Hydrogen Production via Glycerol Steam Reforming over Ni/Al2O3: Influence of Nickel Precursors

被引:171
作者
Wu, Gaowei
Zhang, Chengxi
Li, Shuirong
Han, Zhiping
Wang, Tuo
Ma, Xinbin
Gong, Jinlong [1 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, Minist Educ, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China
来源
ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2013年 / 1卷 / 08期
关键词
Nickel precursor; Ni/Al2O3; Glycerol steam reforming Hydrogen production; Coke deposition; NI CRYSTAL SIZE; H-2; PRODUCTION; CATALYSTS; ETHANOL; METHANE; SUPPORT; ALUMINA; BIOMASS; WATER; PERFORMANCE;
D O I
10.1021/sc400123f
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
This paper describes an investigation regarding the influence of Ni precursors on catalytic performances of Nil Al2O3 catalysts in glycerol steam reforming. A series of Nil Al2O3 is synthesized using four different precursors, nickel nitrate, nickel chloride, nickel acetate, and nickel acetylacetonate. Characterization results based on N-2 adsorption-desorption, X-ray diffraction, H-2 temperature-programmed reduction, H-2 chemisorption, transmission electron microscopy, and thermogravimetric analysis show that reduction degrees of nickel, nickel dispersion, and particle sizes of Nil Al2O3 catalysts are closely dependent on the anion size and nature of the nickel precursors. Ni/Al2O3 prepared by nickel acetate possesses the moderate Ni reduction degree, high Ni dispersion, and small nickel particle size, which possesses the highest H-2 yield. Reaction parameters are also examined, and 550 degrees C and a steam-to-carbon ratio of 3 are optimized. Moreover, coke deposition, mainly graphite species, leads to the deactivation of Ni/Al2O3 catalysts in glycerol steam reforming. Nickel chloride-derived Ni/Al2O3 catalysts suffer from severe coke deposition and low reaction activity due to large Ni particle size, low Ni dispersion, and residual chloride.
引用
收藏
页码:1052 / 1062
页数:11
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