Methanation of syngas (H2/CO) over the different Ni-based catalysts

Chongbo Cheng, Dekui Shen*, Rui Xiao, Chunfei Wu

*Corresponding author for this work

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Methanation of syngas (H2/CO) in a fixed-bed down-flow reactor under atmospheric atmosphere was investigated over a series of Ni-based catalysts with Fe and TiO2 as the support. The prepared catalysts (Ni/Al2O3, Ni-Fe/Al2O3, and Ni-Fe/TiO2-Al2O3) were characterized by N2 adsorption-desorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). The characteristics of the catalysts for the methanation process were investigated with the ratio of H2/CO as 3:1 under an atmospheric pressure. The addition of Fe in the Ni/Al2O3 catalyst could promote the dispersion of Ni species and decrease the reduction temperature of catalyst. The optimal ratio for Ni-Fe/Al2O3 catalyst was estimated to be 1 due to the small-sized Ni particles and easily reducible β-type NiO species, giving the CO conversion of 97% and CH4 selectivity of 94% at 262 °C. The addition of TiO2 (10 wt%) in Ni-Fe/Al2O3 catalyst promotes the formation of Ni-Fe alloy, facilitating the methanation reaction at low temperatures and suppressing the coke deposition. This also results in the outstanding stability of the Ni-Fe/TiO2-Al2O3 catalyst over other Ni-Fe/Al2O3 catalysts.

Original languageEnglish
Pages (from-to)419-427
Number of pages9
JournalFuel
Volume189
Early online date15 Nov 2016
DOIs
Publication statusPublished - 01 Feb 2017

Keywords

  • Methanation
  • Ni-based catalyst
  • Stability

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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