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采用固定床反应器,考察了焙烧温度对HZSM-5酯化活性、选择性及稳定性的影响。实验结果表明,在实验条件下,部分正丁醇在HZSM-5上脱水生成丁烯,但乙醇不生成乙烯。三种丁烯异构体的生成说明在HZSM-5上的脱水是按正碳离子的机理进行的。稳定性的实验结果表明,丁烯的聚合结焦主要是在强酸中心上进行的。在不同温度焙烧的HZSM-5上酯化反应表明,酯化反应既可以在B 酸中心上进行,亦可以在L 酸中心上进行;而乙醚、正丁醚和丁烯主要是在B 酸中心上产生的。
The effect of calcination temperature on the esterification activity, selectivity and stability of HZSM-5 was investigated using a fixed-bed reactor. The experimental results show that under the experimental conditions, part of n-butanol is dehydrated to butene on HZSM-5, but ethanol does not generate ethylene. The formation of three isomers of isomers shows that the dehydration on HZSM-5 is carried out according to the mechanism of f-carbanion. The experimental results of the stability show that the butene coalescence is mainly carried out on the strong acid sites. The esterification reaction on HZSM-5 calcined at different temperatures showed that the esterification reaction could be carried out both on the acid B site and on the L acid site, while the ethyl ether, n-butyl ether and butene were mainly on the acid sites B Produced.