高浓度CO变换气制甲醇问题的探讨及催化剂选型

通过动力学模拟计算和实验研究,对高浓度CO变换气制甲醇工艺中,第一反应器反应深度控制、甲烷化副反应和催化剂选型等问题进行了讨论,结果表明:通过控制反应的水/气和催化剂装量均可达到控制反应深度的目的;降低床层的热点温度,增加水/气和空速均可抑止甲烷化副反应发生;选用强稳定性、抗水合性能和低温活性高的CO耐硫变换催化剂,可以满足高CO浓度变换气对催化剂性能的要求。

Study on Methanol Production from Concentrated CO Shift Gas and the Selection of Catalyst

Through simulated calculation of dynamics and experiments for methanol synthesis from highly concentrated CO shift gas,the control of reaction extent in the first stage reactor,by-reaction of methanation and selection of catalyst were investigated.The results indicate that the reaction depth can be controlled by adjusting the ratio of water/gas and the amount of catalyst,and decreasing the hot point temperature of bed layer and increasing the water/gas ratio and space velocity can restrain the by-reaction of methanation.The sulfur-tolerant catalyst with higher strength stability,anti-hydration and high activity at lower temperature can meet the demands of methanol synthesis from highly concentrated CO shift gas.