화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.9, No.3, 281-286, May, 2003
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12-Tungstophosphoric Acid Supported on Dealuminated USY as a Catalyst for Hydroisomerization of n-Heptane
Jun Wang1, 2, †, Zhen Lin1, Sang-Yun Han3, Minsik Eum3, and Chul Wee Lee3, †
  • 1Department of Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
  • 2Chemical Technology Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, China
  • 3Chemical Technology Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
E-mail:,
The dealuminated USY supported 12-tungstophosphoric acid was prepared and characterized by XRD, IR, NH3-TPD and nitrogen adsorption techniques. The Pt-bearing dealuminated USY supported 12-tungstophosphoric acid catalyst was measured in the hydroisomerization of n-heptane in an atmospheric fixed-bed microreactor. Comparative investigation was also carried out over USY or silica gel supported catalysts. The dealuminated USY supported 12-tungstophosphoric acid catalyst was found to exhibit the high catalytic activity in this reaction with a conversion of n-heptane at 29.8% and a selectivity for isomerization products at 94.1%, which is much higher than that of the 12-tungstophosphoric acid-free catalyst. The promotion effect of 12-tungstophosphoric acid was not observed over USY or silica gel supported catalysts. Both catalytic conversion and selectivity have been discussed in relation with the physical chemical property of catalysts.
Keywords:12-tungstophosphoric acid;USY;Hydroisomerization of n-Heptane;heteropoly acid;linear alkane
  1. Tromp M, van Bokhoven JA, Oostenbrink MTG, Bitter JH, de Jong KP, Koningsberger DC, J. Catal., 190(2), 209 (2000)
  2. Marcilly C, Stud. Surf. Sci. Catal., 135, 37 (2001)
  3. Chica A, Corma A, J. Catal., 187(1), 167 (1999)
  4. Liu Y, Koyano G, Misono M, Topics in Catal., 11-12, 239 (2000) 
  5. Misono M, Catal. Rev.-Sci. Eng., 29, 269 (1987)
  6. Misono M, Catal. Rev.-Sci. Eng., 30, 339 (1988)
  7. Hudec P, Prandova K, Collect. Czech. Chem. Commun., 60, 443 (1995)
  8. Wu Y, Ye XK, Yang XG, Wang XP, Chu WL, Hu YC, Ind. Eng. Chem. Res., 35(8), 2546 (1996)
  9. Marme F, Coudurier G, Vedrine JC, Microporous Mesoporous Mater., 22, 151 (1998)
  10. Pizzio LR, Caceres CV, Blanco MN, Appl. Catal. A: Gen., 167(2), 283 (1998)
  11. Molnar A, Keresszegi C, Torok B, Appl. Catal. A: Gen., 189(2), 217 (1999)
  12. Ghanbari-Siahkali A, Philippou A, Dwyer J, Anderson MW, Appl. Catal. A: Gen., 192(1), 57 (2000)
  13. Trolliet C, Coudurier G, Vedrine JC, Topics in Catal., 15, 73 (2001) 
  14. Sulikowski B, Haber J, Kubacka A, Pamin K, Olejniczak Z, Ptaszynski J, Catal. Lett., 39(1-2), 27 (1996)
  15. Mukai SR, Masuda T, Ogino I, Hashimoto K, Appl. Catal. A: Gen., 165(1-2), 219 (1997)
  16. Olejniczak Z, Sulikowski B, Kubacka A, Gasior M, Topics in Catal., 11-12, 391 (2000) 
  17. Mukai SR, Lin L, Masuda T, Hashimoto K, Chem. Eng. Sci., 56(3), 799 (2001)
  18. Wang J, Huang LM, Chen HY, Li QZ, Catal. Lett., 55(3-4), 157 (1998)
  19. Hughes TR, White HM, J. Phys. Chem., 71, 2192 (1967)
  20. Makarova MA, Dwyer J, J. Phys. Chem., 97, 6337 (1993)
  21. Sasaki Y, Suzuki T, Takamura Y, Saji A, Saka H, J. Catal., 178(1), 94 (1998)
  22. Wang J, Li QZ, Yao JD, Appl. Catal. A: Gen., 184(2), 181 (1999)
  23. Alvarez F, Fiannetto G, Guisnet M, Perot G, Appl. Catal., 34, 353 (1987) 
  24. Martens JA, Jacobs PA, Zeolites, 6, 334 (1986)
  25. Taylor RJ, Petty RH, Appl. Catal. A: Gen., 119(1), 121 (1994)
  26. Alvarez F, Ribeiro FR, Perot G, Thomazeau C, Guisnet M, J. Catal., 162(2), 179 (1996)
  27. Chang W, Lee CH, Kim MY, Ahn BJ, J. Ind. Eng. Chem., 7(2), 121 (2001)