TY - JOUR
T1 - Ni supported on CaO-MgO-Al2O3 as a highly selective and stable catalyst for H2 production via the glycerol steam reforming reaction
AU - Charisiou, N. D.
AU - Papageridis, K. N.
AU - Tzounis, L.
AU - Sebastian, V.
AU - Hinder, S. J.
AU - Baker, M. A.
AU - AlKetbi, M.
AU - Polychronopoulou, K.
AU - Goula, M. A.
N1 - Funding Information:
Financial support by the program THALIS implemented within the framework of Education and Lifelong Learning Operational Programme, co-financed by the Hellenic Ministry of Education, Lifelong Learning and Religious Affairs and the European Social Fund, Project Title: ‘Production of Energy Carriers from Biomass by Products. Glycerol Reforming for the Production of Hydrogen, Hydrocarbons and Superior Alcohols’ is gratefully acknowledged by LAFEC's members. VS acknowledges financial support from CIBER-BBN (financed by the Instituto de Salud Carlos III with assistance from the European Regional Development Fund). KP acknowledges the financial support from the Abu Dhabi Educational Council (ADEC) through the Award for Research Excellence (B3111). The authors are grateful to K. Kousi for the TPO measurements.
Funding Information:
Financial support by the program THALIS implemented within the framework of Education and Lifelong Learning Operational Programme, co-financed by the Hellenic Ministry of Education, Lifelong Learning and Religious Affairs and the European Social Fund, Project Title: ‘Production of Energy Carriers from Biomass by Products. Glycerol Reforming for the Production of Hydrogen, Hydrocarbons and Superior Alcohols’ is gratefully acknowledged by LAFEC's members. VS acknowledges financial support from CIBER-BBN (financed by the Instituto de Salud Carlos III with assistance from the European Regional Development Fund). KP acknowledges the financial support from the Abu Dhabi Educational Council (ADEC) through the Award for Research Excellence (B3111). The authors are grateful to K. Kousi for the TPO measurements.
Publisher Copyright:
© 2018 Hydrogen Energy Publications LLC
PY - 2019/1/1
Y1 - 2019/1/1
N2 - A comparative study of the GSR performance for Ni/CaO-MgO-Al2O3 and Ni/Al2O3 catalysts is reported. Catalysts were synthesized applying the wet impregnation method at a constant metal loading (8 wt %). Synthesized samples were characterized by N2 adsorption/desorption, ICP, BET, XRD, NH3-TPD, CO2-TPD, H2-TPR, XPS, TEM, STEM-HAADF and EDS. The carbon deposited on their surface under reaction conditions was characterized by TPO, Raman and TEM. It was proven that the use of CaO-MgO as alumina modifiers leads to smaller nickel species crystallite size, increased basicity and surface amount of Ni0 phase. Thus, it increases the conversion to gaseous products favoring H2 and CO2 production to the detriment of CO formation, by enhancing the water gas-shift (WGS) reaction. No liquid products were produced by the Ni/modAl catalyst over 550 °C, whereas time on stream results confirmed that deactivation can be prevented, as apart from decreasing the amount of coke deposition the nature of carbon was altered towards less graphitic and more defective structures.
AB - A comparative study of the GSR performance for Ni/CaO-MgO-Al2O3 and Ni/Al2O3 catalysts is reported. Catalysts were synthesized applying the wet impregnation method at a constant metal loading (8 wt %). Synthesized samples were characterized by N2 adsorption/desorption, ICP, BET, XRD, NH3-TPD, CO2-TPD, H2-TPR, XPS, TEM, STEM-HAADF and EDS. The carbon deposited on their surface under reaction conditions was characterized by TPO, Raman and TEM. It was proven that the use of CaO-MgO as alumina modifiers leads to smaller nickel species crystallite size, increased basicity and surface amount of Ni0 phase. Thus, it increases the conversion to gaseous products favoring H2 and CO2 production to the detriment of CO formation, by enhancing the water gas-shift (WGS) reaction. No liquid products were produced by the Ni/modAl catalyst over 550 °C, whereas time on stream results confirmed that deactivation can be prevented, as apart from decreasing the amount of coke deposition the nature of carbon was altered towards less graphitic and more defective structures.
KW - AlO modifiers
KW - CaO-MgO doping
KW - Glycerol steam reforming
KW - H production
KW - Ni catalysts
UR - http://www.scopus.com/inward/record.url?scp=85044072769&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2018.02.165
DO - 10.1016/j.ijhydene.2018.02.165
M3 - Article
AN - SCOPUS:85044072769
SN - 0360-3199
SP - 256
EP - 273
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
ER -
