The Effect of Crystal Size of SAPO-34 Synthesized Using Various Structure Directing Agents for MTO Reaction

다양한 구조 유도제로써 합성된 SAPO-34의 결정크기가 메탄올로부터 올레핀 전환반응(MTO)에 미치는 영향

  • Song, Young-Ha (Alternative Chemicals/Fuel Research Center, Korea Research Institute of Chemical Technology) ;
  • Chae, Ho-Jeong (Alternative Chemicals/Fuel Research Center, Korea Research Institute of Chemical Technology) ;
  • Jeong, Kwang-Eun (Alternative Chemicals/Fuel Research Center, Korea Research Institute of Chemical Technology) ;
  • Kim, Chul-Ung (Alternative Chemicals/Fuel Research Center, Korea Research Institute of Chemical Technology) ;
  • Shin, Chae-Ho (Department of Chemical Engineering, Chungbuk National University) ;
  • Jeong, Soon-Yong (Alternative Chemicals/Fuel Research Center, Korea Research Institute of Chemical Technology)
  • 송영하 (한국화학연구원 석유대체연구센터) ;
  • 채호정 (한국화학연구원 석유대체연구센터) ;
  • 정광은 (한국화학연구원 석유대체연구센터) ;
  • 김철웅 (한국화학연구원 석유대체연구센터) ;
  • 신채호 (충북대학교 화학공학과) ;
  • 정순용 (한국화학연구원 석유대체연구센터)
  • Received : 2008.08.21
  • Accepted : 2008.09.01
  • Published : 2008.10.10

Abstract

SAPO-34 is a well-known catalyst for methanol to olefins (MTO) process, but is rapidly deactivated by coke formation. It is necessary to improve the catalyst lifetime of SAPO-34 for MTO process. In the present work, SAPO-34 catalysts were synthesized with a variety of structure directing agent, and the physicochemical properties of the catalysts were examined by $N_2$-isotherm, XRD, SEM, and $NH_3$-TPD. It was found that mixed structure directing agents, especially DEA and TEAOH, gave well developed SAPO-34 crystal structure and reduced the crystal size and moderated acidity of SAPO-34 under the same synthetic conditions as that of various structure directing agents. Also, we could find that SAPO-34 catalyst prepared by mixed templates of DEA and TEAOH had the superior catalytic activity and the longer lifetime in MTO reaction.

Keywords

MTO;SAPO-34;structure directing agents;tetraethylammonium hydroxide;diethylamine

Acknowledgement

Grant : 메탄올 및 DME로부터 경질올레핀 제조 기술 개발

Supported by : 지식경제부

References

  1. P. Liu, J. Ren, and Y. Sun, Catal. Commum., 9, 1804 (2008) https://doi.org/10.1016/j.catcom.2008.01.030
  2. B. Parlitz, E. Schrerier, H. L. Zubowa, R. Eckelt, E. Lieschke, and R. Fricke, J. Catal., 155, 1 (1995) https://doi.org/10.1006/jcat.1995.1182
  3. J. Tan, Z. Liu, X. Bao, X. Liu, X. Han, C. He, and R. Zhai, Microp. Mesop. Mater., 53, 97 (2002) https://doi.org/10.1016/S1387-1811(02)00329-3
  4. X. Wu and R. G. Anthony, Appl. Catal. A.: Gen., 218, 241 (2001) https://doi.org/10.1016/S0926-860X(01)00651-2
  5. M. J. Kim, J. K. Jeon, Y. K. Park, Y. S. Ko, and J. M. Sohn, Korean Chem. Eng. Res., 45, 117 (2007)
  6. J. H. Kim and M. Niwa, J. Res. Inst. Catal., 18, 45 (2003)
  7. H. J. Chon and G. Seo, Int. Catal., 4th ed., Hanrimwon Publishing Co., Seoul (2002)
  8. S. C. Baek, Y. J. Lee, and K. W. Jun, Korean Chem. Eng. Res., 44, 345 (2006)
  9. G. Seo and B. G. Min, Korean Chem. Eng. Res., 44, 329 (2006)
  10. X. Wu, M. G. Abraha, and R. G. Anthony, Appl. Catal. A.: Gen., 260, 63 (2004) https://doi.org/10.1016/j.apcata.2003.10.011
  11. B. D. Han, C. H. Shin, P. A. Cox, and S. B. Hong, J. Phys. Chem. B., 110, 8188 (2006) https://doi.org/10.1021/jp0604138
  12. D. Chen, K. Moljord, T. Fuglerud, and A. Holmen, Microp. Mesop. Mater., 29, 191 (1999) https://doi.org/10.1016/S1387-1811(98)00331-X
  13. J. J. Pluth and J. V. Smith, J. Phys. Chem., 93, 6516 (1989) https://doi.org/10.1021/j100354a046
  14. G. Liu, P. Tian, Y. Zhang, J. Li, Lei, and Xu, S. Meng, Z. Liu, Microp. Mesop. Mater., 114, 416 (2008) https://doi.org/10.1016/j.micromeso.2008.01.030
  15. M. Stocker, Microp. Mesop. Mater., 29, 3 (1999) https://doi.org/10.1016/S1387-1811(98)00319-9
  16. Y. J. Lee, S. C. Baek, and K. W. Jun, Appl. Catal. A. Gen., 329, 130 (2007) https://doi.org/10.1016/j.apcata.2007.06.034