Publication Date:
2014-09-03
Description:
Thermodynamic analysis of dimethyl ether (DME) and methane synthesis from CO 2 hydrogenation, and dry reforming of methane was performed using Gibbs free energy minimization. The effects of temperature, pressure, and feed composition on conversion, selectivity, and yield were investigated for each process. High pressure, high H 2 /CO 2 ratio, and low temperature favored DME production. The yield of methane during CO 2 methanation increased at lower temperature, higher pressure, and H 2 /CO 2 ratio. The yield of synthesis gas improved at higher temperature. Comparison of the three processes demonstrated that the CO 2 conversion was highest during CO 2 methanation reaction if the fraction of CO 2 mol in the feed was less than 0.3. Above this value in the feed, dry reforming allowed the highest CO 2 conversion. Comparative thermodynamic analysis of dimethyl ether synthesis and methane synthesis from CO 2 hydrogenation reactions as well as dry reforming of methane was performed by Gibbs' free energy minimization. Influences of temperature, pressure, and feed compositions on conversion, yield, and selectivity were evaluated. Based on the results, the optimal process for CO 2 utilization could be predicted.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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