Co-Generation of C_2 Hydrocarbons and Synthesis Gases from Methane and Carbon Dioxide: a Thermodynamic Analysis

作     者：Istadi Nor Aishah Saidina Amin 

作者机构：Chemical Reaction Engineering Group (CREG) Faculty of Chemical and Natural Resources Engineering Universiti Teknologi Malaysia UTM Skudai Johor 81310 Malaysia Chemical Reaction Engineering Group (CREG) Faculty of Chemical and Natural Resources Engineering Universiti Teknologi Malaysia UTM Skudai Johor 81310 Malaysia 

出 版 物：《Journal of Natural Gas Chemistry》 (天然气化学杂志（英文版）)

年 卷 期：2005年第14卷第3期

页      面：140-150页

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 070303[理学-有机化学] 0703[理学-化学] 

主　　题：thermodynamic chemical equilibrium co-generation synthesis gas C2 hydrocarbons Gibbs free energy CH4 C02 carbon 

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.