Separation process is very crucial in bioethanol production as it consumes the highest energy in the process. Unlike other works, this research systematically designed a suitable separation process for bioethanol production from corn stover by using thermodynamic insight. Two separation processes, i.e., extractive distillation (case 2) and pervaporation (case 3), were developed and compared with conventional molecular sieve (case 1). Process design and simulation were done by using Aspen Plus program. The process evaluation was done not only in terms of energy consumption and process economics but also in terms of environmental impacts. It was revealed that pervaporation is the best process in all aspects. Its energy consumption and carbon footprint are 60.8 and 68.34% lower than case 1, respectively. Its capital and production costs are also the lowest, 37.0 and 9.88% lower than case 1.

中文翻译：

---

玉米秸秆生产生物乙醇分离工艺的系统设计

分离过程在生物乙醇生产中非常关键，因为它消耗了过程中的最高能量。与其他工作不同，本研究利用热力学见解系统地设计了一种适合的分离方法，用于从玉米秸秆生产生物乙醇。开发了两种分离方法，即萃取蒸馏（案例2）和全蒸发（案例3），并将其与常规分子筛（案例1）进行了比较。使用Aspen Plus程序进行过程设计和仿真。不仅在能源消耗和过程经济方面，而且还在环境影响方面进行过程评估。结果表明，渗透蒸发是所有方面的最佳工艺。它的能耗和碳足迹分别比案例1低60.8％和68.34％。