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

Abstract

1,2-Dichloroethanes (EDCs) with different water contents were used as feedstock for the catalytic dehydrochlorination 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.

Lead-Free Antimony-Based Perovskite Nanocrystals as a Fluorescent Nanoprobe for the Turn-On Detection of Trace Water in Organic Solvents

“…However, in certain fields, such as petrochemical engineering, chemical production, and food storage, even minimal amounts of water can be detrimental. For instance, the presence of water in petroleum-based fuels can potentially lead to explosions and cause severe damage to engines and storage facilities. , Likewise, in chemical reactions that require anhydrous conditions, the presence of water can significantly impede the reaction process and greatly impact the reaction rate. , Additionally, water can accelerate the degradation and spoilage of oil-based food products, such as butter and edible oil. , Consequently it is imperative to develop straightforward and effective methods for determining the water content in different matrixes. The Karl Fischer titration method is a well-established technique commonly used for determination of the water content .…”