Catalyst for preparing methyl alcohol from syngas as well as preparation method and application of catalyst

Abstract

The invention relates to a catalyst for preparing methyl alcohol from syngas. The preparation method of the catalyst comprises the following steps: putting a CuO / ZnO / Al2O3 catalyst into a container, adding a rhodium salt solution with the same volume, immersing for 6-48 h, and then drying for 8-16 h at 80-120 DEG C; roasting the obtained product for 3-6 h at 300-400 DEG C to obtain the catalyst comprising 40-65 percent of Cu, 25-40 percent of Zn, 2-20 percent of Al and 0.1-0.2 percent of Rh in molar ratio. The catalyst has the advantages of high activity and good stability.

Description

Technical field

[0001] The invention belongs to a preparation method and application of a catalyst, and specifically relates to a copper-rhodium-based catalyst for preparing methanol from synthesis gas, and a preparation method and application. Background technique

[0002] Methanol is an important basic chemical raw material, and its downstream products are widely used in many fields such as chemical industry, pharmacy, and energy. The production of methanol from synthesis gas is one of the important ways for the efficient and clean utilization of coal. At present, the catalyst for methanol synthesis is mainly CuO / ZnO / Al 2 O 3 The catalyst, Cu as the active center, and ZnO as the carrier, play the role of dispersing Cu species and preventing Cu sintering and loss. At the same time, there is a synergistic effect between Cu and ZnO, which helps to form Cu-Zn active sites for methanol synthesis in the catalyst. . Al 2 O 3 It helps to improve the dispersion and specific surface ar...

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