Hostname: page-component-84b7d79bbc-c654p Total loading time: 0 Render date: 2024-07-30T12:23:21.612Z Has data issue: false hasContentIssue false
  • English
  • Français

The High Dispersion of CuCl2 in ZSM-5 by Using Microwave Method

Published online by Cambridge University Press:  15 February 2011

Feng-Shou Xiao ,
Wenguo Xu ,
Shilun Qru  and
Ruren Xu
Feng-Shou Xiao
Affiliation:
Department of Chemistry, Jilin University, Changchun 130023, People's Republic of China
Wenguo Xu
Affiliation:
Department of Chemistry, Jilin University, Changchun 130023, People's Republic of China
Shilun Qru
Affiliation:
Department of Chemistry, Jilin University, Changchun 130023, People's Republic of China
Ruren Xu
Affiliation:
Department of Chemistry, Jilin University, Changchun 130023, People's Republic of China
Get access

Abstract

Three preparation methods of ZSM-5 supported copper were studied. The first sample is the mechanical mixture of CuCl2·2H2O with NaZSM-5 (Cu+ZSM-5), the second sample is the mechanical mixture of CuCl2·2H2O with NaZSM-5 followed by microwave treatment (Cu/ZSM-5), and the third sample is copper ion exchanged with NaZSM-5 (CuZSM-5). All the samples were characterized by XRD, DTA, and n-hexane adsorption. Cu+ZSM-5 samples showed characteristic XRD peaks of both NaZSM-5 and CuCl2·2H2O and Cu/ZSM-5 samples showed only NaZSM-5 XRD peaks; these results suggest that CuCl2·2H2O no longer exists in the crystalline state in Cu/ZSM-5 samples, possibly in a highly dispersed state. DTA experiments showed that Cu+ZSM-5 samples did exhibit the melting point of CuCl2 and Cu/ZSM-5 did not. Furthermore, as compared with Cu+ZSM-5 and CuZSM-5, the n-hexane adsorption on Cu/ZSM-5 samples require higher n-hexane pressure to reach the saturated adsorption; these results suggest that the copper salt has entered the zeolite channels during microwave treatment, resulting in the change of channel circumstance for ZSM-5 zeolite. All these results suggest that microwave technique is a potential method for preparing highly dispersed metal salts in the channels or cages of zeolites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 344: Symposium I – Materials and Processes for Environmental Protection , 1994 , 139
Copyright
Copyright © Materials Research Society 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Iwamoto, M., Furukawa, H., , S. and Kagawa, S., in New Developments in Zeolite Science & Technology, edited by Murakami, Y., lijima, A., and Ward, J.W. (Elsevier, Amsterdam, 1986).Google Scholar
2. Iwamoto, M., in Future Opportunities in Catalytic and Separation Technology, edited by Misono, M., Moro-oka, Y., and Kimura, S. (Elsevier, Amsterdam, 1990).Google Scholar
3. Iwamoto, M., Yahiro, H., Tanada, K., Mizuno, N., Mine, Y., and Kagawa, S., , S., J. Phys. Chem., 95, 3727 (1991).Google Scholar
4. Li, Y., and Hall, W. K., J. Catal., 129, 202 (1991).Google Scholar
5. Valyon, J., , J., and Hall, W. K., Catal. Lett., 19, 109 (1993).Google Scholar
6. Sarkany, J., D'Itri, J. L., and Sachtler, W. M. H., Catal. Lett., 16, 241 (1992).Google Scholar
7. Mingos, D. M. P., and Baghurst, D. R., Chem. Soc. Rev., 20, 1 (1991).Google Scholar
8. Meng, X.P., Xu, W.G., Tang, S.Q., and Pang, W.Q., Chinese Chem. Lett., 3, 69 (1992).Google Scholar
9. Song, T.-Y., , T.-Y., and Xu, R. -R., , R.-R., J. Solid State Chem., 88 (1990) 577.Google Scholar
10. Xie, Y.-C., and Tang, Y. Q., Adv. Catal., 37, 1 (1990).Google Scholar
11. Xie, Y. C., Zhang, H. X., and Wang, R. H., Sci. Sin. (Chin. Ed.), 337 (1980); Sci. Sin. (Engl. Ed.), 23, 980 (1980).Google Scholar
12. Millar, G. L., Rochester, C. H., and Wangh, K.C., J. Chem. Soc., Faraday Trans., 87, 1467 (1991).Google Scholar
13. Huang, Y.-Y., J. Am. Chem. Soc., 95, 6636 (1973).Google Scholar