Wang Bin, Dong Qian, Wang Si-Yao, Li Pei-Ya, Wang Shi-Yuan, Lu Shu-Han, Fang Tao
Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, China.
Engineering Research Center of New Energy System Engineering and Equipment, University of Shaanxi Province, Xi'an, Shaanxi, China.
Front Chem. 2022 Dec 13;10:1081319. doi: 10.3389/fchem.2022.1081319. eCollection 2022.
Liquid organic hydrogen storage with N-ethylcarbazole (NEC) as a carrier is a very promising method. The use of precious metal hydrogenation catalysts restricts the development in industrial grade. Efficient and low-cost hydrogen storage catalysts are essential for its application. In this work, a Ni-Mo alloy catalyst supported by commercial activated carbon was synthesized by impregnation method, and the Ni-Mo ratio and preparation conditions were optimized. The catalyst was characterized by XRD, XPS, H-TPR, SEM, and TEM. The results showed that the doping of Mo could dramatically promote the catalytic hydrogenation of N-ethylcarbazole by the Ni-based catalyst. More than 5.75 wt% hydrogenation could be achieved in 4 h using the Ni-Mo catalyst, and the selectivity of the fully hydrogenated product 12H-NEC could be effectively improved. This result reduces the cost of hydrogenation catalysts by more than 90% and makes liquid organic hydrogen storage a scaled possibility.
以N-乙基咔唑（NEC）为载体的液态有机储氢是一种非常有前景的方法。贵金属加氢催化剂的使用限制了其工业级发展。高效且低成本的储氢催化剂对其应用至关重要。在这项工作中，通过浸渍法合成了由商业活性炭负载的Ni-Mo合金催化剂，并对Ni-Mo比例和制备条件进行了优化。采用XRD、XPS、H-TPR、SEM和TEM对催化剂进行了表征。结果表明，Mo的掺杂可显著促进Ni基催化剂对N-乙基咔唑的催化加氢。使用Ni-Mo催化剂在4小时内可实现超过5.75 wt%的加氢，并且可以有效提高完全氢化产物12H-NEC的选择性。这一结果使加氢催化剂成本降低了90%以上，并使液态有机储氢具有规模化的可能性。
