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A Facile and Effective Method for the Distribution of Mo/HZSM-5 Catalyst Active Centers

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Abstract

Post-steaming treatment of Mo/HZSM-5 catalysts results in more molybdenum species migrating into and residing in the HZSM-5 zeolite channels. This is confirmed by XRF and XPS measurements. 1H MAS NMR and 29Si MAS NMR also demonstrate that the number of free Brönsted acid sites decreases in the Mo/HZSM-5 catalysts that underwent post-steaming treatment, compared to untreated Mo/HZSM-5 catalysts. As a result, the deactivation rate constant (k d) on the Mo/HZSM-5 catalyst after post-steaming treatment for 0.5h is much smaller, and the catalyst therefore shows remarkable stability in the probe reaction of methane dehydro-aromatization. The results suggest that a more beneficial bi-functional balance between active Mo species for methane activation and acid sites for the following aromatization is developed over those Mo/HZSM-5 catalysts that have experienced post-steaming treatment for 0.5h, in comparison with the untreated Mo/HZSM-5 catalysts.

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References

  1. Y. D. Xu and L. W. Lin, Appl. Catal., A188 (1999) 53.

    Google Scholar 

  2. Y. D. Xu, X. H. Bao and L. W. Lin, J. Catal. 2002; in press.

  3. W. Ding, G. D. Meitzner and E. Iglesia, J. Catal. 206 (2002) 14.

    Google Scholar 

  4. Y. Lu, D. Ma, Z. Xu, Z. Tian, X. Bao and L. Lin, Chem Commun. 20 (2001) 2048.

    Google Scholar 

  5. D. Ma, Y. Lu, L. Su, Z. Xu, Z. Tian, Y. Xu, L. Lin and X. Bao, J. Phys. Chem. B106 (2002) 8524.

    Google Scholar 

  6. Y. Shu, R. Ohnishi and M. Ichikawa, Catal. Lett. 81 (2002) 9.

    Google Scholar 

  7. D. Ma, Y. Y. Shu, X. H. Bao and Y. D. Xu, J. Catal. 189 (2000) 314.

    Google Scholar 

  8. Y. Y. Shu, D. Ma, X. H. Bao and Y. D. Xu, Catal. Lett. 66 (2000) 161.

    Google Scholar 

  9. J. L. G. Fierro, J. C. Conesa and A. López Agudo, J. Catal. 108 (1987) 334.

    Google Scholar 

  10. M. Huang, J. Yao and S. Xu, Zeolites 12 (1992) 810.

    Google Scholar 

  11. W. Li, G. D. Meitzner, R. W. Borry, III and E. Iglesia, J. Catal. 191 (2000) 373.

    Google Scholar 

  12. R. W. Borry III, Y. H. Kim, A. Huffsmith, J. A. Reimer and E. Iglesia, J. Phys. Chem. B103 (1999) 5787.

    Google Scholar 

  13. M. Hunger, Catal. Rev. Sci. Eng. 39 (1997) 345.

    Google Scholar 

  14. O. Levenspiel, J. Catal. 25 (1972) 265.

    Google Scholar 

Download references

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Authors and Affiliations

  1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, 457 Zhongshan Road, P.O. Box 110, Dalian, 116023, China

    Hongxia Wang, Gang Hu, Hao Lei, Yide Xu & Xinhe Bao

Authors
  1. Hongxia Wang
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  2. Gang Hu
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  3. Hao Lei
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  4. Yide Xu
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  5. Xinhe Bao
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Wang, H., Hu, G., Lei, H. et al. A Facile and Effective Method for the Distribution of Mo/HZSM-5 Catalyst Active Centers. Catalysis Letters 89, 75–79 (2003). https://doi.org/10.1023/A:1024771410249

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