1,1,2-Trichloroethane (1,1,2-TCE) is a chemical raw material that could be used for cracking to produce 1,2-dichloroethylene (1,2-DCE) and 1,1-dichloroethylene (VDC). 1,1-Dichloroethylene had a wide range of industrial applications and was a raw material for various chemical products, such as refrigerant difluorochloroethane, lithium-ion battery adhesives, and high-barrier materials. There was a certain research foundation for catalysts for the catalytic cracking of 1,1,2-trichloroethane. The different acidities and alkalinities of catalysts corresponded to different product distributions. Overall, there had been extensive research on the distribution of three isomeric products, but there were few reports on the study of other residual products, which hindered further understanding of the reaction mechanism. Therefore, it was necessary to study the in situ reaction process, which could examine the real-time catalytic performance of the catalysts and reveal the mechanism of the residual reactions. Mass spectrometry was used to study the residual products such as chloroacetylene and vinyl chloride generated by the system. In this paper, the product changes of the 1,1,2-trichloroethane in situ catalytic cracking reaction during the heating process were investigated. The results indicated that alumina-supported cesium-based catalysts had stronger selectivity for chloroacetylene, up to 10.46%, while alumina-supported barium-based catalysts had stronger selectivity for vinyl chloride, up to 3.86%. Cesium-based catalysts would lower the energy barrier for reactions to occur, allowing dichloroethylene, chloroacetylene, and vinyl chloride to form at lower temperatures. The generation temperature of dichloroethylene, chloroacetylene, and vinyl chloride in barium-based catalysts was higher. The experimental results revealed the changes in functional groups and product distribution of different catalysts during the in situ heating process, providing a theoretical basis for further catalyst redesign and inhibition of residual reactions.

中文翻译：

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原位反应与质谱联用技术研究Cs/Al2O3和Ba/Al2O3在1,1,2-三氯乙烷脱氯化氢反应中的催化性能


1,1,2-三氯乙烷（1,1,2-TCE）是一种化工原料，可用于裂解生产1,2-二氯乙烯（1,2-DCE）和1,1-二氯乙烯（VDC） 。 1,1-二氯乙烯具有广泛的工业用途，是多种化工产品的原料，如制冷剂二氟氯乙烷、锂离子电池粘合剂、高阻隔材料等。 1,1,2-三氯乙烷催化裂化催化剂具有一定的研究基础。催化剂的不同酸度和碱度对应于不同的产物分布。总体而言，人们对三种异构产物的分布进行了广泛的研究，但对其他残留产物的研究报道很少，这阻碍了对反应机理的进一步了解。因此，有必要研究原位反应过程，以实时检测催化剂的催化性能并揭示残留反应的机理。采用质谱法研究了系统产生的氯乙炔和氯乙烯等残留产物。本文研究了1,1,2-三氯乙烷原位催化裂化反应在加热过程中的产物变化。结果表明，氧化铝负载铯基催化剂对氯乙炔具有较强的选择性，可达10.46%，而氧化铝负载钡基催化剂对氯乙烯具有较强的选择性，可达3.86%。铯基催化剂可以降低发生反应的能垒，从而允许在较低温度下形成二氯乙烯、氯乙炔和氯乙烯。 钡基催化剂中二氯乙烯、氯乙炔和氯乙烯的生成温度较高。实验结果揭示了不同催化剂在原位加热过程中官能团和产物分布的变化，为进一步催化剂重新设计和抑制残留反应提供了理论依据。