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| Co-Generation of C2 Hydrocarbons and Synthesis Gases from Methane and Carbon Dioxide： a Thermodynamic Analysis | |
| 引用本文： | Istadi Nor Aishah Saidina Amin. Co-Generation of C2 Hydrocarbons and Synthesis Gases from Methane and Carbon Dioxide： a Thermodynamic Analysis[J]. 天然气化学杂志, 2005, 14(3): 140-150 |
| 作者姓名： | Istadi Nor Aishah Saidina Amin |
| 作者单位： | Chemical Reaction Engineering Group （CREG）, Faculty of Chemical and Natural Resources Engineering, Universiti Teknologi Malaysia, UTM Skudai, Johor, 81310 Malaysia |
| 基金项目： | Acknowledgments The authors would like to express their sincere gratitude to the Ministry of Science, Technology and Innovation （M0STI）, Malaysia for the financial support received under the IRPA Project No 02-02-06-0016 EA099. |
| 摘 要： | This paper deals with thermodynamic chemical equilibrium analysis using the method of direct minimization of Gibbs free energy for all possible CH4 and CO2 reactions. The effects of CO2/CH4 feed ratio, reaction temperature, and system pressure on equilibrium composition, conversion, selectivity and yield were studied. In addition, carbon and no carbon formation regions were also considered at various reaction temperatures and CO2/CH4 feed ratios in the reaction system at equilibrium. It was found that the reaction temperature above 1100 K and CO2/CH4 ratio=1 were favourable for synthesis gas production with H2/CO ratio unity, while carbon dioxide oxidative coupling of methane （CO2 OCM） reaction to produce ethane and ethylene is less favourable thermodynamically. Numerical results indicated that the no carbon formation region was at temperatures above 1000 K and CO2/CH4 ratio larger than 1. |
| 关 键 词： | 甲烷 二氧化碳 合成方法 热动力学 碳氢化合物 |
| 收稿时间： | 2005-08-01 |
| 修稿时间： | 2005-09-08 |
Co-generation of C2 Hydrocarbons and Synthesis Gases from Methaneand Carbon Dioxide: |
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| Istadi,Nor Aishah Saidina Amin. Co-generation of C2 Hydrocarbons and Synthesis Gases from Methaneand Carbon Dioxide:[J]. Journal of Natural Gas Chemistry, 2005, 14(3): 140-150 | |
| Authors: | Istadi Nor Aishah Saidina Amin |
| Abstract: | This paper deals with thermodynamic chemical equilibrium analysis using the method of direct minimization of Gibbs free energy for all possible CH4 and CO2 reactions. The effects of CO2/CH4 feed ratio,reaction temperature,and system pressure on equilibrium composition,conversion,selectivity and yield were studied. In addition,carbon and no carbon formation regions were also considered at various reaction temperatures and CO2/CH4 feed ratios in the reaction system at equilibrium. It was found that the reaction temperature above 1100 K and CO2/CH4 ratio=1 were favourable for synthesis gas production with H2/CO ratio unity,while carbon dioxide oxidative coupling of methane (CO2 OCM) reaction to produce ethane and ethylene is less favourable thermodynamically. Numerical results indicated that the no carbon formation region was at temperatures above 1000 K and CO2/CH4 ratio larger than 1. |
| Keywords: | thermodynamic chemical equilibrium co-generation synthesis gas C2 hydrocarbons Gibbs free energy CH4 CO2 carbon |
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