Global potential bioethanol production from wasted crops and crop residues
Global potential bioethanol production from wasted crops and crop residues
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DOI：
10.1016/j.biombioe.2003.08.002
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发表时间：
2004-01-01
影响因子：
6
通讯作者：
Dale, BE
中科院分区：
文献类型：
--
作者：
Kim, S;Dale, BE
对玉米、大麦、燕麦、水稻、小麦、高粱和甘蔗等主要作物的全球生物乙醇年潜在产量进行了估计。为了避免人类粮食使用和作物工业用途之间的冲突，只有废弃作物（定义为分配过程中损失的作物）被视为原料。木质纤维素生物质（例如农作物残留物和甘蔗渣）也包含在生产生物乙醇的原料中。世界上大约有 73.9 Tg 的干燥废弃作物可能生产 49.1 GL 年(-1) 的生物乙醇。来自这七种作物的约 1.5 Pgyear(-1) 干燥木质纤维素生物质也可用于转化为生物乙醇。木质纤维素生物质可生产高达 442 GL 年(-1) 的生物乙醇。因此，利用作物残茬和废弃作物生产的生物乙醇的总潜在产量为 491 GL 年(-1)，大约是目前世界乙醇产量的 16 倍。当生物乙醇用于中型乘用车的 E85 燃料时，潜在的生物乙醇产量可替代 353 GL 汽油（占全球汽油消耗量的 32%）。此外，富含木质素的发酵残渣是由农作物残渣和甘蔗渣制成的生物乙醇的副产品，有可能产生 458 TWh 的电力（约占世界发电量的 3.6%）和 2.6 EJ 的蒸汽。亚洲是利用作物残茬和废弃作物生产生物乙醇的最大潜在生产国，可生产高达 291 GL 年(-1) 的生物乙醇。稻草、麦秆和玉米秸秆是亚洲最有利的生物乙醇原料。第二个潜力最大的地区是欧洲（69.2 GL 生物乙醇），其中大部分生物乙醇来自麦秆。玉米秸秆是北美的主要原料，可生产约 38.4 GL 年(-1) 的生物乙醇。全球范围内稻草可生产205GL的生物乙醇，这是单一生物质原料中产量最大的。第二高潜力的原料是麦秆，它可以生产 104 GL 的生物乙醇。本文旨在对全球和各地区生物乙醇原料资源的规模提出一些看法，并总结相关数据，我们相信其他人会发现这些数据有用，例如，那些对从农作物和废物中生产乳酸（而不是乙醇）等生物基产品感兴趣的人。该论文并未试图表明这种废料中有多少（如果有的话）实际上可以转化为生物乙醇。 (C) 2003 Elsevier Ltd. 保留所有权利。
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 73.9 Tg of dry wasted crops in the world that could potentially produce 49.1 GL year(-1) of bioethanol. About 1.5 Pg year(-1) of dry lignocellulosic biomass from these 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 electricity (about 3.6% of world electricity production) and 2.6 EJ of steam. Asia is the largest potential producer of bioethanol from crop residues and wasted crops, and could produce up to 291 GL year(-1) of bioethanol. Rice straw, wheat straw, and corn stover are the most favorable bioethanol feedstocks in Asia. The next highest potential region is Europe (69.2 GL of bioethanol), in which most bioethanol comes from wheat straw. Corn stover is the main feedstock in North America, from which about 38.4 GL year(-1) of bioethanol can potentially be produced. Globally rice straw can produce 205 GL of bioethanol, which is the largest amount from single biomass feedstock. The next highest potential feedstock is wheat straw, which can produce 104 GL of bioethanol. This paper is intended to give some perspective on the size of the bioethanol feedstock resource, globally and by region, and to summarize relevant data that we believe others will find useful, for example, those who are interested in producing biobased products such as lactic acid, rather than ethanol, from crops and wastes. The paper does not attempt to indicate how much, if any, of this waste material could actually be converted to bioethanol. (C) 2003 Elsevier Ltd. All rights reserved.