Liu Yibo, He Xiaoqiang, Mo Wenlong, Qin Song, Guo Jinchun, Deng Yuanjian, Abudurehman Bujannat
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering, Xinjiang University, Urumqi, 830046 Xinjiang, China.
ACS Omega. 2021 Oct 11;6(42):27668-27675. doi: 10.1021/acsomega.1c02410. eCollection 2021 Oct 26.
Ni/AlO catalysts were prepared with Ni(NO)·6HO, NiSO·6HO, NiCl·6HO, and NiCHO·4HO as nickel sources by the solution combustion method. The catalysts were characterized by X-ray diffraction, H temperature-programmed hydrogenation, TG-DTG, TPH, and transmission electron microscopy methods, and the effect of the nickel source on performance of the Ni/AlO catalyst was investigated via the CO-CH reforming experiment. Results showed that Ni dispersion, Ni size, and the metal-support interaction between active component Ni and the support were influenced significantly by anion in nickel sources, resulting in that the performance of each catalyst was different. Highly dispersed Ni species, small Ni crystallite size, and strong metal-support interaction were presented in the Ni/AlO catalysts with Ni(NO)·6HO and NiSO·6HO as nickel sources. Evaluation results showed that the catalyst prepared with Ni(NO)·6HO exhibited higher activity and stability, with CH and CO conversions of 31.21 and 48.97%. Carbon deposition analysis demonstrated that the catalyst prepared with NiSO·6HO contained more graphite carbon.
采用溶液燃烧法，以硝酸镍·6水合物、硫酸镍·6水合物、氯化镍·6水合物和甲酸镍·4水合物为镍源制备了镍/氧化铝催化剂。通过X射线衍射、氢气程序升温氢化、热重-微商热重、程序升温脱附以及透射电子显微镜等方法对催化剂进行了表征，并通过CO-CH重整实验研究了镍源对镍/氧化铝催化剂性能的影响。结果表明，镍源中的阴离子对镍的分散度、镍粒径以及活性组分镍与载体之间的金属-载体相互作用有显著影响，导致各催化剂的性能有所不同。以硝酸镍·6水合物和硫酸镍·6水合物为镍源的镍/氧化铝催化剂呈现出高度分散的镍物种、较小的镍微晶尺寸以及较强的金属-载体相互作用。评价结果表明，以硝酸镍·6水合物制备的催化剂表现出更高的活性和稳定性，甲烷和一氧化碳转化率分别为31.21%和48.97%。积碳分析表明，以硫酸镍·6水合物制备的催化剂含有更多的石墨碳。
