Characterization of La-promoted Ni/Al2O3 Catalysts for Hydrogen Production from Glycerol Dry Reforming

Kah, Weng Siew and Hua, Chyn Lee and Jolius, Gimbun and Cheng, C. K. (2014) Characterization of La-promoted Ni/Al2O3 Catalysts for Hydrogen Production from Glycerol Dry Reforming. Journal of Energy Chemistry, 23 (1). pp. 15-21. ISSN 2095-4956. (Published)

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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 nickel (Ni) catalysts. Both sets of catalysts were synthesized via a wet co-impregnation procedure. Physicochemical characterization of the catalysts 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. From temperature-programmed calcination analysis, the derivative weight profiles revealed two peaks, which represent a water elimination peak at a temperature range of 373 to 473 K followed by nickel nitrate decomposition from 473 to 573 K. In addition, BET surface area measurements gave 85.0 m2·g−1 for the non-promoted Ni catalyst, whilst the promoted catalysts showed an average of 1% to 6% improvement depending on the La loadings. Significantly, reaction studies at 873 K showed that glycerol dry reforming successfully produced H2. The 2%La-Ni/Al2O3 catalyst, which possessed the largest BET surface area, gave an optimum H2 generation (9.70%) at a glycerol conversion of 24.5%.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Ni catalysts; Dry reforming; Lanthanide promotion; Reaction kinetics
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 26 Aug 2014 03:56
Last Modified: 21 Feb 2018 02:45
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