The pretreatment of biomass and the subsequent enzymatic hydrolysis to sugars play an important role in the production of biofuels from lignocellulosic biomass. However, the influence of pretreatment and hydrolysis yields on the production pathway performance of biofuels is rarely researched from the beginning. Moreover, a clear trade‐off between economic efficiency and environmental impact exists. Production pathways can be evaluated with reaction network flux analysis (RNFA) ( Voll A and Marquardt W, Reaction network flux analysis: Optimization‐based evaluation of reaction pathways for biorenewables processing. AIChE J 58(6):1788–1801 (2012)). Utilizing RNFA, this study explores the influence of biomass pretreatment, focusing on changes in biomass composition, fractionation efficiency, and sugar yield after hydrolysis on the production performance of biofuels for several pretreatment concepts and several wood sources. The results show that, for ethanol and ethyl levulinate production, specific fuel costs and carbon loss correlate reciprocally with the yields of pretreatment and hydrolysis. For a constant biofuel output, the main cost driver is the feed stream of biomass, which decreases with an improved overall sugar yield after pretreatment. Furthermore, above a threshold value, specific fuel costs increase strongly with carbon loss. As a result, a minimal yield of 40% carbohydrates from wood seems to be the limit of viable production in the processes that were considered. We therefore developed a facile strategy to assess the performance of pretreatment and hydrolysis in biomass processing © 2020 The Authors. Biofuels, Bioproducts, and Biorefining published by Society of Chemical Industry and John Wiley & Sons, Ltd.

中文翻译：

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生物质预处理的最低可行糖产量

生物质的预处理和随后的酶促水解为糖在木质纤维素生物质生产生物燃料中起着重要作用。然而，从一开始就很少研究预处理和水解产率对生物燃料生产途径性能的影响。此外，在经济效率和环境影响之间存在明确的权衡。可以通过反应网络通量分析（RNFA）评估生产路径（Voll A和Marquardt W，反应网络通量分析：基于优化的生物可再生能源加工反应路径评估。AIChE J 58（6）：1788–1801（2012）） 。这项研究利用RNFA，探索了生物质预处理的影响，重点关注生物质组成，分馏效率，和水解后的糖产量对几种预处理概念和几种木材来源的生物燃料生产性能的影响。结果表明，对于乙醇和乙酰丙酸乙酯的生产，特定的燃料成本和碳损失与预处理和水解的产量成反比。对于恒定的生物燃料产量，主要的成本驱动因素是生物质的进料流，随着预处理后糖总产量的提高，生物质的进料流减少。此外，高于阈值时，特定燃料成本随着碳损失而大大增加。结果，从木材中获得最低40％的碳水化合物产量似乎是所考虑的过程中可行生产的极限。因此，我们制定了一种简便的策略来评估生物质加工中预处理和水解的性能©2020作者。生物燃料