A single-pass process with the combination of oxidative coupling (OCM) and dehydro-aromatization (MDA) for the direct conversion of methane is carried out. With the assistance of the OCM reaction over the SrO–La2O3/CaO catalyst loaded on top of the catalyst bed, the duration of the dehydro-aromatization reaction catalyzed by a 6Mo/HMCM-49 catalyst shows a significant improvement, and. the initial deactivation rate constant of the overall process revealed about 1.5×10−6 s−1. Up to 72 h on stream, the yield of aromatics was still maintained at 5.0% with a methane conversion of 9.6%, which is obviously higher than that reported for the conventional MDA process with single catalyst. Upon the TPR results, this wonderful enhancement would be attributed to an in-situ formation of CO2 and H2O through the OCM reaction, which serves as a scavenger for actively removing the coke formed during the MDA reaction via a reverse Boudouard reaction and the water gas reaction as well.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
L. Wang L. Tao M. Xie G. Xu J. Huang Y. Xu (1993) Catal. Lett. 21 5
Y. Xu L. Lin (1999) Appl. Catal. A 188 53
Y. Shu M. Ichikawa (2001) Catal. Today 71 55
Y. Xu X. Bao L. Lin (2003) J. Catal. 216 386
S. Liu Q. Dong R. Ohnishi M. Ichikawa (1997) Chem. Commun. 15 1455
Y. Lu, D. Ma, Z. Xu, Z. Tian, X. Bao and L. Lin, Chem. Commun. 20 (2001) 2048
D. Ma Y. Lu L. Su Z. Xu Z. Tan Y. Xu L. Lin X. Bao (2002) J. Phys.Chem. B. 106 8524
Y. Shu R. Ohnishi M. Ichikawa (2002) Catal. Lett. 81 9
W. Ding G.D. Meitzner E. Iglesia (2002) J. Catal. 206 14
H. Wang G. Hu H. Lei Y. Xu X. Bao (2003) Catal. Lett. 89 75
H. Wang L. Su J. Zhuang D. Tan Y. Xu X. Bao (2003) J. Phys. Chem B. 107 12964
Y. Shu D. Ma L. Xu Y. Xu X. Bao (2000) Catal. Lett. 70 67
D. Wang Q. Kan N. Xu P. Wu T. Wu (2000) Catal. Today 93–95 75
S. Liu, L. Wang, Q. Dong, R. Onishi and M. Ichikawa, Chem. Commun. (1998) 1217
Y. Shu R. Ohnishi M. Ichikawa (2002) J. Catal. 206 134
R. Onishi S. Liu Q. Dong L. Wang M. Ichikawa (1999) J. Catal. 182 92
L. Wang R. Ohnishi M. Ichikawa (2000) J. Catal. 190 276
S. Liu R. Onishi M. Ichikawa (2003) J. Catal. 220 57
Z. Liu M.A. Nutt E. Iglesia (2002) Catal. Lett. 81 271
H. Ma R. Ohnishi M. Ichikawa (2003) Catal. Lett. 89 143
Y. Li L. Su H. Wang Y. Xu X. Bao (2003) Catal. Lett. 89 275
Y. Li H. Liu W. Shen X. Bao Y. Xu (2004) Stud. Surf. Sci. Catal. 147 583
M. Rubin and P. Chu, U.S. Patent No. 4954325 (1999)
Y. Shu Y. Xu L. Wang X. Guo (1997) J. Catal. 170 11
D. Ma Y. Shu X. Bao Y. Xu (2000) J. Catal. 189 314
D. Wang J.H. Lunsford M.P. Rosynek (1996) Topics Catal. 3 289
O. Levenspiel (1972) J. Catal. 25 265
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Li, Y., Wu, T., Shen, W. et al. Combined Single-pass Conversion of Methane Via Oxidative Coupling and Dehydro-aromatization. Catal Lett 105, 77–82 (2005). https://doi.org/10.1007/s10562-005-8008-y
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s10562-005-8008-y