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对甲醇制烃反应体系进行了热力学分析,计算了不同温度下各反应的焓变、吉布斯自由能变和反应平衡常数,采用平衡常数联立方程法估算了甲醇转化生成C2-C10烃的热力学平衡组成.计算结果表明:甲醇制烃为强放热反应,1 mol甲醇转化最大放热量约为90 kJ/mol;甲醇制烃体系中除甲醇脱水之外,大部分反应均可视为不可逆过程;高温低压不利于烷烃生成物,有利于芳烃和烯烃生成物.对计算结果与实验结果进行了比较,数据变化趋势较为一致.计算结果表明,甲醇制烃体系不受热力学的控制,催化剂的选择和反应条件的选择至关重要.
The thermodynamic analysis of methanol production was carried out. The enthalpy change, Gibbs free energy change and reaction equilibrium constant of each reaction at different temperatures were calculated. The equilibrium constant simultaneous equations were used to estimate the conversion of methanol to C2-C10 hydrocarbons Thermodynamic equilibrium composition.The calculated results show that methanol production is a strong exothermic reaction and the maximum exothermic heat of methanol conversion is about 90 kJ / mol. In addition to methanol dehydration in methanol production, most of the reactions can be regarded as irreversible Process; high temperature and low pressure is not conducive to alkane products, is conducive to aromatics and olefin products.The calculated results and experimental results were compared, the data trend is more consistent.The results show that the methanol production system is not controlled by the thermodynamics of the catalyst The selection and choice of reaction conditions are of crucial importance.