The investigation of dehydrogenation catalysts to achieve rapidly hydrogen release of Liquid Organic Hydrogen Carriers (LOHCs) are of crucial importance for large-scale applications. The catalyst supports with bulk surface area and decent acid-base nature is a key parameter for catalyst to improve its catalytic performance as well as reduce precious metal dosage. Herein, alumina was chosen as a support for Pd loading and prepared through hydrothermal route at different temperatures. The morphology and surface acid property of the alumina supports were investigated in detail. The results revealed that the hydrothermal temperature had a closely effect on the morphology, surface acidity and specific surface area of alumina, resulting in a further impact on Pd dispersion and particle size associated tightly with catalytic activity of Pd/Al₂O₃. The catalyst with 1 wt% Pd loaded on alumina carrier prepared via hydrothermal treatment at 120 °C showed the best catalytic performance for dehydrogenation of perhydro-N-propylcarbazole (12H-NPCZ). Full dehydrogenation with 100% conversion to N-propylcarbazole (NPCZ) could be achieved after 360 min at 180 °C and 101 kPa, which is higher than that of commercial 5 wt% Pd/Al₂O₃ catalyst. The catalyst has potential commercial application value in large-scale application of LOHC technology.

为了快速释放液态有机氢载体（LOHC）的氢而进行的脱氢催化剂的研究对于大规模应用至关重要。具有大的表面积和适当的酸碱性质的催化剂载体是催化剂提高其催化性能以及减少贵金属用量的关键参数。在此，选择氧化铝作为Pd负载的载体，并通过水热法在不同温度下制备。详细研究了氧化铝载体的形貌和表面酸性质。结果表明，水热温度对氧化铝的形貌，表面酸度和比表面积有着密切的影响，从而进一步影响了钯的分散和粒径，与钯/铝的催化活性紧密相关。₂ O ₃。通过120℃水热处理制备的载于氧化铝载体上的Pd含量为1 wt％的催化剂显示出对全氢N-丙基咔唑（12H-NPCZ）脱氢的最佳催化性能。在180°C和101 kPa下360分钟后，可以实现100％转化为N-丙基咔唑（NPCZ）的完全脱氢，这比商用5 wt％Pd / Al ₂ O ₃催化剂要高。该催化剂在LOHC技术的大规模应用中具有潜在的商业应用价值。