화학공학소재연구정보센터
Korean Journal of Chemical Engineering, Vol.34, No.4, 997-1003, April, 2017
Catalytic performance of CeAPSO-34 molecular sieve with various cerium content for methanol conversion to olefin
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A series of CeAPSO-34s with various cerium contents was synthesized and characterized by multiple techniques such as XRD, SEM, BET, 29Si MAS NMR, NH3-TPD and CO2-TPD. NH3-TPD spectra showed that a number of acid sites, especially those of strong acidity, is reduced with the increasing of Ce incorporation. Incorporation of metal ions gave rise to more silica-islands in the CeAPSO-34 framework. CO2-TPD showed that basic sites on the surface of modified samples are due to the presence of Ce-containing species incorporation into the framework of CeAPSO-34 molecular sieves. The performance of the catalysts was studied in methanol to olefin reactions at 425 °C under the atmospheric pressure. The results showed that the incorporation of cerium ions had great effects on the structure and acidity of the molecular sieves. All SAPO-34 and MeAPSO-34 molecular sieves were the very active and selective catalyst for light olefins production. Cerium incorporation improved the catalyst lifetime and favored the ethylene and propylene generation. However, an excess Ce content resulted in an inferior catalytic performance and stability. Therefore, there existed optimal cerium content for a specific SAPO-34.
  1. Sedighi M, Ghasemi M, Mohammadi M, Hassan SHA, RSC Adv., 4, 28390 (2014)
  2. Park TY, Froment GF, Ind. Eng. Chem. Res., 43(3), 682 (2004)
  3. Sedighi M, Keyvanloo K, Towfighi J, Ind. Eng. Chem. Res., 50(3), 1536 (2011)
  4. Sedighi M, Towfighi J, Fuel, 153, 382 (2015)
  5. Cannan TR, Flanigen EM, Gajek RT, Lok BM, Messina CA, Patton RL, Google Patents (1984).
  6. Yu T, Wang J, Shen M, Li W, Catal. Sci. Technol., 3, 3234 (2013)
  7. Iwase Y, Motokura K, Koyama T, Miyaji A, Baba T, Phys. Chem. Chem. Phys., 11, 9268 (2009)
  8. Li Z, Triguero JM, Concepcion P, Yu J, Corma A, Phys. Chem. Chem. Phys., 15, 14670 (2013)
  9. Valle B, Alonso A, Atutxa A, Gayubo AG, Bilbao J, Catal. Today, 106(1-4), 118 (2005)
  10. Wei Y, He Y, Zhang D, Xu L, Meng S, Liu Z, Su BL, Microporous Mesoporous Mater., 90, 188 (2006)
  11. Hartmann M, Kevan L, Res. Chem. Intermed., 28, 625 (2002)
  12. Inui T, Kang M, Appl. Catal. A: Gen., 164(1-2), 211 (1997)
  13. Sun HN, Vaughn SN, Google Patents (1999).
  14. Weckhuysen BM, Verberckmoes AA, Uytterhoeven MG, Mabbs FE, Collison D, de Boer E, Schoonheydt RA, J. Phys. Chem. B, 104(1), 37 (2000)
  15. Lu JZ, Wang XP, Li HB, React. Kinet. Catal. Lett., 97(2), 255 (2009)
  16. Tian S, Ji S, Lu D, Bai B, Sun Q, J. Energy Chem., 22, 605 (2013)
  17. Xiaoning W, Zhen Z, Chunming X, Aijun D, Li Z, Guiyuan J, J. Rare Earths, 25, 321 (2007)
  18. Sedighi M, Ghasemi M, Sadeqzadeh M, Hadi M, Powder Technol., 291, 131 (2016)
  19. Lok BM, Messina CA, Patton RL, Gajek RT, Cannan TR, Flanigen EM, J. Am. Chem. Soc., 106, 6092 (1984)
  20. Salmasi M, Fatemi S, Najafabadi AT, J. Ind. Eng. Chem., 17(4), 755 (2011)
  21. Alvaro-Munoz T, Marquez-Alvarez C, Sastre E, Catal. Today, 179(1), 27 (2012)
  22. Sedighi M, Towfighi J, Mohamadalizadeh A, Powder Technol., 259, 81 (2014)
  23. Sastre G, Lewis DW, Catlow CR, J. Phys. Chem. B, 101(27), 5249 (1997)
  24. Zanjanchi MA, Ghanadzadeh A, Khadem-Nahvi F, J. Inclusion Phenom. Mol. Recognit. Chem., 42, 295 (2002)
  25. Hutchings GJ, Hunter R, Catal. Today, 6, 279 (1990)
  26. Sedighi M, Bahrami H, Towfighi J, J. Ind. Eng. Chem., 20(5), 3108 (2014)
  27. Aguayo AT, Gayubo AG, Vivanco R, Olazar M, Bilbao J, Appl. Catal. A: Gen., 283(1-2), 197 (2005)
  28. Stocker M, Microporous Mesoporous Mater., 29, 3 (1999)