Catalytic cracking regeneration flue gas combustion-supporting catalyst and preparation method

Abstract

The invention relates to a catalytic cracking regeneration flue gas combustion-supporting catalyst and a preparation method, which is characterized in that an aqueous solution of a precious metal precursor salt is mixed with polymethyl methacrylate microspheres to obtain a mixed solution, the mixed solution is introduced in a gas film reduction apparatus reactor, hydrogen is input, a reducing agent is prepared to a solution, and is introduced in the membrane reactor and is mixed with the mixed solution, precious metal particles are uniformly carried on the surface of the polymethyl methacrylate microspheres; a polymethyl methacrylate microspheres emulsion carried with the precious metal particles is placed in a centrifuge tube for centrifuging to obtain a tightly accumulated colloid crystal template; a metal component nitrate is dissolved by glycol and methanol to obtain a catalyst precursor solution; and the obtained colloid crystal template is dipped, dried and performed with constant temperature roasting by the obtained precursor solution to obtain the catalyst. The catalyst is in favor of dispersing catalytic cracking regeneration flue gas adsorption carbon in pore channels, increasing the utilization rate of active surface area of the catalyst, and greatly reducing the combustion temperature of adsorption carbon and CO.

Description

technical field [0001] The invention relates to a catalytic cracking regenerated flue gas combustion-supporting catalyst and a preparation method thereof. Background technique [0002] Improve the activity of the catalyst used for adsorption carbon purification in the discharged catalytic cracking regenerated flue gas, and reduce the combustion temperature of the adsorption carbon. Since the elimination reaction of carbon particles is a gas-solid (soot)-solid (catalyst) three-phase complex deep oxidation reaction process, the improvement of catalyst activity is not only closely related to the redox performance of the catalyst itself, but also to the solid catalyst and The degree of exposure to PM is closely related. For catalysts with the same active component, the higher the contact ability with soot, the better the activity. However, due to the large particle size of the adsorbed carbon (the diameter of a single soot particle is greater than 25nm), it is difficult to ent...

AI Technical Summary

Problems solved by technology

For example, problem one, the preparation process can easily destroy the structure of the existing three-dimensional ordered macroporous oxide

The second problem is that noble metal particles are not easy to be evenly loaded on the inner surface of the macroporous carrier, which makes the distribution of noble metal particles inside and outside the bulk catalyst uneven, which affects the evaluation of catalytic activity

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