Conceptual net energy output for biofuel production from lignocellulosic biomass through biorefining
Conceptual net energy output for biofuel production from lignocellulosic biomass through biorefining
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DOI：
10.1016/j.pecs.2012.03.007
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发表时间：
2012-08
影响因子：
29.5
通讯作者：
J. Zhu;X. Zhuang
中科院分区：
文献类型：
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作者：
J. Zhu;X. Zhuang
在可检索的文献中缺乏关于中试规模工艺和能量数据的全面信息，这些工艺和能量数据使用有前景的工艺技术和商业上可扩展的和可用的资本设备用于木质纤维素生物质生物精炼。本研究对从木质纤维素生产生物燃料的选定糖平台生物精炼工艺概念的能源效率进行了全面审查。来自代表纤维素生物燃料生产概念的最新技术水平的大约十几项研究的过程数据，沿着农业操作的文献能量输入数据，进行了分析，以提供净能量生产的估计。结果发现，适当分配的能量投入的肥料和农药的木质纤维素生物质和主要的农业或林业产品，如玉米和木材，分别在玉米种植园和木材种植园，是至关重要的。文献数据的显著差异表明，需要进行研究，以确定农业和农业机械燃料的能源投入。将预处理中的固体负载增加到至少25%对于减少生物炼制中的能量输入至关重要。木质生物质加工应采用热化学预处理后粉碎的方法。当使用适当的预处理技术时，木质生物质可以像草本生物质和农业残留物一样有效地处理。纤维素乙醇的净能量输出估计约为-500-2000兆焦耳/吨生物质（HHV基础）;表明纤维素乙醇的能量输入/输出比约为1：1。然而，当包括来自木质素的能量时，净能量可以达到约4000-7000 MJ/吨生物质。
There is a lack of comprehensive information in the retrievable literature on pilot scale process and energy data using promising process technologies and commercially scalable and available capital equipment for lignocellulosic biomass biorefining. This study conducted a comprehensive review of the energy efficiency of selected sugar platform biorefinery process concepts for biofuel production from lignocelluloses. The process data from approximately a dozen studies that represent state-of-the-art in cellulosic biofuel production concepts, along with literature energy input data for agriculture operations, were analyzed to provide estimates of net energy production. It was found that proper allocation of energy input for fertilizer and pesticides to lignocellulosic biomass and major agriculture or forestry products, such as corn and lumber in corn farming and lumber plantations, respectively, were critical. The significant discrepancies in literature data suggest studies are needed to determine energy inputs for fuel in farming and farm machinery. Increasing solids loading in pretreatment to at least 25% is critical to reducing energy input in a biorefinery. Post thermo-chemical pretreatment size reduction approach should be adopted for energy efficient woody biomass processing. When appropriate pretreatment technologies are used, woody biomass can be processed as efficiently as herbaceous biomass and agricultural residues. Net energy output for cellulosic ethanol was estimated to range approximately from −500–2000 MJ/ton biomass (HHV base); indicating that the energy input/output ratio is approximately 1:1 for cellulosic ethanol. However, net energy can reach approximately 4000–7000 MJ/ton of biomass when energy from lignin is included.