Advertisement

Effect of gamma-irradiation on surface and catalytic properties of nanocrystalline CuO, NiO and Fe2O3 supported on alumina

  • G. A. El-Shobaky
  • M. M. Doheim
  • S. A. Esmail
  • H. A. El-Boohy
  • A. M. Ahmed
Article

Abstract

The effect of γ-irradiation on surface and catalytic properties of CuO/Al2O3, NiO/Al2O3 and Fe2O3/Al2O3 was investigated. The techniques employed were XRD, nitrogen adsorption at −196 °C and catalytic conversion of ethanol and isopropanol at 250–400 °C using micropulse technique. The results showed that the supported solids being calcined at 400 °C consisted of well crystallized CuO, NiO, Fe2O3 and AlOOH phases. The AlOOH crystallized into a poorly crystalline γ-Al2O3 upon heating at 600 °C. All phases present in different solids calcined at 400 and 600 °C showed that these solids are of nanocrystalline nature measuring an average crystallite size between 6 and 85 nm. The crystallite size of crystalline phases present was found to be much affected by the dose of γ-rays and the nature of the metal oxide. This treatment resulted in a progressive increase in the specific surface area reaching to a maximum limit at a dose of 0.8 MGy. The dose of 1.6 MGy exerted a measurable decrease in the S BET. A radiation dose of 0.2 to 0.8 MGy brought about a progressive significant decrease in the catalytic activity of all the catalytic systems investigated. All the catalytic systems retained their high activity upon exposure to a dose of 1.6 MGy. The rise in precalcination temperature of the systems investigated from 400 to 600 °C brought about a measurable increase in their catalytic activity in the conversion of alcohols.

