Activated carbon coating/foam silicon carbide structural catalyst and preparation method thereof

Abstract

The invention relates to the field of structural catalysts, in particular to an activated carbon coating / foam silicon carbide catalyst with a three-dimensional communicated structure and a preparation method for the catalyst. The invention aims to solve the problems that hole opening is discontinuous, the catalyst and reaction products are separated, a heat transfer and mass transfer effect is poor and the like in the prior art. By taking foam silicon carbide as a catalyst carrier, an activated carbon coating covers on the surface of the foam silicon carbide, wherein the activated carbon coating is between 0.1 micron and 500 microns thick, and a metal catalysis active component is loaded on the activated carbon coating. The activated carbon coating is prepared on the surface of the foam silicon carbide with the three-dimensional communicated structure, then, the metal catalysis active component is loaded, and activating treatment is performed on the metal catalysis active component to obtain the catalyst. According to the activated carbon coating / foam silicon carbide catalyst, holes in the catalyst carrier are totally communicated, thus, an enclosure space does not exist, and a heat transfer and mass transfer process of the chemical reaction can be strengthened. The activated carbon coating / foam silicon carbide catalyst has the characteristics that the temperature field distribution of the catalytic reaction is uniform, the heat inactivation rate is low, the pressure drop is low and the like.

Description

technical field [0001] The invention relates to the field of structural catalysts, in particular to an "activated carbon coating / foamed silicon carbide" catalyst with a three-dimensional connected structure and a preparation method thereof. Background technique [0002] Activated carbon has the characteristics of large specific surface area, unique pore structure, stable surface chemical functional groups, resistance to acid and alkali corrosion, and hydrophobicity. Therefore, it is an excellent adsorbent, catalyst and catalyst carrier, and is widely used in the fields of chemical industry and environmental protection. [0003] The research, production and application of activated carbon have developed rapidly. At present, it is widely used in the form of powder, granular activated carbon and activated carbon fiber. The above-mentioned activated carbon has the following disadvantages in the application: ① The thermal conductivity of activated carbon itself is low, and it can...

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Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a "activated carbon coating / foamed silicon carbide" catalyst with a three-dimensional interconnected structure and its preparation method, which solves the problems of discontinuous openings, Separation of catalyst and reaction product, poor heat and mass transfer effect, etc.

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