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Received July 14, 2004
Accepted August 20, 2004
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수열합성법으로 제조한 NaA 제올라이트 분리막을 이용한 TFEA/물 혼합물에서의 투과증발
Pervaporation of TFEA/Water Mixtures Through NaA Zeolite Membrane Hydrothermally Synthesized
충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220 1한국화학연구원 화학기술연구부, 305-600 대전시 유성구 장동 100
Department of Chemical Engineering, College of Engineering, Chungnam National University, 220, Gung-dong, Yuseong-gu, Daejeon 305-764, Korea 1Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology, 100, Jang-dong, Yuseong-gu, Daejeon 305-600, Korea
Korean Chemical Engineering Research, October 2004, 42(5), 564-569(6), NONE Epub 18 November 2004
Abstract
투과 증발은 막을 근거로 한 에너지 절약형 분리공정으로 전통적인 증류 분리공정과 비교하여 높은 선택도를 나타내기 때문에 액상 혼합물 분리의 대체 공정으로서 주목받고 있다. NaA 제올라이트 분리막을 다공성 α-알루미나 튜브의 내부 표면에 수열 합성하였으며, 합성된 NaA 제올라이트 분리막의 구조 및 균일 합성 여부를 확인하기 위하여 XRD 및 SEM 분석을 실시하였다. TFEA/물 혼합물의 투과 증발 실험 결과, 실험 농도 및 온도에 따라 NaA 제올라이트 분리막은 약 550-5,800 g/m2/hr의 총투과 플럭스와 4,800-660,000의 선택도를 나타내었다. 또한 NaA 제올라이트 분리막은 TFEA/물 이성분계의 분리에 있어 기존의 증류공정과 비교하여 매우 우수한 성능을 나타냄을 확인할 수 있었으며 따라서 이 분리막을 이용하여 투과 증발 공정을 설계할 수 있을 것으로 사료된다.
Pervaporation is mainly used to separate liquid mixtures because not only it exhibits a high selectivity compared with traditional distillation processes, but also it is known to be an energy saving separation process. The NaA zeolite membranes was prepared on the inner surface of a porous α-alumina tube using a hydrothermal synthesis. The NaA zeolite crystals and the surface morphology of the membrane were characterized by X-ray diffraction and scanning electron microscope. The total flux was about 550-5,800 g/m2/hr and the separation factor was in the range of 4,800-660,000. The separation performance through the NaA membrane was found to be superior to that with a distillation process by comparison of the vapor-liquid equilibrium data.
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