Thermodynamic Analysis of Membrane Separation-Enhanced Co-Hydrogenation of CO2/CO to Ethanol

Jian Chen, Weijie Fu, Shuilian Liu, Yiming He, Chalachew Mebrahtu, Qiaoqiao Zhou, Yuting Zhang, Xuerui Wang, Huanhao Chen, Feng Zeng, Xuehong Gu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Co-hydrogenation of CO2/CO to produce ethanol presents an important way to utilize carbon-neutralized biomass resources through gasification. By applying a water-permselective membrane reactor, water, the byproduct of CO2/CO hydrogenation to ethanol, can be removed. Thus, ethanol formation can be promoted thermodynamically. Accordingly, herein, the thermodynamics of ethanol synthesis by CO2, CO, CO2/CO hydrogenation was investigated, as well as the promoting effects of water removal under various temperatures and pressures by Aspen Plus. It is found that, at medium reaction temperature (e.g., 250 °C), medium pressure (e.g., 10–50 bar), and medium CO fraction (e.g., 0.1–0.5) together with 1-stage water removal, a CO2/CO equilibrium conversion higher than 80 % can be obtained.

Original languageEnglish
Pages (from-to)2386-2394
Number of pages9
JournalChemical Engineering and Technology
Volume46
Issue number11
DOIs
StatePublished - Nov 2023

Keywords

  • CO hydrogenation
  • CO hydrogenation
  • Ethanol synthesis
  • Membrane reactor
  • Thermodynamics

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