tailieunhanh - Global potential bioethanol production from wasted crops and crop residues

The global annual potential bioethanol production from the major crops, corn, barley, oat, rice, wheat, sorghum, and sugar cane, is estimated. To avoid con/icts between human food use and industrial use of crops, only the wasted crop, which is de0ned as crop lost in distribution, is considered as feedstock. Lignocellulosic biomass such as crop residues and sugar cane bagasse are included in feedstock for producing bioethanol as well. There are about 73:9 Tg ofdry wasted crops in the world that could potentially produce 49:1 GL year−1 ofbioethanol. About 1:5 Pg year−1 ofdry lignocellulosic biomass from these seven crops is also available for conversion to bioethanol | Available online at BIOMASS BIOENERGY ELSEVIER Biomass and Bioenergy 26 2004 361-375 locate biombioe Global potential bioethanol production from wasted crops and crop residues Seungdo Kim Bruce E. Dale Department of Chemical Engineering Materials Science Room 2527 Engineering Building Michigan State University East Lansing MI 48824-1226 USA Received 1 April 2003 received in revised form 31 July 2003 accepted 5 August 2003 Abstract The global annual potential bioethanol production from the major crops corn barley oat rice wheat sorghum and sugar cane is estimated. To avoid conflicts between human food use and industrial use of crops only the wasted crop which is defined as crop lost in distribution is considered as feedstock. Lignocellulosic biomass such as crop residues and sugar cane bagasse are included in feedstock for producing bioethanol as well. There are about Tg of dry wasted crops in the world that could potentially produce GL year-1 of tio ed i r ol. About Pg year-1 of dry ig r c celhlossk boomass t rom theee seven crops is also available for conversion to bioethanol. Lignocellulosic biomass could produce up to 442 GL year-1 of bioethanol. Thus the total potential bioethanol production from crop residues and wasted crops is 491 GL year-1 about 16 times higher than the current world ethanol production. The potential bioethanol production could replace 353 GL of gasoline 32 of the global gasoline consumption when bioethanol is used in E85 fuel for a midsize passenger vehicle. Furthermore lignin-rich fermentation residue which is the coproduct of bioethanol made from crop residues and sugar cane bagasse can potentially generate both 458 TWh of lilcctiaciA about of wlrld electricity production and EJ of steam. Asia is the largest potential producer of 0 1 01 from orop mitino and wcLtred orops and could produce up to 291 GL year-1 of bioethanol. Rice straw wheat straw and corn stover are the most .