Keywords

Crystallite Size Dehydrogenation Calcination Temperature Catalytic System Catalytic Conversion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    N. Z. Muradov, Intern. J. Hydrogen Energy, 18 (1993) 211.CrossRefGoogle Scholar
  2. 2.
    A. C. B. Dos Santos, W. B. Kover, A. C. Faro, Appl. Catal., A153 (1997) 83.Google Scholar
  3. 3.
    T. Zhang, M. D. Amiridis, Appl. Catal., A163 (1998) 161.Google Scholar
  4. 4.
    S. Velu, M. F. Stephanopoloulos, Appl. Catal., A162 (1997) 81.Google Scholar
  5. 5.
    G. A. El-Shobaky, A. N. Al-Noaimi, Appl. Catal., A29 (1987) 235.Google Scholar
  6. 6.
    M. F. Luo, Y. J. Zhong, X. X. Uan, X. M. Zheng, Appl. Catal., A162 (1997) 121.Google Scholar
  7. 7.
    G. A. El-Shobaky, A. S. Ahmed, M. M. Mokhtar, J. Radioanal. Nucl. Chem., 219 (1997) 89.CrossRefGoogle Scholar
  8. 8.
    G. A. El-Shobaky, F. M. Radwan, A. M. Turky, A. Abd-El-Moemen, Adsorb. Sci. Technol., 19 (2001) 779.CrossRefGoogle Scholar
  9. 9.
    A. Golchet, J. M. Wgite, J. Catal., 53 (1978) 266.CrossRefGoogle Scholar
  10. 10.
    A. M. Youssef, S. A. El-Hakam, G. A. El-Shobaky, Radiat. Phys. Chem., 40 (1992) 575.Google Scholar
  11. 11.
    F. M. T. Mendes, M. Schmal, Appl. Catal., A163 (1997) 153.Google Scholar
  12. 12.
    H. Li, J. F. Ding, Appl. Catal., A193 (2000) 9.Google Scholar
  13. 13.
    H. G. El-Shobaky, H. A. El-Boohy, M. M. Doheim, Adsorp. Sci. Technol., 18 (2000) 749.CrossRefGoogle Scholar
  14. 14.
    G. A. El-Shobaky, M. M. Doheim, A. M. Ghozza, H. A. El-Boohy, Mater. Lett., 57 (2002) 525.CrossRefGoogle Scholar
  15. 15.
    G. A. El-Shobaky, M. M. Doheim, A. M. Turky, H. A. El-Boohy, J. Radioanal. Nucl. Chem., 256 (2003) 107.CrossRefGoogle Scholar
  16. 16.
    H. A. El-Boohy, M. M. Doheim, G. A. El-Shobaky, Afinidad, 59 (2002) 497.Google Scholar
  17. 17.
    M. M. Doheim, H. A. El-Boohy, G. A. El-Shobaky, Adsorp. Sci. Technol., 19 (2001) 635.CrossRefGoogle Scholar
  18. 18.
    M. M. Doheim, H. A. El-Boohy, M. Mokhtar, G. A. El-Shobaky, Adsorb. Sci. Technol., 19 (2001) 751.CrossRefGoogle Scholar
  19. 19.
    M. M. Doheim, A. S. Ahmed, H. A. El-Boohy, G. A. El-Shobaky, J. Radioanal. Nucl. Chem., 254 (2002) 583.CrossRefGoogle Scholar
  20. 20.
    A. Andreev, V. Kafedzhiiski, T. Kunev, V. Kalchev, Appl. Catal., 78 (1991) 99.Google Scholar
  21. 21.
    C. N. Spalaris, L. P. Bupp, E. C. Gilbert, J. Phys. Chem., 61 (1957) 350.CrossRefGoogle Scholar
  22. 22.
    N. H. Amin, G. A. El-Shobaky, G. A. Fagal, J. Radioanal. Nucl. Chem., 177 (1994) 211.CrossRefGoogle Scholar
  23. 23.
    G. A. El-Shobaky, G. A. Fagal, N. Petro, A. M. Dessouki, Radiat. Phys. Chem., 29 (1987) 39.Google Scholar
  24. 24.
    G. A. El-Shobaky, A. S. Ahmed, H. G. El-Shobaky, J. Radioanal. Nucl. Chem., 185 (1994) 23.Google Scholar
  25. 25.
    G. A. El-Shobaky, A. M. El-Shaabiny, A. A. Ramadan, A. M. Dessouki, Radiat. Phys. Chem., 34 (1989) 787.Google Scholar
  26. 26.
    G. A. El-Shobaky, A. M. El-Shaabiny, A. A. Ramadan, A. M. Dessouki, Radiat. Phys. Chem., 30 (1987) 233.Google Scholar
  27. 27.
    P. H. Bolt, S. F. Lobner, T. P. Bout, J. W. Geus, F. H. P. M. Habarken, Appl. Surf. Sci., 70/71 (1993) 196.CrossRefGoogle Scholar
  28. 28.
    P. H. Bolt, F. H. P. M. Harbarken, J. W. Geus, Catal. Deactiv., 88 (1994) 425.Google Scholar
  29. 29.
    P. H. Bolt, M. E. Van Ipenburg, J. W. Geus, F. H. P. M. Habarken, Mater. Res. Symp. Proc., 334 (1994) 15.Google Scholar
  30. 30.
    B. D. Cullity, Elements of X-ray Diffraction, 3 ed, Addison-Wesley, Reading MA, 1967.Google Scholar
  31. 31.
    R. Brunauer, E. Mikhail, E. Bodor, Colloid Interface Sci., 24 (1967) 351.CrossRefGoogle Scholar
  32. 32.
    G. A. El-Shobaky, M. M. Doheim, A. M. Ghozza, Radiat. Phys. Chem., 69 (2004) 31.CrossRefGoogle Scholar
  33. 33.
    M. R. Mostafa, A. M. Youssef, A. M. Hassan, Mater. Lett., 12 (1991) 207.CrossRefGoogle Scholar
  34. 34.
    A. M. Youssef, G. A. El-Shobaky, Th. El-Nabarawy, N. H. Amin, J. Serbian Chem. Soc., 55 (1990) 121.Google Scholar

Copyright information

© Springer Science+Business Media, LLC. 2007

Authors and Affiliations

  • G. A. El-Shobaky
    • 1
  • M. M. Doheim
    • 2
  • S. A. Esmail
    • 3
  • H. A. El-Boohy
    • 3
  • A. M. Ahmed
    • 3
  1. 1.National Research Center (NRC)Dokki, CairoEgypt
  2. 2.Egyptian Petroleum Research Institute (EPRI)Nasr City, CairoEgypt
  3. 3.National Center for Radiation Research and Technology (NCRRT)Nasr City, CairoEgypt

Personalised recommendations