再沸器
工艺工程
过程(计算)
环境科学
制浆造纸工业
废物管理
化学
材料科学
计算机科学
色谱法
工程类
蒸馏
操作系统
作者
Jiyan Liu,Zhenyu Zhang,Min Sun,Jie Kong,Mengru Dong,Lanyi Sun
标识
DOI:10.1016/j.cherd.2022.11.023
摘要
Fuel ethanol has attracted wide attention due to its advantages of environmental friendliness, high octane number, and excellent explosion resistance. In this paper, the design and intensification for the ethanol production process by hydrogenation of methyl acetate is developed. The conventional process containing reaction units and separation units is established. The separation units are optimized upon minimum the total annual cost (TAC). Subsequently, the dividing wall column (DWC) and extractive dividing wall column (EDWC) techniques are applied to obtain the DWC-EDWC intensified process. The results show that the TAC, CO2 emissions, and total energy consumption (TEC) of the DWC-EDWC intensified process are reduced by 9.4%, 14.9%, and 28.7%, respectively. To further improve thermodynamic efficiency, the DWC-EDWC with intermediate reboiler (DWC-IR-EDWC) intensified process is proposed. It is indicated that the DWC-IR-EDWC intensified process has more advantages in the economy. Finally, pinch technology is carried out to make full use of the heat of process streams. Compared with the conventional process, the TAC, CO2 emissions, and TEC of the modified process with heat exchange networks (HENs) are reduced by 23.7%, 29.3%, 65.4%, respectively, and the thermodynamic efficiency is increased by 9.1%.
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