Acidic Properties of Tungsten Oxide Supported on Zirconia and Catalytic Activities for Acid Catalysis

Zirconia에 담지된 산화텅스텐 촉매의 산 성질과 산 촉매활성

  • Sohn, Jong Rack (Department of Industrial Chemistry, Engineering College, Kyungpook National University) ;
  • Park, Man Young (Department of Industrial Chemistry, Engineering College, Kyungpook National University)
  • 손종락 (경북대학교 공과대학 공업화학과) ;
  • 박만영 (경북대학교 공과대학 공업화학과)
  • Received : 1998.09.07
  • Accepted : 1998.11.23
  • Published : 1999.04.10

Abstract

Tungsten oxide supported on zirconia was prepared by drying powdered $Zr(OH)_4$ with ammonium metatungstate aqueous solution, followed by calcining in air at high temperature. Upon the addition of only small amount of tungsten oxide (1 wt % $WO_3$) to $ZrO_2$, both the acidity and acid strength of catalyst increased remarkably, showing the presence of $Br{\ddot{o}}nsted$ and Lewis acid sites on the surface of $WO_3$/$ZrO_2$. The high acid strength and large amount of acid sites on $WO_3$/$ZrO_2$ were due to the presence of the W=O bond nature of complex formed by the interaction between $WO_3$ and $ZrO_2$. The catalyst containing 20 wt % $WO_3$, calcined at 973 K, showed the highest catalytic activity for the 2-propanol dehydration, while the catalyst containing 15 wt % $WO_3$, calcined at 1023 K, exhibited the highest catalytic activity for the cumene dealkylation. For the 2-propanol dehydration the catalytic activities of $WO_3$/$ZrO_2$ catalysts were roughly correlated with their acidities.

Keywords

Tungsten Oxide;Acidic Properties;Zirconia;2-propanol dehydration;Cumene dealkylation

Acknowledgement

Supported by : 한국과학재단

References

  1. J. Catal. v.150 D. A. Ward;E. I. Ko
  2. J. Chem. Soc. Chem. Commun. C. Y. Hsu;C. R. Heimbuch;C. T. Armes;B. C. Gates
  3. Catal. Lett. v.29 A. S. Zarkalis;C. Y. Hsu;B. C. Gates
  4. J. Catal. v.130 K. Ebitani;J. Konishi;H. Hattori
  5. J. Chem. Soc. Chem. Commun. M. Hino;K. Arata
  6. J. Catal. v.127 A. G. Basrur;S. R. Patwardham;S. N. Vyas
  7. J. Catal. v.79 L. L. Murrell;D. C. Grenoble;R. T. K. Baker;E. B. Prestridge;S. C. Fung;R. R. Hianelli;S. P. Cramer
  8. J. Phys. Chem. v.84 A. J. Roosnaiern;D. Koster;j. C. Moi
  9. J. Catal. v.107 W. Grunert;E. S. Shpiro;R. Feldhaus;K. Anders;G. V. Antoshin;K. M. Minachev
  10. J. Catal. v.2 E. P. Parry
  11. J. Mol. Catal. v.93 J. R. Sohn;H. J. Jang;M. Y. Park;E. H. Park;S. E. Park
  12. Langmuir v.9 J. R. Sohn;S. G. Ryu
  13. J. Catal. v.101 J. R. Sohn;H. J. Kim
  14. Appl. Catal. A : General v.164 J. R. Sohn;S. Y. Lee
  15. Proc. 11th Int. Conger. Catal. G. Larsen;E. Lotero;R. D. Parra
  16. Preper. Symp. Div. Petr. Chem. T. Hosoi;T. Shimadzu;S. Ito;S. Baba;H. Takaoka;T. Imai;N. Yokoyama
  17. Science v.206 F. G. A. Olah;G. K. S. Prakash;J. Sommer
  18. J. Ind. Eng. Chem. v.4 J. R. Sohn;M. Y. Park
  19. J. Catal. v.150 L. M. Kustov;V. B. Kazansky;F. Figueras;D. Tichit
  20. J. Catal. v.159 J. R. Sohn;S. G. Cho;Y. L. Pae;S. Hayashi
  21. Catal. Lett. v.41 F. C. Lange;T. K. Cheung;B. C. Gates
  22. New Solid Acids and Bases K. Tanabe;M. Misono;Y. Ono;H. Hattori
  23. J. Catal. v.101 S. J. Decanio;J. R. Sohn;P. O. Paul;J. H. Lunsford
  24. J. Catal. v.162 L. Karakonstantis;K. Bourikas;A. Lycourghiotis
  25. Catal. Lett. v.31 T. K. Cheung;J. L. d'Itri;F. C. Lange;B. C. Gates
  26. Adv. Catal. v.37 K. Arata