Methylcyclohexane (MCH) is regarded as an excellent hydrogen energy carrier due to its reasonable theoretical hydrogen storage content (6.22 wt%) and physicochemical performance. Methylcyclohexane-toluene-hydrogen (MTH) cycle realizes the recycling of materials and energy, and has a good prospect of industrial application. The dehydrogenation process is highly reversible, and the industrial hydrogenation process has been commercialized, while the dehydrogenation process of MCH does not exist and the research on the catalytic dehydrogenation of organic liquid hydride is not comprehensive. The development of dehydrogenation catalysts with good stability, catalytic activity and product selectivity under low temperature and high pressure is the central issue of the industrialization of MTH system. In this paper, introducing the advantages of the MTH system and the current research status of MCH catalytic dehydrogenation. Catalysts were classified as active components and summarized from the aspects of carrier selection, preparation methods and dehydrogenation performance, and the research status of noble metal catalyst and non-noble metal catalyst is emphasized. In addition, the research progress of different carrier effect on catalyst performance is briefly reviewed.

甲基环己烷（MCH）由于其合理的理论储氢含量（6.22 wt%）和理化性能被认为是一种优良的氢能载体。甲基环己烷-甲苯-氢（MTH）循环实现了物质和能源的循环利用，具有良好的工业应用前景。脱氢工艺可逆性强，工业加氢工艺已实现商业化，而MCH的脱氢工艺尚不存在，有机液态氢化物催化脱氢的研究不全面。开发在低温高压下具有良好稳定性、催化活性和产物选择性的脱氢催化剂是MTH系统产业化的核心问题。在本文中，介绍了MTH系统的优点和MCH催化脱氢的研究现状。将催化剂分类为活性组分，从载体选择、制备方法和脱氢性能等方面进行总结，重点介绍了贵金属催化剂和非贵金属催化剂的研究现状。此外，简要回顾了不同载体效应对催化剂性能的研究进展。