A preparation method of a sol-gel catalyst for deep removal of a small amount of hydrogen in industrial CO gas

Abstract

The invention discloses a preparation method of a sol-gel catalyst for deeply removing a little H2 in industrial CO synthetic gas through selective oxidation reaction, and a related process. The method comprises the following steps of: dissolving palladium chloride serving as a palladium source in hydrochloric acid solution with certain concentration, and adding aluminum isopropoxide, water and nitric acid in a certain ratio to form sol at a certain temperature; and gelatinizing the sol at a certain temperature to form gel, and drying and roasting at a certain temperature to obtain the required catalyst. The catalyst prepared by the method has the advantages that: active ingredients are uniformly distributed, the using amount of noble metal palladium salt is reduced, reaction conditions are mild, the phenomena of violent heat release and temperature runaway are avoided, the catalyst has superior performance, the H2 in the industrial CO synthetic gas can be removed to be less than 100ppm, and the requirement on the purity of the CO gas in a carbonyl synthesis process can be effectively met.

Description

technical field [0001] The invention relates to a method for deep removal of a small amount of H in industrial CO gas 2 The preparation method of the sol-gel catalyst and the related process. Background technique [0002] In recent years, the preparation of various bulk chemicals such as methanol, olefins, aromatics, formaldehyde, acetic anhydride, paraformaldehyde, dimethyl ether, ethylene glycol, and mixed alcohols has become a domestic and foreign One of the hotspots of research. [0003] Among them, coal-to-ethylene glycol is an emerging technology in the field of coal chemical industry. Combined with the current situation of my country's lack of oil, less gas and relatively rich coal resources, this technology has significant economic and social benefits. The process route mainly has three reaction steps: (1) Coal-to-water gas is separated by pressure swing adsorption to obtain CO raw material gas; (2) CO catalytic coupling is used to synthesize oxalate; (3) oxalate...

AI Technical Summary

Problems solved by technology

[0005] So far, most of the noble metal catalysts are still prepared by impregnating the active components of the noble metal on the carrier, but the catalyst prepared by this method is not evenly loaded , the amount of precious metals is high, and the active components are easy to agglomerate, which virtually increases the production cost of the entire process

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