Research progress on organic hydrogen storage compound methylcyclohexane dehydrogenation catalysts
Hydrogen,as an ideal efficient and clean energy,is the primary choice for the transformation of China's energy system to low-carbon.Hydrogen storage and transportation technology is the key to promote the development of hydrogen energy industry,in which the organic liquid hydrogen storage technology has become a research hotspot due to its advantages of high safety and high hydrogen storage density,especially the methylcyclohexane(MCH)-toluene hydrogen storage system,which has demonstrated a good potential for industrial application.The biggest resistance to the development of catalysts for MCH-toluene hydrogen storage system is the lack of stable and efficient catalysts for MCH catalytic dehydrogenation process,and the design of great stability and high selectivity catalysts with low-temperature and high-activity is the key to facilitate the development of the MCH-toluene hydrogen storage system.The advantages of organic liquid hydrogen storage technology,the characteristics of hydrogen storage media and the current research status of MCH dehydrogenation catalysts were reviewed.The MCH dehydrogenation catalysts were classified into noble metal and non-precious metal catalysts according to the rarity of the active metal,and the dehydrogenation performances of MCH dehydrogenation catalysts were summarized and analyzed in terms of the active components,the selection of carriers,and the preparation methods.Future research on MCH dehydrogenation catalysts can start from the following aspects.(1)Extend the lifetime of precious metal catalysts and improve the recovery of precious metal active components.(2)Modify carriers or introduce new active components for non-precious metal dehydrogenation catalysts.(3)Integrate the energy utilization of the whole MCH catalytic dehydrogenation process,and reduce the energy consumption of the dehydrogenation process through the introduction of clean energy-assisted heating.
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