Methane decomposition over Fe-based catalysts

Karaismailoğlu Elibol M., Figen H. E., Baykara Z. S.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol.45, no.60, pp.34773-34782, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 45 Issue: 60
  • Publication Date: 2020
  • Doi Number: 10.1016/j.ijhydene.2020.07.219
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.34773-34782
  • Keywords: Catalytic methane decomposition, Hydrogen, Fe-based catalyst, HYDROGEN-PRODUCTION, CARBON NANOTUBES, IRON CATALYSTS, REDUCTION
  • Yıldız Technical University Affiliated: Yes


Catalytic approach for methane decomposition can be seriously considered as a promising process for COx free hydrogen generation. In this study, catalytic methane decomposition was performed using Fe-based catalysts, and catalytic performance tests were carried out in a CH4:N-2 flow at 750 and 800 degrees C. The analyses of reaction products were carried out by a mass spectrometer. For the preparation of Fe-based catalysts, sol-gel method was utilized. Yttria (Y2O3) and alumina (Al2O3) were used as support materials. Theoretical molar ratios (Fe2O3/Y2O3/Al2O3) of the samples C1-C5 were 1:0:0, 1:1:0, 1:1:5, 2:1:4 and 3:1:6, respectively. The characterization analyses of fresh and spent catalysts were performed with XRD, SEM, TPR, TG-FTIR and BET surface analysis techniques. Surface basicity of catalysts was determined via CO2-TPD measurements. In the presence of Fe2O3/Y2O3 and Fe2O3/Y2O3/Al2O3 catalysts, methane conversions of 29% and 4% were achieved at 750 degrees C. Adding alumina into Fe2O3/Y2O3 catalyst leads to the formation of garnet type crystal structure which reduces catalytic activity. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.