A series of Mg catalysts supported on SiO₂ were prepared by an incipient wetness impregnation method and tested for gas phase dehydrochlorination of 1,1,2-trichloroethane. It was found that these catalysts were very active and selective for the reaction. The catalytic performance depended on the Mg loading rather than the Mg precursors as the catalysts using Mg(NO₃)₂·6H₂O and MgCl₂·6H₂O as the precursors showed the similar performance. A catalyst containing 10wt.% of Mg showed the best performance with a steady state TCE conversion of 92% and cis-dichloroethene selectivity of 91%. Moreover, characterizations of the catalysts revealed the formation of Cl-containing Mg species on the surface during the reaction. The analyses of the compositions of the stable catalysts under working conditions indicated a Cl/Mg ratio of 1, suggesting that Mg(OH)Cl could be the active sites for the reaction.

中文翻译：

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用于1,1,2-三氯乙烷选择性脱氯化氢的高效Mg（OH）Cl / SiO2催化剂

通过初期湿润浸渍法制备了一系列负载在SiO ₂上的Mg催化剂，并进行了1,2,3-三氯乙烷的气相脱氯化氢测试。发现这些催化剂对反应非常活泼且具有选择性。使用Mg（NO ₃）₂ ·6H ₂ O和MgCl ₂ ·6H ₂作为催化剂，其催化性能取决于Mg的负载量而不是Mg的前体。O作为前体表现出相似的性能。含有10wt。％的Mg的催化剂表现出最好的性能，稳态TCE转化率为92％，顺-二氯乙烯选择性为91％。此外，催化剂的表征揭示了在反应过程中在表面上形成了含Cl的Mg物质。在工作条件下对稳定催化剂组成的分析表明Cl / Mg比为1，表明Mg（OH）Cl可能是反应的活性位点。