Method for preparing gasoline blending composition from Fischer-Tropsch synthesis oil-phase product

Abstract

The invention discloses a method for preparing a gasoline blending composition from a Fischer-Tropsch synthesis oil-phase product. The method is characterized by taking the Fischer-Tropsch synthesis oil-phase product as a main raw material, injecting the Fischer-Tropsch synthesis oil-phase product into a fluidized bed reactor after preheating and atomizing the Fischer-Tropsch synthesis oil-phase product, enabling the preheated and atomized Fischer-Tropsch synthesis oil-phase product to be in contact with a low-activity catalyst to carry out cracking reaction, then carrying out aromatization reaction with a high-activity catalyst at a high temperature, and fractionating a generated oil-phase product, thus obtaining high-octane gasoline. The technology disclosed by the invention has the characteristics that a main active component of a catalyst is a molecular sieve with good aromatization performance, chain-like hydrocarbon molecules in the Fischer-Tropsch synthesis oil-phase product arefirstly subjected to the cracking reaction at a lower temperature so as to generate an olefin intermediate, the low temperature is beneficial for reducing the productivity of primary cracking gas, and the yield of gasoline is ensured; then the olefin intermediate is subjected to the aromatization reaction at the high temperature, so that the gasoline quality of a product can be improved; the technology ahs the advantages that the technology is simple, the gasoline yield of the product is high, the octane value is high, and the aromatic hydrocarbon content is high.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for preparing gasoline blending components by catalytic conversion of Fischer-Tropsch synthesis oil phase products. Background technique [0002] With the sustained and rapid development of my country's social economy, the people's economic conditions have been greatly improved, and the number of automobiles is increasing day by day, forming a huge demand for oil products. However, my country's crude oil supply capacity is increasingly stretched, and crude oil imports are increasing year by year. Restricted by the quality of crude oil from self-owned oilfields and import channels, the crude oil processed in my country is becoming increasingly heavy and highly vulcanized. The increase in the use of automobiles has led to increasingly serious environmental pollution problems in our country. The high sulfur content and high olefin content in commercial vehicle gasoline ...

AI Technical Summary

Problems solved by technology

However, under the traditional catalytic cracking reaction conditions where the oil agent is exposed to high temperature, the cracking reaction of the Fischer-Tropsch synthesis oil phase product can only obtain a large amount of gas and olefins (as described in the above-m

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