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Characterization of La-promoted Ni/Al2 O3 catalysts for hydrogen production from glycerol dry reforming

Siew, Kah Weng and Lee, Hua Chyn and Jolius, Gimbun and Cheng, C. K. (2014) Characterization of La-promoted Ni/Al2 O3 catalysts for hydrogen production from glycerol dry reforming. Journal of Energy Chemistry, 23 (1). pp. 15-21. ISSN 2095-4956

Characterization of La-promoted NiAl2O31.pdf

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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
Uncontrolled Keywords: Ni catalysts; dry reforming; lanthanide promotion; reaction kinetics
Subjects: T Technology > TP Chemical technology
Faculty/Division: Centre of Excellence: Centre of Excellence for Advanced Research in Fluid Flow
Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 19 Feb 2020 06:52
Last Modified: 19 Feb 2020 06:52
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