TY - JOUR
T1 - Characterization of La-promoted Ni/Al2O3 catalysts for hydrogen production from glycerol dry reforming
AU - Siew, Kah Weng
AU - Lee, Hua Chyn
AU - Gimbun, Jolius
AU - Cheng, Chin Kui
PY - 2014/1
Y1 - 2014/1
N2 - In the current paper, dry (CO2)-reforming of glycerol, a new reforming route, was carried out over alumina (Al2O 3)-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 H 2 generation (9.70%) at a glycerol conversion of 24.5%.
AB - In the current paper, dry (CO2)-reforming of glycerol, a new reforming route, was carried out over alumina (Al2O 3)-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 H 2 generation (9.70%) at a glycerol conversion of 24.5%.
KW - Ni catalysts dry reforming lanthanide promotion reaction kinetics
UR - http://www.scopus.com/inward/record.url?scp=84893286731&partnerID=8YFLogxK
U2 - 10.1016/S2095-4956(14)60112-1
DO - 10.1016/S2095-4956(14)60112-1
M3 - Article
AN - SCOPUS:84893286731
SN - 2095-4956
VL - 23
SP - 15
EP - 21
JO - Journal of Energy Chemistry
JF - Journal of Energy Chemistry
IS - 1
ER -