Preparation method for preparing synthesis gas through iron-catalyzed methane dry reforming

The Fe/Al2O3 catalyst prepared by the equal-volume impregnation method solves the problems of easy catalyst deactivation and high energy consumption in the existing methane dry reforming technology, and realizes low-cost and high-efficiency conversion of methane and carbon dioxide to generate syngas with a suitable ratio of CO and H2, which is suitable for the chemical industry.

CN121361768APending Publication Date: 2026-01-20SHANDONG PETROCHEMICAL INST
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Patent Information

Application Number
CN202511637946.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-10
Publication Date
2026-01-20

AI Technical Summary

Technical Problem

Existing dry reforming technologies for methane suffer from high catalyst costs, easy deactivation, high reaction energy consumption, numerous side reactions, and difficulties in activating methane and carbon dioxide, resulting in imprecise control of the syngas product ratio and low resource utilization efficiency.

Method used

Fe/Al2O3 catalysts were prepared by equal-volume impregnation. Highly dispersed metallic iron active sites were formed through heat treatment and hydrogen reduction, enabling efficient conversion of methane and carbon dioxide at ambient pressure and low temperature to generate syngas composed of CO and H2.

Benefits of technology

The catalyst has low cost, high stability and good resistance to carbon deposition, making it suitable for green chemical industry and carbon resource utilization. The ratio of CO to H2 in the generated synthesis gas is close to 1:1, making it suitable for methanol synthesis and Fischer-Tropsch synthesis.

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Abstract

The invention belongs to the technical field of energy chemical industry and catalysis, and discloses a preparation method for preparing synthesis gas through iron-catalyzed methane dry reforming. According to the method, gamma-aluminum oxide is taken as a carrier, ferric nitrate is loaded by adopting an equivalent-volume impregnation method, an iron oxide catalyst is formed through drying and roasting, and metal iron active sites with high dispersity are obtained through hydrogen reduction. The reaction is carried out in a fixed bed reactor, the reaction temperature is controlled to be 650-700 DEG C, methane and carbon dioxide are mixed according to the volume ratio of 1: 1 and introduced into the reactor under the normal pressure condition, and efficient dry reforming is realized to generate synthesis gas. According to the method, the methane conversion rate can reach 85% or above, and the carbon dioxide conversion rate can reach 90% or above. Compared with the existing noble metal or nickel-based catalytic system, the catalyst disclosed by the invention has the advantages of cheap raw materials, simple and convenient preparation process, excellent carbon deposition resistance, capability of keeping high activity and stability at lower temperature, low energy consumption, low cost, strong environmental protection property and suitability for industrial amplification.
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