Catalyst for hydrogenation of co / co2 to methanol and preparation method and application thereof

The CO/CO2 hydrogenation to methanol catalyst prepared by hydrothermal and coprecipitation methods utilizes the confinement effect formed by the cyclopentadienone bisphosphine framework and the auxiliary metal to solve the problem of easy agglomeration and sintering of Cu-based catalysts, thus realizing a highly efficient and stable CO/CO2 hydrogenation to methanol reaction, extending the catalyst lifetime and improving the conversion rate.

CN119281398BActive Publication Date: 2025-11-28NINGBO JINYUANDONG PETROCHEM ENG TECH
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Patent Information

Application Number
CN202411422649.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-11
Publication Date
2025-11-28
Estimated Expiration
2044-10-11

AI Technical Summary

Technical Problem

Existing Cu-based catalysts have problems such as easy agglomeration and sintering of Cu components and phase separation of active components leading to increased selectivity of by-products in the process of CO/CO2 hydrogenation to methanol, making it difficult to achieve efficient and stable industrial applications.

Method used

A CO/CO2 hydrogenation to methanol catalyst was prepared by hydrothermal and coprecipitation methods. The cyclopentadienone bisphosphine framework was used to form a confinement effect to improve the stability of the Cu component. The catalyst component content and active phase were optimized by adding auxiliary metals such as Mg, Al, Zr, and Cr.

Benefits of technology

It significantly extends the catalyst's lifespan, improves its stability and carbon monoxide conversion rate, and achieves a highly efficient CO/CO2 hydrogenation to methanol reaction. The catalyst has a carbon monoxide conversion rate of over 45% at 250℃ and a heat retention rate of over 75%.

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Abstract

The application provides a catalyst for preparing methanol by CO / CO2 hydrogenation and a preparation method thereof. The preparation method takes copper salt, iron salt, functional ligand and auxiliary metal salt as raw materials, adopts a hydrothermal method and a coprecipitation method to obtain a catalyst precursor, and then the catalyst is obtained after drying and calcining the catalyst precursor. In the method, on one hand, the functional ligand forms a unique cyclopentadienone diphosphine framework, and on the other hand, metal auxiliaries are introduced. Both of the two aspects effectively improve the problem that Cu components in the existing Cu-based catalyst are prone to agglomeration and sintering, thereby prolonging the service life of the catalyst.
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