Thermodynamic analysis on the CO2 conversion processes of methane dry reforming for hydrogen production and CO2 hydrogenation to dimethyl ether

1st International Global on Renewable Energy and Development

He, Xinyi^1 ; Liu, Liping^2

School of Chemical Engineering and Technology, Tianjin University, Tianjin

300072, China^1

School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou

450001, China^2

关键词: Catalytic technology;    Dry reforming-of-methane;    Equilibrium conversion;    Gibbs free energy minimization;    Methane dry reforming;    Raw material composition;    Reaction temperature;    Thermo dynamic analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/100/1/012078/pdf
DOI  :  10.1088/1755-1315/100/1/012078

来源: IOP

【 摘 要 】

Based on the principle of Gibbs free energy minimization, the thermodynamic analysis on the CO2conversion processes of dry reforming of methane for H2and CO2hydrogenation to dimethyl ether was carried out. The composition of the reaction system was determined on the basis of reaction mechanism. The effects of reaction temperature, pressure and raw material composition on the equilibrium conversion and the selectivity of products were analyzed. The results show that high temperature, low pressure, CO2/CH4molar ratio of 1.0-1.5 and appropriate amount of oxygen are beneficial to the dry reforming of methane. For CO2hydrogenation to dimethyl ether, low temperature, high pressure, the appropriate H2/CO2and the proper CO addition in feed are favorable. The calculated results are compared with the relevant studies, indicating that industrial catalytic technology needs further improvement.