers, “Biofuels, Solar and Wind as Renewable Energy Systems: Benefits and Risks”..