Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Microwave-assisted TS-1 Membrane for the Separation of Ethylbenzene from Xylene Mixture

마이크로웨이브로 제조된 TS-1 Membrane을 이용한 혼합 자일렌에서의 에틸벤젠 고순도화

  • Jeon, Yu-Kwon (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Lee, Gi-Cheon (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Chu, Young-Hwan (Department of New Energy.Resource Engineering, College of Science & Engineering, Sangji University) ;
  • Choi, Seong-Hwan (The 4th Research Team, Daedeok Research Institute, Honam Petrochemical Corp.) ;
  • Seo, Young-Jong (The 4th Research Team, Daedeok Research Institute, Honam Petrochemical Corp.) ;
  • Shul, Yong-Gun (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • Received : 2012.04.17
  • Accepted : 2012.04.26
  • Published : 2012.04.30
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Abstract

In this study, separation of ethylbenzene from mixed xylene was performed by using TS-1 zeolite membrane. TS-1 zeolite membranes were prepared by microwave synthesis and changing the reaction temperature. MFI-type TS-1 membranes are synthesized on alumina tubes by functional coating using 3-chloropropyltrimethoxysilane (3CP-TMS). On top surface of interlayer, nano TS-1 crystals were seeded. To form interlayer, microwave-assisted growth of TS-1 zeolite was carried out and thin zeolite layers were produced. All of the prepared membranes are tested to separate ethylbenzene from mixed xylene at different operating temperatures. TS-1 membrane with zeolite seed synthesized at $170^{\circ}C$ compared to 120, $140^{\circ}C$ shows the best ethylbenzene separation at the operation temperature of $200^{\circ}C$ from ternary mixed xylene containing certain composition of ethylbenzene/p-xylene/m-xylene. (separation factor : 2.64, ethylbenzene flux : 1703.0 mol/$m^2{\cdot}s{\cdot}Pa$).

본 연구에서는 혼합 자일렌에서 에틸벤젠을 분리하기 위하여 제올라이트 분리막을 이용하였다. 마이크로웨이브 합성 온도에 변화를 주어 제조한 TS-1 제올라이트 결정을 알루미나 튜브에 성장시키기 위해 3-chloropropyltrimethoxysilane를 코팅 후 TS-1 nano seed를 안착시키고 마이크로웨이브 합성법을 이용한 2차 성장을 통해 3~4 ${\mu}m$의 두께를 가지는 얇은 TS-1 제올라이트 분리막을 제조하였다. 제조한 분리막을 이용하여 에틸벤젠/메타자일렌/파라자일렌이 혼합된 혼합 자일렌으로부터 에틸벤젠을 분리하였다. 마이크로웨이브 합성 온도가 증가할수록 제올라이트 결정의 크기가 비례하여 증가하였다. 또한 반응기의 온도가 $200^{\circ}C$에서 가장 높은 투과 플럭스와 선택도를 가졌다. 가장 좋은 에틸벤젠 분리 성능을 보인 분리막은 마이크로웨이브 합성 온도가 $170^{\circ}C$인 분리막이고 선택도 값은 2.64였다(에틸벤젠 투과 플럭스 : 1703.0 mol/$m^2{\cdot}s{\cdot}Pa$).

Keywords

References

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