TY - JOUR
T1 - Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials
AU - Zhou, Lu
AU - Enakonda, Linga
AU - Harb, Moussab
AU - Saih, Youssef
AU - Aguilar Tapia, Antonio
AU - Ould-Chikh, Samy
AU - Hazemann, Jean-louis
AU - Li, Jun
AU - Wei, Nini
AU - Gary, Daniel
AU - Del-Gallo, Pascal
AU - Basset, Jean-Marie
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The work has been supported by Air Liquide company.
PY - 2017/2/21
Y1 - 2017/2/21
N2 - Conducting catalytic methane decomposition over Fe catalysts is a green and economic route to produce H2 without CO/CO2 contamination. Fused 65wt% and impregnated 20wt% Fe catalysts were synthesized with different additives to investigate their activity, whereas showing Fe-Al2O3 combination as the best catalyst. Al2O3 is speculated to expose more Fe00 for the selective deposition of carbon nano tubes (CNTs). A fused Fe (65wt%)-Al2O3 sample was further investigated by means of H2-TPR, in-situ XRD, HRTEM and XAS to conclude 750°C is the optimized temperature for H2 pre-reduction and reaction to obtain a high activity. Based on density functional theory (DFT) study, a reaction mechanism over Fe catalysts was proposed to explain the formation of graphite from unstable supersaturated iron carbides decomposition. A carbon deposition model was further proposed which explains the formation of different carbon nano materials.
AB - Conducting catalytic methane decomposition over Fe catalysts is a green and economic route to produce H2 without CO/CO2 contamination. Fused 65wt% and impregnated 20wt% Fe catalysts were synthesized with different additives to investigate their activity, whereas showing Fe-Al2O3 combination as the best catalyst. Al2O3 is speculated to expose more Fe00 for the selective deposition of carbon nano tubes (CNTs). A fused Fe (65wt%)-Al2O3 sample was further investigated by means of H2-TPR, in-situ XRD, HRTEM and XAS to conclude 750°C is the optimized temperature for H2 pre-reduction and reaction to obtain a high activity. Based on density functional theory (DFT) study, a reaction mechanism over Fe catalysts was proposed to explain the formation of graphite from unstable supersaturated iron carbides decomposition. A carbon deposition model was further proposed which explains the formation of different carbon nano materials.
UR - http://hdl.handle.net/10754/622945
UR - http://www.sciencedirect.com/science/article/pii/S092633731730156X
UR - http://www.scopus.com/inward/record.url?scp=85013658832&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2017.02.052
DO - 10.1016/j.apcatb.2017.02.052
M3 - Article
SN - 0926-3373
VL - 208
SP - 44
EP - 59
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -