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Pretreatment Effect on the Properties of the Cr-Mg Catalyst for the Gas-Phase Hydrofluorination of Perchloroethylene into Pentafluoroethane

机译:对氯乙烯加入五氟乙烷的气相氢化的Cr-Mg催化剂的预处理作用

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摘要

The effect of the temperature of thermal pretreatment of the precursors of the Cr-Mg catalyst on its physicochemical properties (specific surface area and elemental composition) and catalytic properties has been experimentally investigated. The dehydration of the precursor takes place up to a temperature of similar to 500 degrees C, making it possible to tune the catalyst composition by varying the heat-treatment temperature. The samples prepared from precursors with various compositions differ in their specific surface area and catalytic activity. The highest activity is shown by the catalyst prepared by heat treatment of the precursor at 330 degrees C.
机译:通过实验研究了CR-Mg催化剂前体的热预处理的温度对其物理化学性质(比表面积和元素组成)和催化性质的影响。 前体的脱水发生高达500℃的温度,使得可以通过改变热处理温度来调谐催化剂组合物。 用各种组合物制备的样品在其特异性表面积和催化活性方面不同。 通过在330℃下通过前体的热处理制备的催化剂显示最高活性。

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