Preparation method of catalyst for preparing hydrogen from hydrogen sulfide

Abstract

The invention relates to a preparation method of a catalyst for preparing hydrogen from hydrogen sulfide. The preparation method comprises a first step (1) of reacting a pre-precipitating agent aqueous solution and a precipitating agent aqueous solution to form a pre-precipitating turbid solution; a second step (2) of adding a metal salt-water solution into the pre-precipitating turbid solution of the first step (1), a precipitant being formed by a reaction, filtering, washing, drying and calcinating the precipitant to obtain a metal salt oxide; and a third step of (3) performing a sulphur treatment on the metal salt oxide of the second step (2), and thus a product is obtained. Cations of the pre-precipitating agent can form a precipitant with anions of the precipitating agent, wherein the solubility product of the precipitant is larger than that of a precipitant formed by metal ions and the anions of the precipitating agent; the precipitating agent is a material capable of producing materials such as OH<->, CO3 <2-> or -OOCCOO- in water; and the metal is one or more selected from VIB group and VIII group transition metals. The catalyst prepared by the method provided by the invention is a bulk phase catalyst consisting of metal sulfur oxides, is low in cost, and has high catalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for producing hydrogen from hydrogen sulfide. Background technique [0002] Hydrogen sulfide is a highly toxic gas with the smell of rotten eggs, mainly from petroleum processing and low-quality natural gas fields. With the intensification of heavy and inferior crude oil and the exploitation of a large number of inferior natural gas fields, my country's hydrogen sulfide emissions have increased year by year. The traditional method for utilizing hydrogen sulfide is the Claus method, which selectively oxidizes hydrogen sulfide into sulfur and water. In the Claus method, the sulfur element in hydrogen sulfide is converted into sulfur, and the hydrogen element is converted into low-value-added water. Hydrogen is an important raw material that must be used in oil refining, and the demand for hydrogen in refineries is increasing year by year. The traditional method of producing hydrogen is the re...

AI Technical Summary

Problems solved by technology

The patent does not give the preparation method of the catalyst and the influence of the preparation of the catalyst on its catalytic properties

[0007] People such as Fukuda used some metal sulfides such as titanium sulfide, copper sulfide and nickel sulfide as catalysts for the reaction of hydrogen sulfide and carbon monoxide to produce hydrogen (Journal of Catalysts, 49, 379 (1977); and Bulletin of Chemistry for Japan, 51, 150 (1978)), the catalytic activity of the catalyst is not ideal