Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
권호 표지

Pervaporation Characteristics of NaA Type Zeolite Membrane Substituted to $K^+$

칼륨 이온으로 치환된 NaA형 제올라이트 분리막의 투과증발 특성

  • Lee, Yong-Taek (Department of Chemical Engineering, College of Engineering, Chungnam National University) ;
  • Yun, Mi-Hye (Department of Chemical Engineering, College of Engineering, Chungnam National University) ;
  • Jeong, Heon-Kyu (Department of Chemical Engineering, College of Engineering, Chungnam National University) ;
  • Jeong, Dong-Jae (Department of Chemical Engineering, College of Engineering, Chungnam National University) ;
  • Ahn, Hyo-Seong (Department of Chemical Engineering, College of Engineering, Chungnam National University)
  • Published : 2008.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Zeolite A have been known to be chemically, mechanically and thermally quite stable. The ion-exchanged membranes were tested for the removal of water from ethanol/water mixtures by pervaporation. Since it is quite difficult to prepare the potassium form of zeolite A by a direct synthesis, it was obtained by the ion-exchange method from NaA zeolite. The effects of concentration of ethanol at the feed side and the temperature were studied on the permeation flux and the separation factor of water. After $Na^+$ ion was exchanged to $K^+$ ion, it was found that the total flux decreased and the separation factor increased.

열적, 기계적, 화학적 안정성이 우수한 제올라이트 분리막의 물/에탄올 선택도를 이온교환 실험을 통해 더욱 효과적으로 높이고자 하였다. KA형 제올라이트 분리막을 직접 합성하는 것은 용이하지 않으므로 NaA형 제올라이트 분리막을 합성한 후 이를 다시 이온교환 하여 KA형 제올라이트 분리막을 제조하였다. 공급되는 에탄올의 농도 변화 및 투과 증발실험 온도의 변화가 투과플럭스와 물 선택도에 미치는 영향을 고찰하였다. 이온교환 실험 후 전체 투과플럭스는 감소하였고 물 선택도는 증가함을 관찰할 수 있었다.

Keywords

References

  1. C. C. Pereira, C. A. Habert, R. Nobrega, and C. P. Borges, 'New insights in the removal of diluted volatile organic compounds from dilute aqueous solution by pervaporation process', J. Membr. Sci., 138, 227-235 (1998) https://doi.org/10.1016/S0376-7388(97)00225-1
  2. 이영무, '고분자막을 통한 유기액체 혼합물의 투과 증발 분리', 폴리머, 13(1), 3-13 (1989)
  3. H. P. Hsieh, R. R. Bhave, and H. L. Fleming, 'Microporous alumina membranes', J. Membr. Sci., 39(3), 221-241 (1988) https://doi.org/10.1016/S0376-7388(00)80931-X
  4. 남상용, '석유화학공업에서의 투과증발막의 응용', 멤브레인, 17(1), 1-13 (2007)
  5. 이용택, 박중원, 신동호, '투과증발법을 이용한 Magnolia Aroma 모델액의 농축 및 PVDF/PDMS 복합막의 제조' 멤브레인, 17(1), 14-22 (2007)
  6. T. Sano, M. Hasegawa, Y. Kawakami, Y. Kiyozumi, H. Yanagishita, D. Kitamoto, and F. Mizukami, 'Potentials of silicate membranes for the separation Alcohol/water mixtures', Stud. Surf.Sci. Catal., 84, 1175-1182 (1994) https://doi.org/10.1016/S0167-2991(08)63655-1
  7. Q. Liu, R. D. Noble, John. L. Falconer, and H. H. Funke, 'Organics/water separation by pervaporation with a zeolite membrane', J. Membr. Sci., 117, 163-174 (1996) https://doi.org/10.1016/0376-7388(96)00058-0
  8. D. W. Breck, 'Zeolite molecular sieves', John wiley & Sons, New York (1974)
  9. R. C. Reid, J. M. Prausnitz, and B. E. Poling, 'The Properties of Gases and Liquids', McGrowhill, New York (1986)
  10. J. J. Jafar and P. M. Budd, 'Separation of alcohol/ water mixtures by pervaporation through zeolite A membranes', Microporous Materials, 12, 305-311 (1997) https://doi.org/10.1016/S0927-6513(97)00080-1
  11. Y. Hasegawa, K. Watanabe, K. Kusakabe, and S. Morooka, 'The separation of $CO_2$ using Y-type zeolite membranes ion-exchanged with alkali metal cations', Separation and Purification Technology, 22-23, 319-325 (2001) https://doi.org/10.1016/S1383-5866(00)00154-4
  12. Y. Hasegawa, K. Watanabe, K. Kusakabe, and S. Morooka, 'Influence of alkali cations on permeation properties of Y-type zeolite membranes', J. Membr. Sci., 208, 415-418 (2002) https://doi.org/10.1016/S0376-7388(01)00694-9