Catalyst for preparation of natural gas from coal and preparation method thereof

Abstract

The invention belongs to the technical field of a coal catalytic gasification catalyst and provides a method for preparing an alkali metal salt into an efficient coal catalytic gasification catalyst and an application thereof. According to the catalyst, the wetting property of a coal particle surface is improved by taking the alkali metal salt as a precursor of the catalyst, adding a surfactant and utilizing hydrophilic-hydrophobic structure characteristics of the surfactant component; effective metal components are uniformly supported on a coal base through a conventional soaking method; and the effective components are dispersed in an atomic scale. The catalyst prepared by the invention is applied to a fixed bed reactor for preparation of natural gas from coal through catalytic gasification, not only can a rate of converting coal into a gas phase product be enhanced, but also compositions of coal gas can be adjusted, the methane content is increased and the utilization rate of the coal is greatly improved.

Description

technical field [0001] The invention relates to a catalyst, its preparation method and application, in particular to a catalyst for coal catalytic gasification, its preparation method and application. Background technique [0002] China's energy structure is characterized by more coal and less gas. Coal plays an extremely important role in the development of my country's national economy. However, with the development of the economy and the improvement of people's living standards, coal is directly used as fuel, which not only has low energy efficiency, but also emits a lot of energy. The gas increases the PM2.5 content in the air, causing the environment to be endangered. Using coal gasification technology to convert coal into gas fuel is an important way for clean and efficient utilization of coal. Use coal gasification technology to convert coal into synthesis gas, and then use synthesis gas to produce ammonia, methanol and other important chemical products. The industri...

AI Technical Summary

Problems solved by technology

[0005] The present invention is based on the fact that the surface of coal contains a large number of hydrophobic groups, and the wettability of the catalyst solution to the surface of coal particles is not ideal, which leads to the disadvantages that the catalyst components cannot be effectively dispersed on the coal-based materials in the existing coal catalytic gasification catalyst preparation process, etc., and provides A kind of inherent structural characteristics of a class of organic compounds composed of hydrophilic polar groups and hydrophobic non-polar groups in surfactant components is proposed in order to improve the wettability of coal particle surfaces. The method of simply and quickly distributing the catalyst components on the coal-based material greatly accelerates the sample preparation process, and avoids the problem that the conventional mechanical method and impregnation method cannot uniformly mix the catalyst and the coal-based material effectively

Images