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Hydrogen production via glycerol dry reforming over La-Ni/Al 2 O3 catalyst

Siew, Kah Weng and Lee, Hua Chyn and Jolius, Gimbun and Cheng, C. K. (2013) Hydrogen production via glycerol dry reforming over La-Ni/Al 2 O3 catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 8 (2). pp. 160-166. ISSN 1978-2993

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Glycerol (a bio-waste generated from biodiesel production) has been touted as a promising bio-syngas precursor via reforming route. Previous studies have indicated that carbon deposition is the major performance-limiting factor for nickel (Ni) catalyst during glycerol steam reforming. In the current paper, dry (CO2)-reforming of glycerol, a new reforming route was carried out over alumina (Al2O3)-supported non-promoted and lanthanum-promoted Ni catalysts. Both sets of catalysts were synthesized via wet co-impregnation procedure. The physicochemical characterization of the catalyst showed that the promoted catalyst possessed smaller metal crystallite size, hence higher metal dispersion compared to the virgin Ni/Al2O3 catalyst. This was also corroborated by the surface images captured by the FESEM analysis. In addition, BET surface area measurement gave 92.05m²/g for non-promoted Ni catalyst whilst promoted catalysts showed an average of 1 to 6% improvement depending on the La loading. Reaction studies at 873 K showed that glycerol dry reforming successfully produced H2 with glycerol conversion and H2 yield that peaked at 9.7% and 25% respectively over 2wt% La content. The optimum catalytic performance by 2%La-Ni/Al2O3 can be attributed to the larger BET surface area and smaller crystallite size that ensured accessibility of active catalytic sites.

Item Type: Article
Uncontrolled Keywords: Biofuel; Dry reforming; Gycerol; Hydrogen
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 10 Dec 2019 01:12
Last Modified: 10 Dec 2019 01:12
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