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Novel heat-integrated and intensified biorefinery process for cellulosic ethanol production from lignocellulosic biomass

机译：从木质纤维素生物质生产纤维素乙醇的新型热集成强化生物精制工艺

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Biofuels have the most potential as an alternative to "fossil fuels and overcoming global warming, which has become one of the most serious environmental issues over the past few decades. As the world confronts food shortages due to an increase in world population, the development of biofuels from inedible lignocellulosic feedstock may be more sustainable in the long term. Inspired by the NREL conventional process, this paper proposes a novel heat-integrated and intensified biorefinery design for cellulosic ethanol production from lignocellulosic biomass. For the preconcentration section, heat pump assisted distillation and double-effect heat integration were evaluated, while a combination of heat-integrated technique and intensified technique, extractive dividing wall column (EDWC), was applied to enhance the process energy and cost efficiency for the purification section. A biosolvent, glycerol, which can be produced from biodiesel production, was used as the extracting solvent in an EDWC to obtain a high degree of integration in a biorefinery context. All configuration alternatives were simulated rigorously using Aspen Plus were based on the energy requirements, total annual costs (TAC), and total carbon dioxide emissions (TCE). In addition, the structure of the EDWC was optimized using the reliable response surface method, which was carried out using Minitab statistical software. The simulation results showed that the proposed heat-integrated and intensified process can save up to 47.6% and 56.9% of the TAC and TCE for the purification section, respectively, compared to the conventional purification process. (C) 2016 Elsevier Ltd. All rights reserved.
机译：生物燃料具有替代“化石燃料和克服全球变暖的最大潜力”，在过去的几十年中，该问题已成为最严重的环境问题之一。由于世界人口增加，世界面临粮食短缺，因此世界粮食的发展成为人类面临的最大挑战。从不可食用的木质纤维素原料中获得的生物燃料从长远来看可能更具可持续性，在NREL常规工艺的启发下，本文提出了一种新型的热集成和强化生物精炼厂设计，用于从木质纤维素生物质生产纤维素乙醇。进行了双效热集成评估，同时采用了热集成技术和强化技术相结合的萃取式分隔壁塔（EDWC），以提高纯化段的工艺能耗和成本效率。可以从生物柴油生产中生产，用作EDWC在生物精炼厂中获得高度整合。根据能源需求，年度总成本（TAC）和总二氧化碳排放量（TCE），使用Aspen Plus严格模拟了所有配置方案。此外，使用可靠的响应面方法优化了EDWC的结构，该方法使用Minitab统计软件进行。仿真结果表明，与传统的纯化工艺相比，本发明的热集成和强化工艺可分别节省多达47.6％和56.9％的TAC和TCE。 （C）2016 Elsevier Ltd.保留所有权利。

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