The Function of Lithium as a Promoter in Oxidative Coupling of Methane

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (2): 268.

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The Function of Lithium as a Promoter in Oxidative Coupling of Methane

YANG Xiang-Guang¹, BI Ying-Li¹, ZHEN Kai-Ji¹, WANG Ji-Xiang², LIU Ya-Yan², ZHAN Ri-Yun², WU Yue²

1. Department of Chemistry, Mat University, Changchun, 130023;
2. Changchan Insitnte of Applied Chemistry, Ghinese Academy of Sicences Changchun

Received:1992-03-11 Revised:1992-02-29 Online:1993-02-24 Published:1993-02-24

Abstract

Abstract: in this paper, the function of lithium as a promoter in oxidative coupling of methane is reported.Based on the determination of different lithium salts, the authors found that the addition of lithium sulphate showed a higher selectivity for C₂ formation, that of LiNO₃ gave better C₂ yield, the difference of catalytical properties over the two catalysts is related to the different forms of lithium.In Li/CaOcatalyst the active center is [LiO] and in Li/La₂O₃ catalyst the active site is the surface non-stoichiometric oxide of La.O,.Additionlly, the difference of the relations between the structrue and catalytic properties of Li/La₂C>₃ and Li-La/CaOcatalysts was studied as well.Based on the results of luminescence emission spectra determination, we also clarfied the interaction between Li and CaO, La₂O₃ correlated to the account of lithium.

Key words: Methane, Oxidative coupling, Lithium

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YANG Xiang-Guang, BI Ying-Li, ZHEN Kai-Ji, WANG Ji-Xiang, LIU Ya-Yan, ZHAN Ri-Yun, WU Yue. The Function of Lithium as a Promoter in Oxidative Coupling of Methane[J]. Chem. J. Chinese Universities, 1993, 14(2): 268.

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The Function of Lithium as a Promoter in Oxidative Coupling of Methane

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