Catalyst for modified carbon dioxide hydrogenation to arenes and method for preparing same

Electron beam irradiation of composite metal oxides and ZSM molecular sieves improved the catalytic performance of carbon dioxide hydrogenation to aromatics catalysts, increased CO2 conversion and aromatics selectivity, solved the problem of low CO inhibition rate in existing catalysts, and can be applied in the fields of carbon neutrality and green electricity and aviation kerosene.

CN122164479APending Publication Date: 2026-06-09STATE POWER INVESTMENT CORPORATION RESEARCH INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE POWER INVESTMENT CORPORATION RESEARCH INSTITUTE
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing catalysts for the hydrogenation of carbon dioxide to aromatics exhibit low CO inhibition rates, and their catalytic activity and CO2 conversion rates need to be improved, while the inhibition of byproducts remains inadequate.

Method used

Electron beam irradiation was applied to composite metal oxides, ZSM molecular sieves, and modified carbon dioxide hydrogenation to aromatics catalysts to optimize catalyst structure and activity, improve the binding force between composite metal oxides and ZSM molecular sieves, and enhance catalytic activity and selectivity.

Benefits of technology

It improves CO2 conversion rate, inhibits the production of byproducts CH4 and CO, enhances aromatic selectivity and CO inhibition rate, and is suitable for carbon neutralization to produce aromatics and green aviation kerosene.

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Abstract

This invention provides a modified catalyst for the hydrogenation of carbon dioxide to aromatics and its preparation method. The preparation method includes: Step S1, sequentially subjecting a salt solution containing metal element A, a salt solution containing metal element B, and a raw material containing a precipitant to a co-precipitation reaction and calcination treatment to obtain a composite metal oxide; Step S2, mixing the composite metal oxide and a ZSM molecular sieve to obtain the modified catalyst for the hydrogenation of carbon dioxide to aromatics; wherein at least one of the composite metal oxide, the ZSM molecular sieve, and the modified catalyst for the hydrogenation of carbon dioxide to aromatics is subjected to electron beam irradiation treatment; metal element A is selected from any one or more of Zn, Fe, Zr, and Al, and metal element B is selected from any one or more of Zn, Cr, Zr, Y, Ca, Mn, Ce, Cu, and Co. The above catalyst can achieve higher CO2 conversion and CO inhibition rates in the catalytic reaction of the hydrogenation of carbon dioxide to aromatics.
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