Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials
Aguilar Tapia, Antonio
KAUST DepartmentChemical Science Program
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Online Publication Date2017-02-21
Print Publication Date2017-07
Permanent link to this recordhttp://hdl.handle.net/10754/622945
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AbstractConducting 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.
CitationZhou L, Enakonda LR, Harb M, Saih Y, Aguilar-Tapia A, et al. (2017) Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials. Applied Catalysis B: Environmental 208: 44–59. Available: http://dx.doi.org/10.1016/j.apcatb.2017.02.052.
SponsorsThe work has been supported by Air Liquide company.