Method for preparing liquid fuel coproduced low carbon olefin by directly converting catalyst and synthetic gas

Abstract

The invention belongs to preparation of liquid fuel coproduced low carbon olefin by synthetic gas and particularly relates to a method for preparing the liquid fuel coproduced low carbon olefin by directly converting a catalyst and the synthetic gas. The synthetic gas is used as a reaction raw material and reacts on a fixed bed or a movable bed, wherein the catalyst is prepared from a component Aand a component B; the component A is metal oxide; the component B is a molecular sieve with an AEL structure or one or more of molecular sieves which are modified by metal and have the AEL structures; the space between geometric centers of catalyst A particles and catalyst B particles is between 2nm and 20mm; the weight ratio of the catalyst A to the catalyst B is 0.1 to 20. The pressure of the synthetic gas is 0.1 to 6MPa, the reaction temperature is 300 to 600DEG C, and the air speed is 500 to 8000h<-1>. Gasoline with high octane number is mainly produced by reacting, and low carbon olefinis coproduced; methane as a byproduct has low selectivity (smaller than 10 percent); the method has a good application prospect.

Description

technical field [0001] The invention belongs to the co-production of low-carbon olefins by preparing liquid fuels from synthesis gas, and in particular relates to a method for producing liquid fuels and co-production of low-carbon olefins by direct conversion of a catalyst and synthesis gas. Background technique [0002] With the development of the economy and the improvement of living standards, the demand for liquid fuels and chemicals has also increased sharply year by year. Gasoline is currently produced mainly by catalytic reforming of heavy naphtha. With the increasing consumption of global oil resources and the high price of crude oil, especially for my country, which is short of oil resources, more than 60% of its annual oil consumption depends on imports. It is necessary to seek an alternative process route, develop and utilize coal The method of preparing low-carbon olefins from non-oil-based carbon resources such as biomass and biomass has important social and str...

AI Technical Summary

Problems solved by technology

The hydrocarbon products of the whole reaction have a wide distribution of carbon atoms, and the selectivity of the target product is low, such as the selectivity of gasoline is lower than 50%.

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