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对ＣＯ＋Ｈ２合成醇反应体系进行了化学平衡分析，用最小自由能法计算得到不同温度、压力、合成气Ｖ（Ｈ２）／Ｖ（ＣＯ）比和ＣＯ２含量下的产物平衡组成及ＣＯ、Ｈ２的平衡转化率。ΔＧ°的计算表明，热力学上变换反应和生成烯烃的反应都比合成醇反应容易进行，低温对碳数高的醇生成有利，高温对碳数低的醇生成有利。与实验结果的对比表明，在ＺｎＣｒＫ催化剂上由合成气合成醇，在气相和超临界条件下反应，体系中甲醇合成反应和变换反应均接近化学平衡，生成Ｃ２＋ＯＨ的反应远离化学平衡，产物分布受动力学限制，而非受热力学限制。
Chemical equilibrium analysis was carried out on the reaction system of CO + H2 synthesis alcohol. The product equilibrium composition and the balance of CO and H2 at different temperatures, pressures, syngas V (H2) / V (CO) and CO2 contents were calculated by the minimum free energy method Conversion rate. The calculation of ΔG ° shows that the reactions of thermodynamics up-conversion and olefins formation are easier than that of the synthesis of alcohols. Low temperature is favorable for the formation of alcohols with high carbon number, and high temperature is favorable for the formation of alcohols with low carbon number. The comparison with the experimental results shows that the synthesis of alcohols from syngas on ZnCrK catalyst reacts under gas phase and supercritical conditions. The methanol synthesis reaction and the shift reaction in the system are close to the chemical equilibrium. The reaction of generating C2 + OH is far away from the chemical equilibrium , The product distribution is governed by kinetics, not by thermodynamics.