Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (08): 1040-1042.doi: 10.3866/PKU.WHXB20060826

• Note • Previous Articles    

Li-ZnO/La2O3 Catalyst for the Oxidation Coupling of Methane at Low Temperature

HOU Si-Cong;LIU Ling-Tao;KOU Yuan   

  1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences, Green Chemistry Center of Peking University, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2006-06-01 Revised:2006-06-22 Published:2006-08-04
  • Contact: KOU Yuan E-mail:yuankou@pku.edu.cn

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Abstract: The oxidative coupling of methane (OCM) at low temperature was examined on Li- ZnO/La2O3 catalyst with w(Li)=2% and w(ZnO)=20%. CH4 conversion of 27.3% with C2 selectivity of 65.2% was obtained at 680 ℃ and the C2 yield reached 21.8% at 700 ℃ under reaction conditions. Raman and XPS results suggested that the low- temperature activity was related to the concentration of adsorbed oxygen species on the catalyst surface and La2O2CO3 was supposed to be responsible for the enhancement of C2 selectivity in OCM.

Key words: Oxidative coupling of methane, Low temperature, Li- ZnO/La2O3, Adsorbed oxygen species, La2O2CO3