The Preparation Of VOCs Catalytic Combustion Catalyst And Reaction System Research

With the development of economy, environment pollution has attracted people’s attention, especially for volatile organic compounds. Catalytic combustion method is an effective process method because of its high efficiency, low consumption and without secondary pollution. The traditional granular catalyst is known as its pressure drop is high, heat and electric conduction is poor, molding is hard. Therefore, a structured catalyst with low pressure drop, good heat and electric conduction, easy molding, high activity has attracted research’s attention.In our research, anodic oxidation technology was used for the preparation of plate-type structured support, and it was applied for the VOCs catalyst preparation. In order to prepare Pt catalyst with high dispersion, the traditional impregnation method and the competitive impregnation method were applied for Pt loading. The results show that the competitive impregnation method can make Pt particles to distribute across the anodic alumina film, which provides a possibility for the preparation of catalysts with low Pt loading and high catalytic activity. Finally, the optimal technological condition was obtained. Furthermore, the mechanism of competitive impregnation was also elucidated.In addition, VOCs catalytic combustion reaction system was investigated. The results show that the prepared catalysts have excellent stability and water resistance. However, the chlorine resistance is poor. Reaction kinetics of toluene catalytic combustion was also studied. It can be found that the toluene catalytic combustion accords with L-H reaction model. The reaction was proved as control step according to the experimental and simulative results.