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    碳化物催化甲烷干重整制合成气的研究进展

    Research progress in carbonide-catalyzed dry reforming of methane for syngas production

    • 摘要: 甲烷干重整反应将2种主要温室气体CH4和CO2转化为合成气(H2/CO),为利用温室气体资源生产高附加值化学品提供了重要途径。然而,甲烷干重整面临着催化剂表面易积碳和高温反应中易烧结导致失活等挑战。因此,迫切需要寻找一种耐高温、抗积碳和抗烧结的催化剂来提高甲烷干重整的催化活性和稳定性。碳化物因其独特的结构和优越的物理化学特性在电催化、热催化、光热催化等领域被广泛应用,其类铂特性、良好的热稳定性、与氧化剂(CO2和H2O)的良好亲和力以及强金属‒载体相互作用等特点,使碳化物成为提高甲烷干重整反应效率和催化剂寿命的极具潜力的候选材料。综述内容涵盖传统甲烷干重整催化的一般反应机理与反应热力学特性,重点分析了碳化物材料在该过程中的一般反应机理与应用。最后,提出了碳化物材料催化甲烷干重整面临的技术挑战和发展方向。旨在为在开发高效、稳定的碳化物甲烷干重整催化剂体系提供有价值的指导,以促进该领域的科学研究、技术创新和产业化应用。

       

      Abstract: The dry reforming of methane (DRM), converting two primary greenhouse gases, CH4 and CO2, into syngas (H2/CO), offers a pivotal route for valorizing greenhouse gases into high-value-added chemicals. However, DRM confronts challenges such as carbon deposition on the catalyst surface and sintering of active metal particles under high-temperature conditions, leading to deactivation. Consequently, there is an urgent need for a catalyst that is resistant to high temperatures, coke formation, and sintering to enhance the catalytic activity and stability of DRM. Due to their unique structures and superior physicochemical properties, carbides have found widespread application in electrocatalysis, thermal catalysis, and photo-thermal catalysis. Their noble-metal-like (Pt-like) characteristics, excellent thermal stability, good affinity with oxidants (CO2 and H2O), and strong metal-support interactions make carbides promising candidates for boosting the efficiency of the DRM reaction and extending the lifetime of the catalyst. The review covers the general reaction mechanisms and thermodynamic characteristics of conventional DRM catalysis, with a focus on the typical reaction mechanisms and applications of carbide materials in this process. Finally, the technical challenges and future directions for carbide-catalyzed DRM are proposed. The aim is to provide valuable guidance for the development of efficient and stable carbide-based DRM catalyst systems, fostering scientific research, technological innovation, and industrial application in this field.

       

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