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Research progress on carbon materials in CH4-CO2 reforming

2022 No. 12
576
271
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Authors:
GUO Shuowen
SUN Yinghui
LI Ying
XU Tong
ZHANG Guojie
ZHANG Yongfa
BAI Jie
Unit:
College of Chemical Engineering,Inner Mongolia University of Technology;State Key Laboratory of Clean and Efficient Utilization of Coal Energy,Taiyuan University of Technology
Abstract:

In dual carbon era, carbon dioxide emission reduction and conversion projects have been a current research hotspot. Methane carbon dioxide reforming is a catalytically induced syngas production process that utilizes both greenhouse gases simultaneously and converts them into syngas (carbon monoxide and hydrogen). The syngas produced by this reaction can be synthesized by Fischer-Tropsch to solve the inherent storage and transportation problems of gaseous fuels. Among the raw materials for the methane-carbon dioxide reforming reaction, the methane molecule has a regular tetrahedral configuration, which is not easy to decompose. Carbon dioxide is the smallest non-polar molecule, and high energy is required for C=O bond cleavage. Therefore, the methane carbon dioxide reforming reaction requires catalyst,and the use of inexpensive catalysts for reforming reactions that maximize synthesis gas production has been a focus of research. Non-precious metals are the best choices in current catalytic materials, but they cannot combine the activity and stability of catalysts. Different from metal catalysts, carbon materials have well-developed pore structures and some biomass materials contain rich functional groups, which can improve the adsorption and activation of reactive gases, and can also disperse and fix active metals, thereby improving the stability and anti-cokingability of catalysts. The application of carbon materials in CH4-CO2 reforming reaction was summarized, and the mechanism of different carbon materials in improving the anti-sintering and anti-coking properties of catalysts was analyzed. The activity of carbon material alone as a catalyst is not ideal, and the use of carbon material as a carrier or modification of carbon material can improve the catalytic performance of carbon material catalyst. When the carbon material is used as a carrier, the structural properties of the carbon material can be combined with the high activity of the metal by loading active metals and additives, and the activity and stability of the catalyst can be improved at the same time. Carbon material modification is to enrich the surface structure of carbon materials and optimize the physical properties of carbon materials through different chemical reagents and methods. Heteroatom doping modification can improve the catalytic performance of carbonaceous catalysts by expanding the pore advantage of carbon materials and increasing the content of functional groups on the surface of carbon materials. Combining these two methods to obtain a modified carbon material carrier is the latest research stage of carbon material catalyst, which is not only conducive to metal dispersion and anchoring, but also improves the adsorption and activation rate of the carrier and the reaction gases. The review can provide a reference for the research direction of catalytic methane dry reforming and the use of carbon catalysts.

Keywords:
methane
carbon dioxide(CO2)
reforming
carbon material
modified carbon material
carbon conversion
CO2 utilization
Citation format:
郭硕闻(1998—),女,山西介休人,硕士研究生。E-mail:GSWguoshuowen@163.com
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About Journal

  • Executive director

    China Coal Science and Industry Group Co., Ltd

  • Sponsored by

    Coal Science Research Institute Co., Ltd
    Coal Industry Clean Coal Engineering
    Technology Research Center

  • Editor in Chief

    XIE Qiang

  • Vice Editor-in-Chief

    YU Chang
    SHI Yixiang
    ZHAO Yongchun
    DUAN Linbo
    CAO Jingpei
    ZENG Jie

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