Preparation method of copper-based composite metal catalyst

Abstract

The invention discloses a preparation method of a copper-based composite metal catalyst. The copper-based composite metal catalyst is used in a methanol-water reforming hydrogen production technology.Wherein SBA-15 molecular sieve is used as a carrier, ZnO is used as a cocatalyst, CuO is used as a main catalyst, the activated SBA-15 molecular sieve is activated under the action of a surfactant CTAB; CuO-ZnO / SBA-15 with different active component loading capacities is obtained after copper ions and zinc ions are roasted and oxidized at high temperature, and uniform distribution of metal particles represents more contact active sites, so that excellent catalytic activity is shown. The activated SBA-15 has a large number of micropores and mesopores, the increase of the surface area is beneficial to the local heat dissipation of the catalyst and has very good mechanical properties, and a small amount of metal oxide and silicon dioxide in the molecular sieve increase the thermal stabilityof the whole catalyst. In the methanol steam reforming hydrogen production reaction, under the condition of higher reaction temperature, the catalyst shows high hydrogen selectivity, low carbon monoxide selectivity and longer service life.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for preparing a copper-based composite metal catalyst. Background technique [0002] With the continuous development of social economy, people's demand for primary fossil energy continues to increase, which immediately brings major environmental problems such as greenhouse gases, acid rain, air pollution, and uncontrolled discharge of toxic and hazardous waste. Therefore, there is an urgent need for a green alternative to fossil energy. New energy is not only non-toxic itself, but also the combustion products are non-toxic and harmless. Among many ideal energy sources in recent years, hydrogen is the one with the most potential. [0003] The hydrogen production process of methanol water reforming is currently the main means of producing hydrogen. It has the advantages of simple raw materials (methanol and water) and clean products. It has gradually matured i...

AI Technical Summary

Problems solved by technology

In the existing methanol-water reforming hydrogen production technology, it has been confirmed that copper-based catalysts perform best among many reforming hydrogen production metal catalysts. Among them, copper-zinc-aluminum catalysts are widely used, but due to the disadvantages of low temperature resistance and easy sintering greatly limit its further popularization

At the same time, people combine precious metals such as gold, silver, platinum, palladium and transition metals on one or more carriers as composite metal methanol water reforming hydrogen production catalysts. This type of catalyst has excellent performance in high temperature resistance and service life. Excellent, but its high cost hinders its promotion

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