Catalytic Performance and Characterization of Highly Efficient Composite Ni(Clx)/CeO2/η-Al2O3/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

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Abstract

Structured composite Ni(Clx)/CeO2/η-Al2O3/FeCrAl catalysts are developed for the reaction of preferential methanation of carbon monoxide in the presence of carbon dioxide. The use of a FeCrAl alloy wire mesh as a support for Ni(Cl)/CeO2 allows preparation of a heat-conducting catalyst that is similar in performance and physical-chemical properties to the highly efficient catalysts in the form of micro pellets, as confirmed by catalytic tests and XRD, XPS, TEM, SEM, EDX characterization techniques. Catalytic tests are carried out in hydrogen-rich mixture which contains (vol. %): 1 CO, 65 H2, 10 H2O, 20 CO2, He – balance; weight hourly space velocity is 29,000 cm3gcat −1h−1. The structured catalyst with highly dispersed nickel and optimal chlorine content provides CO removal to a level of <10 ppm in the temperature interval of 230–300 °C. XRD, TEM, SEM and EDX analysis confirm the presence of Ni nanoparticles and CeOCl species in the catalytic coating. XPS study of samples after reductive pretreatment (simulating CO preferential methanation reaction conditions) in the preparation chamber of the spectrometer reveals the metallic state of Ni and high concentrations of Cl and Ce3+ on the catalyst surface.

Original languageEnglish
Pages (from-to)1228-1234
Number of pages7
JournalChemistrySelect
Volume5
Issue number3
DOIs
Publication statusPublished - 23 Jan 2020

Keywords

  • CO cleanup
  • FeCrAl alloy wire mesh
  • hydrogen-rich gas
  • nickel-cerium oxide catalysts
  • structured catalysts
  • OXIDATION
  • FOAMS
  • STREAM
  • STEAM
  • CHLORINE
  • SUPPORTED NICKEL-CATALYSTS
  • REMOVAL
  • CLEANUP
  • GAS
  • METAL

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