화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.19, No.5, 559-567, October, 2008
Export Citation
다양한 구조 유도제로써 합성된 SAPO-34의 결정크기가 메탄올로부터 올레핀 전환반응(MTO)에 미치는 영향
The Effect of Crystal Size of SAPO-34 Synthesized Using Various Structure Directing Agents for MTO Reaction
송영하1, 2, 채호정1, 정광은1, 김철웅1, 신채호2, 정순용1, †
  • 1한국화학연구원 석유대체연구센터, 대전 305-600
  • 2충북대학교 화학공학과, 충북 361-763
Young-Ha Song1, 2, Ho-Jeong Chae1, Kwang-Eun Jeong1, Chul-Ung Kim1, Chae-Ho Shin2, and Soon-Yong Jeong1, †
  • 1Alternative Chemicals/Fuel Research Center, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
  • 2Department of Chemical Engineering, Chungbuk National University, Chungbuk 361-763, Korea
E-mail:
초록
SAPO-34 촉매는 메탄올에서 올레핀 전환반응에서 세공크기가 작아 코크침적에 대한 비활성화가 촉진됨에 따라 촉매의 수명증진이 요구된다. 본 연구에서는 촉매의 수명증진을 위해 다양한 구조 유도제로 합성된 SAPO-34 촉매의 특성을 비교하기 위하여 질소 흡착-탈착 등온선, X-선 회절 분석(XRD), 주사 전자현미경(SEM), 암모니아 승온탈착(NH3-TPD) 등을 이용하여 분석하였으며, 또한 MTO 전환반응 실험을 수행하였다. 합성시 구조 유도제에 따른 결정크기의 감소와 산특성의 변화와, 결정크기가 MTO 전환반응에 미치는 영향을 관찰할 수 있었다. 특히 DEA와 TEAOH 구조 유도제를 혼합 사용한 SAPO-34 촉매는 0.5 μm 정도의 균일한 결정크기를 갖으며, 산특성의 최적화로 가장 우수한 MTO 반응성을 보였으며 촉매의 수명이 향상됨을 알 수 있었다.
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 N2-isotherm, XRD, SEM, and NH3-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
  1. Stoker M, Micro. Mesop. Mater, 29, 3 (1999)
  2. Seo G, Min BG, Korean Chem. Eng. Res., 44, 329 (2006)
  3. Lee YJ, Baek SC, Jun KW, Appl. Catal. A: Gen., 329, 130 (2007)
  4. Parlitz B, Schreier E, Zubowa HL, Eckelt R, Lieske E, Lischke G, Fricke R, J. Catal., 155(1), 1 (1995)
  5. Pluth JJ, Smith JV, J. Phys. Chem., 93, 6516 (1989)
  6. Tan J, Liu Z, Bao X, Liu X, Han X, He C, Zhai R, Microp. Mesop. Mater, 53, 97 (2002)
  7. Wu XC, Abraha MG, Anthony RG, Appl. Catal. A: Gen., 260(1), 63 (2004)
  8. Han B, Shin CH, Cox PA, Hong SB, J. Phys. Chem. B, 110(16), 8188 (2006)
  9. Chen D, Moljord K, Fuglerud T, Holmen A, Microp. Mesop. Mater., 29, 191 (1999)
  10. Wu XC, Anthony RG, Appl. Catal. A: Gen., 218(1-2), 241 (2001)
  11. Liu P, Ren J, Sun Y, Catal. Commun., 9, 1804 (2008)
  12. Kim JH, Niwa M, J. Res. Inst. Catal., 18, 45 (2003)
  13. Chon HJ, Seo G, Int. Catal., 4th ed., Hanrimwon Publishing Co., Seoul (2002)
  14. Liu G, Tian P, Zhang Y, Li J, Lei, Xu, Meng S, Liu Z, Microporous Mesoporous Mater., 114, 416 (2008)
  15. Kim MJ, Jeon JK, Park YK, Ko YS, Sohn JM, Korean Chem. Eng. Res., 45, 117 (2007)
  16. Baek SC, Lee YJ, Jun KW, Korean Chem. Eng. Res., 44(4), 345 (2006)