Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Study on Characteristics and Preparation of Binderless ZSM-5 Granules for Adsorption of Xylene Isomers

Binderless ZSM-5 성형체의 합성 및 자일렌 이성체의 흡착 특성에 관한 연구

  • Yun, Hyo-Sang (Environment & Resource Center, Korea Research Institute of Chemical Technology) ;
  • Hong, Ji-Sook (Environment & Resource Center, Korea Research Institute of Chemical Technology) ;
  • Suh, Jeong-Kwon (Environment & Resource Center, Korea Research Institute of Chemical Technology) ;
  • Shin, Chae-Ho (Department of Chemical Engineering, Chungbuk National University)
  • 윤효상 (한국화학연구원 환경자원연구센터) ;
  • 홍지숙 (한국화학연구원 환경자원연구센터) ;
  • 서정권 (한국화학연구원 환경자원연구센터) ;
  • 신채호 (충북대학교 화학공학과)
  • Received : 2010.03.31
  • Accepted : 2010.05.19
  • Published : 2010.08.10
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Abstract

In this study, an effective method to prepare granular binderless ZSM-5 which is as efficient p-xylene separatory adsorbent was explored. Colloidal silica sol 30 wt% solution as an inorganic binder and microcrystalline cellulose as an organic additive were added to ZSM-5 powder ($SiO_2/Al_2O_3$ = 50). Adsorbent with enough strength (0.721 kgf), high crystallinity (94.6%) and high BET specific surface area ($379.2m^2$/g) was obtained by calcination, binderless treatment, ${NH_4}^+$ ion exchange, and activation after spherical granulation process. A batch type adsorption experiment was proceeded with solutions comprising 3 xylene isomers by 1 : 1 : 1 weight ratio to evaluate adsorption characteristics of prepared absorbent. As a result, the obtained binderless ZSM-5 granule showed a higher selective adsorption performance for para-xylene than that of commercial adsorbent.

파라자일렌(p-xylene) 분리용 흡착제로서 효과적인 그래뉼 형태의 바인더리스 ZSM-5 성형체를 제조하는 방법을 검토하였다. $SiO_2/Al_2O_3$ = 50인 ZSM-5 결정분말에 무기 바인더인 colloidal silica sol 30 wt% 용액과 유기첨가물인 microcrystalline cellulose를 첨가하여 구형화한 후, 소성, 바인더리스 처리, ${NH_4}^+$ 이온교환, 활성화 등의 과정을 거쳐 충분한 강도(0.721 kgf) 및 높은 결정화도(94.6%)와 넓은 BET 비표면적($379.2m^2$/g)을 갖는 흡착제를 제조하였다. 제조된 성형체의 흡착특성을 평가하기 위해 자일렌 3가지 이성질체를 1 : 1 : 1의 무게비로 혼합하여 $100^{\circ}C$에서 회분식 흡착실험을 수행한 결과 제조된 바인더리스 ZSM-5 성형체는 상용흡착제보다 파라자일렌에 대해 높은 선택적 흡착성능을 나타냈다.

Keywords

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