Steam Stripping-Coupled Cycle for Thermodynamic Optimization and Carbon Cycle Intensification in CO/CO2Mixed-Gas Hydrogenation Methanol Synthesis
Yu X. Gao Y. Zhou G. Chi S. Wang C. Tan C. Burkitbayev A. Yan J. Zhao X.
9 September 2025American Chemical Society
ACS Omega
2025#10Issue 3540477 - 40491 pp.
Methanol synthesis, a crucial platform chemical and clean energy carrier, plays a significant role in the global energy transition. This study focuses on thermodynamic optimization and carbon cycle intensification of the CO/CO2hydrogenation process. A multidimensional reaction system model was developed to investigate the effects of the CO/CO2feed ratio, H2/COxmolar ratio, reaction temperature and pressure, catalyst efficiency, and gas–liquid mass transfer resistance on product distribution. To improve carbon utilization, an innovative steam stripping-coupled cycle process was proposed, enabling efficient recovery of dissolved CO2in the liquid phase through phase equilibrium regulation. This reduced the CO2content from 10.72 kmol·h–1before stripping to 1.69 × 10–4kmol·h–1after stripping. Under optimized operating conditions, the methanol yield reached 82.0%, and the single-pass yields of CO and CO2were 90.7% and 72.6%, respectively. After the novel stripping cycle was adopted, the loss of liquid-phase CO2became negligible, with carbon and hydrogen losses mainly caused by gas-phase relaxation. When the relaxation rate was set to 1.0%, the utilization of COxand H2reached 93.2% and 82.8%, respectively. This strategy established a dynamic reaction-separation-recycle balance, improving both resource efficiency and economic performance, and offering theoretical and technical guidance for green methanol industrialization.
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School of Thermal Engineering, Shandong Jianzhu University, Shandong, Jinan, 250101, China
Ecological and Environmental Monitoring Center, Shandong Province Jinan, Jinan, 250101, China
Shandong Electric Power Engineering Consulting Institute Corp, Ltd, Jinan, 250013, China
Institutes for Future Transport and Cities, Coventry University, Coventry, CV1 5FB, United Kingdom
German-Kazakh Institute of Sustainable Engineering, Yessenov University, Aktay, 130000, Kazakhstan
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Energy and Environmental Institute, University of Hull, Hull, HU6 7RX, United Kingdom
School of Thermal Engineering
Ecological and Environmental Monitoring Center
Shandong Electric Power Engineering Consulting Institute Corp
Institutes for Future Transport and Cities
German-Kazakh Institute of Sustainable Engineering
School of Mechanical Engineering
Energy and Environmental Institute
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