Wang Ye, Wang Yannan, Li Li, Cui Chaojun, Liu Xudong, Da Costa Patrick, Hu Changwei
College of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China.
Sorbonne Université, Institut Jean Le Rond d'Alembert, CNRS, 2 Place de la Gare de Ceinture, Saint-Cyr-L'Ecole 78210, France.
ACS Omega. 2021 Aug 18;6(34):22383-22394. doi: 10.1021/acsomega.1c03174. eCollection 2021 Aug 31.
CO reforming of methane was studied at medium temperature (700 °C) using a GSHV of 48,000 h over nickel catalysts supported on ZrO promoted by alumina. The catalysts were prepared by a one-step synthesis method and characterized by BET, H-TPR, XRD, XPS, TEM, Raman spectroscopy, and TGA. The NiO-10AlO-ZrO catalyst exhibited higher catalytic performance in comparison with the NiO-ZrO catalyst. The enhancement of catalytic activity in dry reforming could be associated with the alterations in surface properties due to Al promotion. First, the Al promoter could modify the structure of ZrO, leading to an increase of its pore volume and pore diameter. Second, the NiO-10AlO-ZrO catalyst exhibited high resistance to sintering. Third, the NiO-10AlO-ZrO catalyst showed high suppression to the loss of nickel during a long-term catalytic test. Finally, the addition of Al could inhibit the reduction of ZrO during the reduction and reaction, endowing further the stability.
在中温（700°C）下，使用48,000 h⁻¹的气体时空速（GHSV），对负载在氧化铝促进的ZrO₂上的镍催化剂进行了甲烷的CO重整研究。催化剂采用一步合成法制备，并通过BET、H-TPR、XRD、XPS、TEM、拉曼光谱和TGA进行表征。与NiO-ZrO₂催化剂相比，NiO-10Al₂O₃-ZrO₂催化剂表现出更高的催化性能。干重整中催化活性的提高可能与Al促进导致的表面性质变化有关。首先，Al促进剂可以改变ZrO₂的结构，导致其孔体积和孔径增加。其次，NiO-10Al₂O₃-ZrO₂催化剂表现出高抗烧结性。第三，在长期催化试验中，NiO-10Al₂O₃-ZrO₂催化剂对镍的损失表现出高度抑制作用。最后，Al的添加可以抑制ZrO₂在还原和反应过程中的还原，进一步赋予其稳定性。
