Development of thermostable composition of Al2O3–Ce0,75Zr0,25O2 for use in three-ways exhaust cars gas cleaning catalyst

Modern three-route catalysts operate at high temperature exhaust gas as high as 1000 °C, so the development of thermostable formulations relevant. In this paper the method of direct deposition of a number of composite Al2O3–Ce0,75Zr0,25O2 synthesized Al2O3 content 0, 10, 25, 50 wt.%. Composites are freshly prepared and after calcination in air at 1000 and 1100 °C were studied by BET, XRD, TEM, TPR. Next, using composites, aged at 1050 °C in an atmosphere of 2 % O2 + 10 % H2O + 88 % N2. Block prepared catalysts, oxygen capacity (OSC) and the activity is studied in the gas analytical stand. With the increase in the proportion of Al2O3 composites increases the uniformity of mixing and dispersion of particles CexZr1–xO2–δ, their chemical composition is homogeneous, the amount of cerium involved in oxidation-reduction, increases. The composite containing 50 wt.% Al2O3, is made up of individually mixed crystallites CexZr1–xO2–δ, and Al2O3, whose dimensions are virtually unchanged during calcination. The catalyst (Pt/Al2O3 + Al2O3–Ce0,75Zr0,25O2) on the basis of the composite is characterized by the OSC and the highest activity, it can be recommended composite for industrial testing.

1. Gandhi H.S., Graham G.W., McCabe R.W. // Journal of Catalysis. 2003. Vol. 216. P.433.

2. Favre C., Zidat S. SAE Technical Paper Series 2004-01-0138.

3. Perrichon V., Laachir A., Abouarnadasse S., Touret O., Blanchard G. // Applied Catalysis A: General. 1995.

4. Vol. 129. P.69.

5. Ivanov V.K., Polezhaeva O.S., Baranchikov A.E., Shcherbakov A.B. // Inorganic Materials. 2010. Vol. 46, No. 1. P. 43.

6. Trovarelli A. // Catal. Rev.-Sci. Eng. 1996. Vol. 38. P. 439.

7. Madier Y., Descorme C., Le Govic A. M., Duprez D. //Journal of Physical Chemystry B. 1999. Vol. 103. P.10999.

8. Fornasiero P., Di Monte R., Ranga Rao G., Kaspar J., Meriani S., Trovarelli A., Graziani M. // Journal of Catalysis. 1995. Vol. 151. P. 168.

9. Cuif J.P., Blanchard G., Touret O., Seigneurin, A., Marczi M., Quemere E. SAE Technical Paper Series 1997. 970463.

10. Bozo C., Gaillard F., Guilhaume N. // Applied Catalysis A: General. 2001. Vol. 220. P. 69.

11. Burtin P., Brunelle J.P., Pijolat M., Soustelle M. // Applied Catalysis. 1987. Vol. 34. P. 225.

12. Ismagilov Z.R., Shkrabina R.A., Koryabkina N.A., Arendarskii D.A., Shikina N.V. // Studies in Surface Science and Catalysis. 1998. Vol. 116. P. 507.

13. Chuech J.S., Cant N.W. // Applied Catalysis A: General. 1993. Vol. 101. Р. 105.

14. Monte R.D., Fornasiero P., Kaspar J., Graziani M. // Studies in Surface Science and Catalysis. 2001. Vol. 140.

15. P. 229.

16. Wei Z., Li H., Zhang X., Yan S., Zhen L., Chen Y., Gong M. // Journal of Alloys and Compounds. 2008. Vol. 455. P. 322.

17. Yao M.H., Baird R. J., Kunz F.W., Hoost T.E. // Journal of Catalysis. 1997. Vol. 166. P. 67.

18. Morikawa A., Suzuki T., Kanazawa T., Kikuta K., Suda A., Shinjo H. //Applied Catalysis B: Environ. 2008. Vol. 78. P. 210.

19. Chuang C., Hsiang H., Hwang J. S., Wang T. S. // Journal of Alloys and Compounds. 2009. Vol. 470. P. 387.

20. Порсин А.В., Аликин Е.А., Данченко Н.М. , Рычков В.Н., Смирнов М.Ю., Бухтияров В.И. // Катализ в промышленности. 2007. № 6. C. 39–45.

21. Speight J.G. Lange’s Handbook of Chemistry. 16th Edition: New York: McGraw-Hill, 1999.

22. Yao H.C., Yu Y. // Journal of Catalysis. 1984. Vol. 86. P. 254.

23. Nagai Y., Nonaka T., Suda A., Sugiura M. // R&D Review of Toyota CRDL. 2002. V. 37. N. 4. P. 20.

24. Hori C.E., Permana H., Ng K.Y.S., Brenner A, More K., Rahmoeller K.M., Belton D.N. // Applied Catalysis B:Environ. 1998. V.16. P. 105.