Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
Bioresour Technol. 2015 Apr;182:258-266. doi: 10.1016/j.biortech.2015.01.135. Epub 2015 Feb 7.
The work develops a strategy for the production of ethanol from lignocellulosic biomass. In this strategy, the cellulose and hemicellulose fractions are simultaneously converted to sugars using a γ-valerolactone (GVL) solvent containing a dilute acid catalyst. To effectively recover GVL for reuse as solvent and biomass-derived lignin for heat and power generation, separation subsystems, including a novel CO2-based extraction for the separation of sugars from GVL, lignin and humins have been designed. The sugars are co-fermented by yeast to produce ethanol. Furthermore, heat integration to reduce utility requirements is performed. It is shown that this strategy leads to high ethanol yields and the total energy requirements could be satisfied by burning the lignin. The integrated strategy using corn stover feedstock leads to a minimum selling price of $5 per gallon of gasoline equivalent, which suggests that it is a promising alternative to current biofuels production approaches.
该工作开发了一种从木质纤维素生物质生产乙醇的策略。在该策略中，使用含有稀酸催化剂的γ-戊内酯（GVL）溶剂同时将纤维素和半纤维素部分转化为糖。为了有效地回收 GVL 用作溶剂以及生物质衍生的木质素用于供热和发电，设计了分离子系统，包括一种新颖的基于 CO2 的提取方法，用于从 GVL、木质素和胡敏素中分离糖。通过酵母共发酵将糖转化为乙醇。此外，还进行了热集成以降低公用工程需求。结果表明，该策略可获得高乙醇产率，总能源需求可通过燃烧木质素来满足。使用玉米秸秆原料的综合策略导致每加仑汽油当量的最低销售价格为 5 美元，这表明它是现有生物燃料生产方法的有前途的替代方案。
