Oxidative Coupling of Methane Over CaF2/Sm2O3Catalysts

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (2): 290.

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Oxidative Coupling of Methane Over CaF₂/Sm₂O₃Catalysts

ZHOU Shui-Qin, LONG Rui-Qiang, HUANG Ya-Ping, WAN Hui-Lin, TSAI Khi-Rui

Department of Chemistry, State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen Univeristy, Xiamen, 361005

Received:1994-03-10 Revised:1994-07-10 Online:1995-02-24 Published:1995-02-24

Abstract

Abstract: The results showed that,with the addition of CaF₂to Sm₂O₃,the catalytic properties for OCM were apparently improved.XRD analysis of the fresh catalysts revealed the existence of SmOF in 20%-80% CaF₂/Sm₂O₃XPS and IR spectra of O_2-pre adsorbed CaF₂/Sm₂O₃samples taken at room temperature indicated the presence of O₂^-and O₂^-species. O₂^-species could also be detected over 20%CaF₂/Sm₂O₃at 500℃ in situ IRspectroscopy,but it vanished over the Sm₂O₃at the same temperature.

Key words: Methane oxidative coupling, CaF₂, Sm₂O₃, Ionic exchange, Oxygen species

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ZHOU Shui-Qin, LONG Rui-Qiang, HUANG Ya-Ping, WAN Hui-Lin, TSAI Khi-Rui. Oxidative Coupling of Methane Over CaF₂/Sm₂O₃Catalysts[J]. Chem. J. Chinese Universities, 1995, 16(2): 290.

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Oxidative Coupling of Methane Over CaF₂/Sm₂O₃Catalysts

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