Abstract
We studied the oxidative coupling of methane over the LaF3/La2O3 (50∶50) catalyst. The catalyst was found active even at 873 K. At 1023 K, the C2 yield was 12.7% at 26.0% CH4 conversion and 49.1% C2 selectivity. It was found to be stable and had a lifetime not less than 50 h at 1023 K. The catalyst was effective in C2H6 conversion to C2H4. XRD results indicated that the catalyst was mainly rhombohedral LaOF. It is suggested that the catalyst has ample stoichiometric defects and generates active oxygen sites suitable for methane dehydrogenation.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Z.L. Zhang, C.T. Au and K.R. Tsai, Appl. Catal. 62 (1990) L29.
T. Fang and C. Yeh, J. Catal. 69 (1981) 227.
K. Otsuka, K. Jinno and A. Morikawa, J. Catal. 100 (1986) 353.
R. Burch, G.D. Squire and S.C. Tsang, Appl. Catal. 43 (1988) 105.
F.Y. Qiu, S.K. Shen and S.B. Li, J. Mol. Catal. (China) 4 (1990) 112.
J.M. Deboy and R.F. Hicks, J. Catal. 113 (1988) 517.
J.M. Deboy and R.F. Hicks, J. Chem. Soc. Chem. Commun. (1988) 982.
J.X. Wang, Y.B. Liu, L.C. Wang and Y. Wu, J. Appl. Chem. (China) 8 (1991) 60.
K. Otsuka, Q. Liu and A. Morikawa, J. Chem. Soc. Chem. Commun. (1986) 586.
A.M. Gaffney, C.A. Jones, J.J. Leonard and J.A. Sofranko, J. Catal. 114 (1988) 422.
T. Le Van, M. Che and J.M. Tatibouët, Catal. Lett. 14 (1992) 321.
H. Yamashita, Y. Machida and A. Tomoita, Appl. Catal. 79 (1991) 203.
S. Becker and M. Baerns, J. Catal. 128 (1991) 512.
Z.L. Zhang and M. Baerns, J. Catal. 135 (1992) 317.
J.A. Sofranko, J.J. Leonard and C.A. Jones, J. Catal. 103 (1987) 302.
M.Y. Lo, S.K. Agarwal and G. Marcelin, J. Catal. 112 (1988) 168.
C.H. Lin, K.D. Campbell, J. Wang and J.H. Lunsford, J. Phys. Chem. 90 (1986) 534.
H.S. Zhang, J.X. Wang, D.J. Driscoll and J.H. Lunsford, J. Catal. 112 (1988) 366.
Y. Amenonyiya, V.I. Birss, M. Goledzinowski, J. Gluszka and A.R. Sanger, Catal. Rev.-Sci. Eng. 32 (1990) 163.
A.F. Wells,Structural Inorganic Chemistry, 5th Ed. (Oxford Univ. Press, Oxford, 1984) p. 482.
C.H. Lin, J.X. Wang and J.H. Lunsford, J. Catal. 111 (1988) 302.
E. Iwamatsu, T. Moriyama, N. Takasaki and K. Aika, J. Catal. 113 (1988) 25.
T. Ito, J.X. Wang, C.H. Lin and J.H. Lunsford, J. Am. Chem. Soc. 107 (1985) 5062.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Au, C.T., Zhang, Y.Q., Ng, C.F. et al. Oxidative coupling of methane over LaF3/La2O3 catalysts. Catal Lett 23, 377–386 (1994). https://doi.org/10.1007/BF00811372
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00811372