ChemCatChem p. 5098 - 5108 (2020)
Update date:2022-08-17
Topics:
Yoon, Wongeun
Lee, Seungjun
Noh, Yuseong
Park, Seongmin
Kim, Youngmin
Ju Kim, Hyung
Chae, Ho-Jeong
Bae Kim, Won
In this paper, a series of Al?Ti mixed oxides with different Al/Ti ratios are prepared by a simple sol-gel method and they are used as active catalysts for selective dechlorination of dichloromethane to chloromethane. The Al?Ti mixed oxide catalyst with the same molar ratio of Al and Ti shows the highest activity in dechlorination of dichloromethane. The strong and abundant Lewis acid sites in the Al?Ti mixed oxides formed along with Al?O?Ti bondings are responsible for the high catalytic activity toward the selective dechlorination reaction in this work. From a kinetic study, the activation energy of this reaction over the optimum Al?Ti mixed oxide catalyst appears to be 59.4 kJ mol?1 based on Langmuir-Hinshelwood model. The improved catalytic performance suggests that the Al?Ti mixed oxide could be used as the effective catalyst for the highly selective dechlorination of dichloromethane to chloromethane.
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