Effective hydrogen production from partial oxidation of propane over composite Ni/Al2O3SiC catalyst. (8th January 2019)

• Record Type: Journal Article
• Authors: Wang, Chao; Liao, Mingzheng; Bu, Enqi; Jiang, Zhiqiang; Chen, Ying; Cheng, Zhengdong; Luo, Xianglong; Liang, Bo; Shu, Riyang; Song, Qingbin
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 2(2019)
• Page Start: 680
• Page End: 693
• Publication Date: 2019-01-08
• Subjects: Hydrogen production -- Partial oxidation of propane -- Silicon carbide -- Ni based catalyst; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.11.013
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, hydrogen production from partial oxidation (POX) of propane over composite Ni/Al2 O3 SiC catalyst was investigated. In order to utilize the high thermal conductivity and chemical stability of SiC, the composite Al2 O3 SiC support of the catalyst was synthesized by precipitation technique, then Ni component was loaded using impregnation method. The as-prepared samples were characterized by X-ray diffraction, BET, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) measurements. As observed, stacking porous structures were appeared after calcination process by doping SiC with certain ratios. According to the stiochiometric ratio, a C3 H8 O2 (1:1.5) gas mixture was used to study the catalytic activity for hydrogen production from POX of propane. From the results, local overheat of the catalyst bed generated by the exothermic reactions was relieved by doping SiC and Ni/Al2 O3 SiC (30 wt%) catalyst performed a higher hydrogen production. Aggregation and carbon deposition of Ni/Al2 O3 SiC (30 wt%) catalyst were reduced compared to Ni/Al2 O3 from the observation of SEM and TEM with H2 production up to around 236 μmol/gcat ·s and kept stable for 26 h at 600 °C. By means of TGA, non-isothermal oxidative decarburizations of the spent catalysts were studied. It was found that less carbon deposit and lower activation energy for oxidative decarburization were found by doping SiC to Ni/Al2 O3 . Graphical abstract: Image 1 Highlights: Enhanced H2 production from POX of propane is achieved over Ni/Al2 O3 SiC. Local overheat of catalyst bed is reduced by doping SiC. Non-isothermal kinetics for oxidative decarburization of the spent catalysts are implemented.