Boosting hydrogen production from steam reforming of glycerol via constructing moderate metal-support interaction in Ni@Al2O3 catalyst

被引:22
作者
Wang, Yunzhu [1 ,4 ,5 ]
Zhu, Songshan [1 ,4 ,5 ]
Lu, Jichang [1 ,4 ,5 ]
Liu, Jiangping [1 ,4 ,5 ]
Zhao, Yi [1 ,4 ,5 ]
He, Sufang [2 ]
Zhao, Yuhui [1 ,4 ,5 ]
Lu, Huihui [1 ,4 ,5 ]
Luo, Yongming [1 ,3 ,4 ,5 ]
机构
[1] Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming 650500, Peoples R China
[2] Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Peoples R China
[3] Kunming Univ Sci & Technol, Fac Chem Engn, Kunming 650500, Peoples R China
[4] Innovat Team Volatile Organ Cpds Pollutants Contro, Kunming 650500, Peoples R China
[5] Higher Educ Key Lab Odorous Volatile Organ Cpds Po, Kunming 650500, Peoples R China
基金
中国国家自然科学基金;
关键词
Hydrogen production; Glycerol steam reforming; Metal-support interaction; Core-shell structure; Filamentous coke; NI-BASED CATALYSTS; NICKEL-CATALYSTS; BIO-OIL; STABILITY; PERFORMANCE; METHANE; COKE; CE; DEACTIVATION; STRATEGIES;
D O I
10.1016/j.fuel.2022.124583
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In this manuscript, the relationship between metal-support interaction and the catalytic performance for hydrogen production from steam reforming of glycerol (GSR) over Ni-Al2O3 based catalysts was studied. Pure core-shell structured Ni@Al2O3 and supported Ni/Al2O3 with a fixed medium-sized nickel particle were synthesized without the other additional components to eliminate the influence of other factors. And then the nickelalumina interaction of Ni@Al2O3 was tuned precisely and the regulatory mechanism of nickel-alumina interaction on catalytic activity was elaborated. The strong nickel-alumina interaction over Ni/Al2O3 and Ni@Al2O3 with high calcination temperature resulted in the formation of NiAl2O4, which was unfavorable to the reduction of nickel species to obtain the more active nickel. Consequently, the poor catalytic performance was caused. The moderate nickel-alumina interaction of Ni@Al2O3 promoted the exposure of the maximum area of active nickel and obtained higher turnover frequency (TOF). Thus, Ni@Al2O3 showed the high catalytic performance in GSR. Additionally, metal-support interaction affected the morphology and growth mechanism of coke deposition. For Ni@Al2O3 with moderate nickel-alumina interaction, the formation of carbon deposition followed the `tipgrowth' pattern, and the filamentous coke was mainly formed on catalysts. Conversely, `base-growth' pattern was followed on Ni/Al2O3 with strong nickel-alumina interaction to form mainly encapsulated coke. The research findings of the regulatory role of interaction between nickel and alumina on catalytic performance will provide valuable guidelines for designing effective GSR catalysts.
引用
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页数:14
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