Catalyst with cracking and gasifying function and preparation method thereof

Abstract

The invention relates to a catalyst with cracking and gasifying function, on the basis of the weight of the catalyst, which comprises: 35-60 percent of pseudo-boehmite, 2-10 percent of alumina sol, 20-49.5 percent of kaolin, 5-30 percent of alkali metals and alkaline-earth metals (by oxide), wherein the atomic ratio of the alkali metals to the alkaline-earth metals is (0.05-0.9):1. The catalyst has the optimization effects on the hydrocarbon oil cracking products distribution and the gasification effective gas productivity.

Description

Technical field [0001] The invention relates to a catalyst for the cracking process of heavy and inferior petroleum hydrocarbons and the gasification of coke produced by cracking to produce hydrogen. More specifically, it uses catalytic cracking and thermal cracking processes to process heavy and inferior feedstock oils to produce a certain amount of light It is a catalyst that uses the coke produced to produce hydrogen or syngas to convert the excess carbon of heavy and inferior oil into products with higher added value. Background technique [0002] With the development trend of heavy and degraded crude oil worldwide and the increasingly stringent environmental protection regulations, hydrogenation has become one of the countermeasures. However, the current hydrogen production method has a relatively high production cost, and the output is difficult to meet the needs of hydrogenation. It is very important to develop cheap hydrogen production methods. [0003] At present, the ca...

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Problems solved by technology

[0004] Measures to increase liquid recovery include reducing the temperature of the coking reactor or reducing the residence time of raw materials to reduce excessive cracking. The existing problems are: the concentration of coking precursors in the coking reactor increases, covering the surface of the fluidized medium, and the particles interact with each other. Viscous, the particle size distribution of the particles in the system becomes wider, and the fluidization effect becomes worse

However, in a high-temperature hydrothermal environment above 800 °C, the molecular sieve framework will collapse quickly, and the activity will be permanently lost.

[0006] The amorphous silicon-alumina structure has a certain acidity, but the acidity is not as strong as that of molecular sieves

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