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首页> 外文期刊>Clean technologies and environmental policy >Design of biorefinery systems for conversion of corn stover into biofuels using a biorefinery engineering framework
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Design of biorefinery systems for conversion of corn stover into biofuels using a biorefinery engineering framework

机译：使用生物精炼工程框架设计用于将玉米秸秆转化为生物燃料的生物精炼系统

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Unlocking the potential and value of lignocellulosic residues is an important step in making biorefineries economically and environmentally promising. This calls for a holistic and systematic approach in designing sustainable industrial systems. In this work, biorefinery systems via biochemical route (acetone–butanol–ethanol or ABE system) and thermochemical route (gasification and mixed alcohols or GMA system) for converting corn stover into biofuels have been designed using a Sustainable Engineering Framework. The framework involves eight main steps: (1) design problem definition, (2) data collection, (3) process synthesis and simulation, (4) process integration, (5) resource recovery from residues, (6) utility system design, (7) economic and environmental modelling and (8) economic value and environmental impact margin analysis for decision making. Consideration of resource recovery from biorefinery waste streams has proven to be the key in making biorefineries self-sustaining and with low environmental impacts. Simultaneous economic and environmental feasibility assessment at the early stage of process design is highly envisaged. The cost of biofuel production in the ABE system has been found to be 49.2 US$/GJ and 69.9 US$/GJ in the GMA system. The greenhouse gas emissions are 46.2 g CO~(2)-eq/GJ for ABE and 19.0 g CO~(2)-eq/GJ for GMA, lower than gasoline (85 g CO~(2)-eq/GJ). The GMA system is not economically compelling though with high environmental benefit, while the ABE system has shown to be both economically and environmentally feasible.
机译：释放木质纤维素残留物的潜力和价值是使生物精炼厂在经济和环境方面都充满希望的重要一步。这就要求在设计可持续工业系统时采取整体和系统的方法。在这项工作中，使用可持续工程框架设计了通过生化途径（丙酮-丁醇-乙醇或ABE系统）和热化学途径（气化和混合醇或GMA系统）将玉米秸秆转化为生物燃料的生物精炼系统。该框架包括八个主要步骤：（1）设计问题定义，（2）数据收集，（3）流程综合和仿真，（4）流程集成，（5）从残留物回收资源，（6）实用系统设计，（ 7）经济和环境建模，以及（8）经济价值和环境影响裕度分析，用于决策。事实证明，考虑从生物炼油厂废物流中回收资源是使生物炼油厂能够自我维持且对环境影响较小的关键。强烈希望在过程设计的早期阶段同时进行经济和环境可行性评估。在ABE系统中，生物燃料的生产成本为49.2美元/ GJ，在GMA系统中为69.9美元/ GJ。 ABE的温室气体排放量为46.2 g CO〜（2）-eq / GJ，GMA的温室气体排放量为19.0 g CO〜（2）-eq / GJ，低于汽油（85 g CO〜（2）-eq / GJ）。 GMA系统虽然具有很高的环境效益，但在经济上并不具有吸引力，而ABE系统已证明在经济和环境上都是可行的。

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