Fe-cha catalyst, method for preparing the same, and method for partial oxidation of methane

The Fe-CHA catalyst preparation method solves the problems of low methane conversion rate and difficulty in controlling product selectivity in low-temperature methane partial oxidation, achieving efficient production of methanol and dimethyl ether, simplifying the process and reducing energy consumption.

CN121927673BActive Publication Date: 2026-06-16GANJIANG INNOVATION ACAD CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GANJIANG INNOVATION ACAD CHINESE ACAD OF SCI
Filing Date
2026-03-31
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

In existing technologies, low-temperature partial oxidation of methane suffers from low methane conversion rates and difficulty in controlling oxidation products, making it difficult to efficiently produce high-value products such as methanol and dimethyl ether.

⚗Method used

The Fe-CHA catalyst, with its specific silicon-to-aluminum atomic ratio and iron distribution, combined with steam modification, is used for the partial oxidation of methane, achieving high methane conversion and high selectivity in the production of methanol and dimethyl ether.

🎯Benefits of technology

High methane conversion and high selectivity for methanol and dimethyl ether production were achieved under low-temperature conditions, simplifying the process, reducing energy consumption and improving overall efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of methane partial oxidation technology, specifically to a Fe-CHA catalyst, its preparation method, and a method for methane partial oxidation. The Fe-CHA catalyst has a silicon-to-aluminum atomic ratio of 8-10; the Fe-CHA catalyst... 29 In the Si solid-state NMR, within the chemical shift range of -90 ppm to -120 ppm, there are four resonance peaks with increasing chemical shifts, δ1 to δ4. The normalized peak area of ​​δ1 is 6% ± 1%, that of δ2 is 8% ± 1%, that of δ3 is 11% ± 1%, and that of δ4 is 75% ± 1%. The content of tetrahedral coordination mononuclear Fe is 29%–31%, that of octahedral coordination mononuclear Fe is 47%–49%, and that of oligomeric Fe is 21%–23%. This catalyst, when used for the partial oxidation of methane, can achieve high methane conversion at low temperatures while also exhibiting high selectivity for methanol and dimethyl ether.
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