Dichloromethane catalyst and preparation method thereof

Abstract

The invention discloses a dichloromethane catalyst and a preparation method thereof. The dichloromethane catalyst comprises an alumina coating and a porous substrate; the surface of the porous substrate is coated with the alumina coating; a composite oxide precursor salt solution is impregnated on the porous substrate coated with the alumina coating, and then roasted to form the dichloromethane catalyst; the catalyst is prepared under normal pressure conditions; the solidly bonded alumina coating is prepared from alumina sol; composite oxide with catalytic activity can be formed through impregnating and then roasting the composite oxide precursor salt solution. The preparation method of a solution is simple, only needs the processes of impregnation and roasting, and is suitable for industrial large-scale production and application; the composite oxide formed after roasting of the selected specific composite oxide precursor salt solution has excellent catalytic activity on dichloromethane, and the catalytic conversion rate at 380 DEG C can reach 95% or above.

Description

technical field [0001] The invention relates to the technical field of environmental protection catalysts, in particular to a dichloromethane catalyst and a preparation method thereof. Background technique [0002] Catalytic combustion technology is a major technology for treating VOCs waste gas today. One of its cores is the catalyst, which can significantly reduce the activation energy required for the reaction, making catalytic combustion technology more effective in improving energy utilization efficiency, reducing energy consumption and controlling harmful gas emissions. play an increasingly prominent role. [0003] Dichloromethane (CH 2 Cl 2 ) is widely used in film production and medicine, and is a potential carcinogen to humans. When in contact with open flames or hot objects, highly toxic phosgene can be produced, which has a destructive effect on the environment. It is necessary to treat the waste gas containing methylene chloride. [0004] Dichloromethane wast...

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Problems solved by technology

Patent CN201510369031 provides a dichloromethane catalytic nano-membrane and its preparation method, using Chlorophytum extract mixed with other organic matter, the preparation time is longer and the conditions are higher; patent CN201811329267 prepared a transition metal oxide catalyst catalytic combustion Dichloromethane, when the slurry is synthesized, it needs to be hydrothermally synthesized in a reactor, and it takes a long time; the patent CN201510166386 uses coprecipitation method and impregnation method to prepare a ruthenium titanium zirconium catalyst for the catalytic combustion of dichloromethane , requires cumbersome filtering and washing operations and impregnating precious metals, and the cost is relatively high

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