Catalyst carrier with three-dimensional mesh inert skeleton structure and preparation method of catalyst carrier

Abstract

The invention provides a catalyst carrier with a three-dimensional mesh inert skeleton structure and a preparation method of the catalyst carrier. The carrier comprises a three-dimensional mesh (dense) ceramic skeleton with densely distributed large-pore-diameter pore channels, and large pore diameters of the three-dimensional mesh ceramic skeleton are filled with porous catalytic materials; and the size of the large pore diameters is greater than 50 nm, and the size of porous pore diameters is 0.3-20 nm. The catalyst carrier with the three-dimensional mesh inert skeleton structure and the preparation method of the catalyst carrier have the advantage that the morphology structures and physico-chemical properties of the catalyst are effectively adjusted and controller to improve catalytic performance.

Description

technical field [0001] The present invention relates to a catalyst carrier with a three-dimensional network inert framework structure, and more specifically to a catalyst carrier having a three-dimensional network dense inert framework structure and filled with rich microporous structure (pore diameter 0.3-20nm) active materials Carriers and methods for their preparation. Background technique [0002] The chemical industry is a pillar industry for the development of the national economy. Almost all chemical reactions involve catalytic reactions. In catalytic reactions, a small amount of catalyst can significantly increase the speed of chemical reactions, and the catalyst itself is not consumed. Therefore, in the petroleum, petrochemical, environmental protection and polymer chemical industries, in order to increase product output, increase target product selectivity, and reduce production costs, catalysts are more widely used and used more and more. [0003] Most industrial...

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Problems solved by technology

Therefore, the catalyst will be deactivated due to various factors during the use process, which directly affects the use cost of the catalyst, the production continuity of the chemical plant and the economic benefits of the enterprise.

The main reasons for the deactivation of the catalyst include: first, the active metal in the catalyst will migrate and gradually gather on the surface of the carrier at high temperature, and the metal grains will gradually grow and undergo irreversible structural changes; It is a porous active substance, and after high temperature in the reaction process, it is easy to form local hot spots, resulting in a decrease in carrier strength, a rapid decrease in specific surface area, porosity and pore size distribution, and the collapse of the catalyst; the third is that the raw material has too much water or is in the catalytic process. Excessive water generated in the medium will cause pulverization or fragmentation of the active carrier structure

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