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Oxidative coupling of methane on BaTiO3 perovskites partially substituted with germanium

Boghaee, D. M ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. Publisher: AIChE , 2008
  3. Abstract:
  4. The perovskite oxide BaTiO3, doped with Ge oxides oxidized methane to C2 coupled hydrocarbons. The ultraviolet-visible spectra of pure barium titanate and Ge doped BaTi(1-x)GexO3(x=0.05,0.1) were compared. The pure barium titanate exhibited an ultraviolet absorption effect. The addition of GeO2 resulted in an increase in absorption of wavelength. Therefore, small amount of Ge decreased band gap energy. Oxygen is inserted by nucleophilic attack which may be considered as an acid-base process. For promoted BaTiO3catalysts with stable cation valance, electron donation ability of lattice oxygen is parallels to its ability of adsorb and active oxygen, and decrease the chance of deep oxidation of methyl radicals and C2hydrocarbons and thus will result in an increase of C2yield
  5. Keywords:
  6. Barium ; Barium titanate ; Energy gap ; Germanium oxides ; Ionization of gases ; Methane ; Oxygen ; Perovskite ; Band gap energy ; Electron donation ; Nucleophilic attack ; Oxidative coupling of methane ; Oxidative couplings ; Perovskite oxides ; Ultraviolet absorption ; Ultraviolet-visible spectra ; Germanium
  7. Source: Catalysis and Reaction Engineering Division Conference, Presentations at the 2008 AIChE Spring National Meeting, 6 April 2008 through 10 April 2008 ; 2008 , Pages 89-94 ; 9781605602233 (ISBN)
  8. URL: https://www.aiche.org/conferences/aiche-spring-meeting-and-global-congress-on-process-safety/2008/proceeding/paper/144b-oxidative-coupling-methane-on-batio3-perovskites-partially-substituted-germanium