Catalyst for volatile halocarbon catalytic combustion and its preparation method and use

Abstract

The invention relates to a catalyst for volatile halocarbon catalytic combustion removal and its preparation method and use. Fe, Ni, Cu, Co, V or Mn metal oxide is used as an active ingredient, SBA-15, MCM-41 or ZSM-22 is used as a carrier, through an immersion method, an ion exchange method, a grafting method, a riveting method or a solid phase grinding method, the active ingredient is carried by the carrier, and the catalyst is used for volatile halocarbon catalytic combustion in air. Compared with the existing similar catalyst, the catalyst provided by the invention has the advantages of simple preparation processes, low price, high catalytic activity in the reaction, strong catalysis stability, complete discharge of produced CO2, H2O and halogen hydride after alkali lye absorption treatment and no secondary pollution.

Description

technical field [0001] The invention relates to the treatment of volatile halogenated hydrocarbons, in particular to the preparation and application of a catalyst for the catalytic combustion of volatile halogenated hydrocarbons, which is simple in preparation, low in price, high in catalytic activity, strong in catalytic stability and less in secondary pollution . Background technique [0002] Volatile halogenated hydrocarbons refer to a class of halogen-containing volatile organic hydrocarbons. Volatile halogenated hydrocarbons have the characteristics of high density, low boiling point, low viscosity, and insoluble in water, and are widely used in chemical, pharmaceutical, leather, electronics, dry cleaning and other fields. However, in the process of use, storage, and processing, it is easy to enter the environment if it is not properly managed. Many of the compounds are easily absorbed by the skin and mucous membranes due to their volatility, or are passed through the ...

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Problems solved by technology

Patent CN102416319A (2012) discloses a Cr-Ce composite oxide catalyst prepared by co-precipitation method using chromium nitrate and cerous nitrate as raw materials, which has good catalytic degradation activity and stability for chlorine-containing organic compounds, and CO 2 It has high selectivity with HCl and no by-products such as polychlorinated hydrocarbons, but Cr in the catalyst is toxic and prone to pollution, and Ce is expensive, so it is not conducive to popularization; patent CN103962127 (2014) discloses a method for chlorinated aromatic Hydrocarbon Degraded Sr, Ce, Mg, Al, Fe, Co, Ni, Cu Doped LaMnO 3 The preparation method of catalyst, but this method adopts Ce metal, is expensive, and makes complicated; Patent 103894200A (2014) discloses a kind of Fe, Ni, Cr, Bi or Mn doping three cobalt tetroxide formation catalysts for the degradation of polychlorinated aromatic hydrocarbons The preparation method is used for the low-temperature catalytic combustion elimination of polychlorinated aromatic hydrocarbons, but the application range of this method is small; Velasco et al. The effect of H-ZSM-22 and other molecular sieves on the degradation of dichloroethane and trichlorethylene, and found that the range of HX and HY microporous molecular sieve catalysts to remove poisons is limited, and the activity is low

[0005] Among the above catalysts used for the catalytic combustion of halide-containing pollutants, metal oxides represented by Cr are toxic and prone to environmental risks; microporous molecular sieve catalysts such as HX and HY have a limited range of removal of poisons, and their activity is relatively low. Low; metal Ce is more expensive because it is a rare earth element, which limits its application