Effect of Trace Water on the 1,2-Dichloroethane Cracking over Zeolite Catalysts

1,2-Dichloroethanes (EDCs) with different water contents were used as feedstock for the catalytic dehydrochlori-nation of 1,2-dichloroethane to produce a vinyl chloride monomer (VCM) reaction using zeolite catalysts. It was found that the presence of trace water had a significant negative impact on both the activity and stability of zeolite catalysts for the 1,2-dichloroethane catalytic cracking reaction. Various characterization tools and theoretical calculations confirm that the presence of trace water affects the active center of the zeolite and enhances the adsorption of VCM and EDC, resulting in the deactivation of the zeolite catalyst. This study provides useful ideas for the development of practical catalysts and the stable operation of industrial EDC catalytic cracking processes.

Automated summary

This study found that the presence of trace water has a significant negative impact on the activity and stability of zeolite catalysts for the catalytic cracking of 1,2-dichloroethane. It was determined through various characterization tools and theoretical calculations that the presence of trace water affects the active center of zeolite and enhances the adsorption of VCM and EDC, leading to the deactivation of the zeolite catalyst.