合成气合成低碳醇热力学及试验研究

Thermodynamics and experimental study of alcohol prepared by synthesis gas

为了解决液体燃料缺乏以及农业废弃物处置的问题,该文分析了合成低碳醇的重要性,提供了一条解决农业废弃物的方法,并通过热力学分析指导低碳醇的合成。文中使用平衡常数法对合成气合成低碳醇进行热力学分析计算,并验证了计算结果符合理论分析的趋势,得到降低温度、提高压力有利于CO的转化和醇类的生成,以及不同H2/CO摩尔比的情况下CO转化率,同时通过开发一种新型催化剂,使低碳醇的收率大幅度提高,并通过试验数据验证了理论分析的正确性。最终确定了较佳工艺条件:压力5.5MPa,温度350℃,空速6000h-1,产率0.172,为将来的低碳醇合成的工业化提供了技术指导。

To solve the problems of liquid fuel laced and agricultural waste disposal, first Cl-C5 alcohols which were very important in practical application were analyzed, the way to solve agricultural waste was provided, and the thermodynamic analysis for the synthesis of Cl-C5 alcohols could guide the experiment in praxis. The equilibrium constants were used to analyze the thermodynamic of the synthesis of Cl-C5 alcohols, and the calculation results in line with the trends of theoretical analysis was verified. Reducing temperature and raising pressure were useful for CO conversion and the generation of Cl-C5 alcohols, as well as different molar ratios of H2/CO influenced CO conversion rate. A new type of catalyst was developed, which could increase the yield of alcohols. Then the correctness of theoretical analysis was verified by the experimental data. Eventually the optimum condition was confirmed： pressure was 5.5 MPa, temperature was 350℃, airspeed was 6 000 h-1, yield was 0.172. The results can provide technical guidance for the coming industrialization