Directional reactive catalysis thermal cracking method for direct converting low carbon alkane without need of oxygen

Abstract

A directional catalytic thermocracking reaction for non-oxygen direct conversion of low-carbon alkane includes reaction between the preheated heavy petroleum hydrocarbon and hot cracking catalyst from the first generator in the first reactor to obtain the oil gas and carbon deposited catalyst, stripping the catalyst, regenerating in the first generator, delivering the oil gas in the following product separation system, feeding low-carbon alkane in the second reactor, reacting on the aromatizing catalyst from the second regenerator to obtain arylhydrocarbon and H2, regenerating the catalyst, and separating arylhydrocarbon from H2.

Description

technical field [0001] The invention belongs to a directional reaction catalytic pyrolysis method for the oxygen-free direct conversion of low-carbon alkanes, more specifically, a process method combining the aromatization of low-carbon alkanes and catalytic pyrolysis of hydrocarbon oil. Background technique [0002] For the modern petrochemical industry, ethylene and propylene are the most important basic raw materials. 98% of the world's ethylene production methods are tube furnace steam cracking. Because the temperature of steam cracking is very high and the material requirements are very strict, the overall investment of the device is very high. Moreover, the furnace tube of the cracking furnace is easy to coke, so the raw material selection has to be light oil such as natural gas, naphtha or light diesel oil. raw materials, resulting in higher production costs. [0003] Since crude oil is getting heavier day by day, the sources of light raw materials for steam crackin...

AI Technical Summary

Problems solved by technology

[0012] Nevertheless, the HCC or CPP ethylene technology using heavy oil as raw material still has obvious shortcomings: in the current HCC or CPP product distribution, the methane yield is about 11%, which wastes precious petroleum resources

Therefore, it is difficult to directly utilize methane alone