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Tytuł artykułu
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Warianty tytułu
Języki publikacji
Abstrakty
Samples of 5 wt.% Pd/SiO2 catalyst reduced at moderate (400 graduateC) and high temperature (600 graduate C) were investigated in the reaction of 1,2-dichloroethane hydrodechlorination (HDC). The highly reduced catalyst exhibited a higher selectivity towards ethylene, approaching 70% at 300 graduate C, whereas the catalyst reduced at 400 graduateC gave mainly ethane (SC2H6 ~90% at 300 graduate C). Reduction of Pd/SiO2 at 600 graduate C leads to the formation of palladium silicide. In consequence, incorporation of Si in Pd surface lowers the hydrogenating strength of palladium, contributing to a higher ethylene selectivity. Such a behaviour resembles an analogous situation with Pd modified by Ag. It was shown that the catalysts deactivated rapidly at temperatures between 200 and 300 graduate C. After reaction, much larger amounts of carbon were found in the sample reduced at 400 graduate C. X-ray diffraction studies showed that a considerable part of this carbon was located in the bulk of palladium phase, i.e. forming a PdCx solution.
Wydawca
Czasopismo
Rocznik
Tom
Strony
1841--1848
Opis fizyczny
Bibliogr. 20 poz., rys.
Twórcy
autor
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, PL-01224 Warszawa, Poland
autor
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, PL-01224 Warszawa, Poland
autor
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, PL-01224 Warszawa, Poland
- Department of Mathematics and Natural Sciences, Cardinal Stefan Wyszyñski University, ul. Dewajtis 5, PL-01 815 Warszawa, Poland
Bibliografia
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- 4. Vadlamannati L.S., Luebke D.R., Kovalchuk V.I. and d’ltri J.L., Stud. Surf. Sci. Catal., 130,233 (2000).
- 5. Heinrichs B., Delhez P., Schoebrechts J.-P. and Pirard J.-P., J. Catal., 172, 322 (1997).
- 6. Heinrichs B., Schoebrechts J.-P. and Pirard J.-P., Stud. Surf. Sci. Catal., 130, 2015 (2000).
- 7. Heinrichs B., Schoebrechts J.-P. and Pirard J.-P., J. Catal., 200, 309 (2001).
- 8. Chang C.-C., Reo C.M. and Lund C.R.F., Appl. Catal. B, 20, 309 (1999).
- 9. Sotowa C., Watanabe Y., Yatsunami S., Korai Y. and Mochida I., Appl Catal. A, 180, 317 (1999).
- 10. Frankel K.A., Jang B.W.-L., Spivey J.J. and Roberts G.W., Appl. Catal. A, 205, 263 (2001).
- 11. Frankel K.A., Jang B.W.-L., Roberts G.W. and Spivey ].i.,Appl. Catal. A, 209, 401 (2001).
- 12. Choi Y.H. and Lee W.Y., J. Mol. Catal. A, 174, 193 (2001).
- 13. Juszczyk W. and Karpiński Z., J. Catal, 117, 519 (1989).
- 14. Juszczyk W., Karpiński Z., Pielaszek J. and Sobczak J.W., New J. Chem., 17, 573 (1993).
- 15. Juszczyk W., Łomot D., Pielaszek J. and Karpiński Z., Catal. Lett., 78, 95 (2002).
- 16. Juszczyk W., Karpiński Z., Łomot D. and Pielaszek J., J. Catal, after proofs.
- 17. Łomot D., Polish J. Chem., 72, 2598 (1998).
- 18. Juszczyk W., Malinowski A. and Karpiński Z., Appl. Catal, A, 166, 311 (1998).
- 19. Bonarowska M., Pielaszek J., Semikolenov V.A. and Karpiński Z., J. Catal., 209, 528 (2002).
- 20. Flanagan T.B., Noh H., Craft A. and Andersson Y., J. Solid State Chem., 120, 90 (1995).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ1-0024-0167