Low-temperature thermal plasma method for preparing catalyst for preparing low-carbon alcohol from synthesis gas and application

Abstract

The invention provides a method for preparing a catalyst for preparing low-carbon alcohol from synthesis gas by adopting a low-temperature thermal plasma method, and belongs to the field of chemical industry catalyst preparation. According to the specific principle, the method comprises the steps that firstly, low-temperature thermal plasmas are generated; secondly, high-temperature plasma arc treatment is conducted on a mixture of a molybdenum source compound and a cobalt source compound to prepare a catalyst active component; thirdly, alkali metal salt is introduced through an impregnation method, and then the target catalyst is prepared. The target catalyst has the advantages of being high in catalytic activity and alcohol selectivity, long in reaction life and the like in a reaction for preparing low-carbon alcohol from the synthesis gas. The method has the advantages that the preparation process is simple and rapid to operate, and large-scale production is easy.

Description

technical field [0001] The invention relates to the technical field of chemical catalysts, in particular to a catalyst preparation method and reaction conditions for producing low-carbon alcohols from syngas, and in particular to a catalyst prepared by a radio frequency induction low-temperature thermal plasma method. Background technique [0002] Low-carbon mixed alcohol fuel is a polyol mixture mainly composed of methanol or ethanol, mixed with higher alcohols such as methanol or ethanol, propanol, butanol, and pentanol. Low-carbon mixed alcohol is a good vehicle fuel with a high octane number and good blendability with gasoline. It can replace methyl tert-butyl ether (MTBE) as a gasoline additive. It has clean combustion and low pollution The advantages. Therefore, the blending of low-carbon alcohol and gasoline as an alternative fuel has received widespread attention from various countries. In addition, after the separation of low-carbon mixed alcohols, single alcohols...

AI Technical Summary

Problems solved by technology

Non-noble metal-based catalysts are increasingly favored by researchers due to their low cost. However, such catalysts usually obtain mixed alcohols with carbon atoms distributed from C1 to C6, among which methanol has a high selectivity, and C 2+ OH selectivity is low

[0004] In addition to the influence of catalyst composition, the traditional preparation methods of low-carbon alcohol catalysts from syngas (impregnation method, sol-gel method, co-precipitation method, etc.) still have some shortcomings, such as low catalytic activity, easy poisoning, poor mechanical stability, etc.

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