연구논문 - 에너지 , 환경분과 : 비젖음성 중공사막 접촉기에 의한 이산화탄소 분리에 관한 연구

염봉열,박유인,이용택,이규호 ( Bong Yeol Yeom,You In Park,Yong Taek Lee,Kew Ho Lee ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1994 No.1

Gas Barrier성 SEBS (Styrene Ethylene Butadiene Styrene Copolymer)-Clay 하이브리드 막의 제조 및 물성

남상용,염봉열,민병렬,김영진,Nam Sang Yong,Yeom Bong Yeol,Min Byoung Ryul,Kim Young Jin 한국막학회 2005 멤브레인 Vol.15 No.1

본 연구에서는 SEBS와 여러 가지의 유기화물로 처리된 MMT (montmorillonite) type의 clay를 이용하여 SEBS-clay 하이브리드 막을 용융삽입법으로 제조하였다. clay의 함량은 5 phr (per hundred resin)로 고정하였다. internal mixer를 사용하여 clay를 SEBS에 분산시켰으며, 제조된 SEBS-clay 하이브리드에서 clay의 특성피크가 완전히 박리되거나 이동하는 XRD 결과로부터 clay의 층간거리가 넓어지는 고분자의 clay 층간삽입을 확인하였다. Clay의 종류에 따라서 제조된 SEBS-clay 하이브리드 막의 가스투과도, 기계적 물성 및 열적 성질을 측정하였다. SEBS-clay 하이브리드 막은 clay 자체의 도입과 층간거리의 확대로 기체분자의 tortuosity를 증가시켜서 가스투과도를 저하시키는 것을 확인하였다. SEBS-clay hybrid membranes were prepared by melt intercalation method with internal mixer. In the hybrid, the amount of clay content was fixed to 5 phr. MMT was intercalated or exfoliated by the ionomer and it was confirmed by X-ray diffraction method. D-spacing of the characteristic peak from MMT plate in SAXD was moved and diminished. Gas permeability, mechanical properties and thermal properties of the SEBS-clay hybrid membranes were investigated. Gas permeability through the SEBS-clay hybrid membranes decreased due to increased tortuosity made by intercalation of clay in SEBS.

하이퍼브랜치 Poly(styrene-co-DVB) 설폰화 양이온교환 수지의 합성 및 특성

백기완(Ki Wan Baek),염봉열(Bong Yeol Yeom),황택성(Taek Sung Hwang) 한국고분자학회 2008 폴리머 Vol.32 No.1

고분자 기체 분리막 기술 동향

김종표(Jong Pyo Kim),염봉열(Bong Yeol Yeom),민병렬(Byung Ryul Min) 한국고분자학회 2005 고분자 과학과 기술 Vol.16 No.4

액막을 통한 이산화탄소의 촉진수송

염봉열,이용택 忠南大學校 産業技術硏究所 1996 산업기술연구논문집 Vol.11 No.1

A computer program was developed that could predict the permeation rates of CO₂across the liquid membrane using potassium carbonate as a transport carrier. This program was coded with the FORTRAN language to be used for an IBM compatible personal computer. The permeation rates of CO₂were predicted with various operating parameters such as a thickness of liquid membrane, a partial pressure of CO₂, a concentration of transport carrier, and a system temperature. Since the previous studies on the facilitation transport of CO₂have been performed at the room temperature using the constant carrier concentration, their results could not be utilized in a broad operating condition. As the temperature increases 50℃ higher than the room temperature of 25℃, the typical facilitation factor increases with a factor of minimum 5, depending on the membrane thickness with the other typical conditions. It should be noted that the facilitation factor increases significantly as the membrane thickness increases at higher temperature while the facilitation factor increases slowly at lower temperature. It was found that the higher the concentration of the carrier is, the larger the permeation rate of CO₂is. However, the facilitation factors of CO₂at lower concentration of K₂CO₃are predicted to be higher with a sufficiently thin membrane where they are controlled by the diffusivities of ions rather than by the chemical reaction and the solubility of CO₂plays a major role.

중공사막 접촉기를 통한 탄산칼륨 수용액으로의 이산화탄소 흡수거동 연구

이규호,염봉열,박유인,김민수,이용택 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.5

병류흐름 구조를 갖는 수소성의 다공성 중공사막 접촉기에서 이산화탄소 흡수에 대한 다양한 시스템 변수들의 영향을 고찰하였다. 흡수제로는 이산화탄소와 반응성이 있는 탄산칼륨 수용액을 사용하였으며, 반응에 의한 영향을 비교 고찰하기 위하여 순수물을 이용한 실험을 병행하였다. 기체는 이산화탄소와 질소의 혼합기체를 사용하였으며, 중공사막의 기공상태는 혼합기체와 흡수제의 적절한 압력조절을 통하여 비젖음성 조건으로 유지하였다. 탄산칼륨 수용액을 흡수제로 사용 했을 경우, 순수물에 비하여 실험변수들에 따라서 약 4-6배 정도 더 큰 이산화탄소의 투과속도를 얻을 수 있었으며, 흡수제내의 탄산칼륨의 농도가 증가할수록, 그리고 혼합기체의 압력과 유속이 증가할수록 흡수속도가 증가함을 알 수 있었다. The effects of various system parameters on the absorption of carbon dioxide into the absorbent liquid were investigated in a hydrophobic microporous hollow fiber membrane contactor with a configuration of countercurrent. An aqueous potassium carbonate solution was used as an absorbent and its permeation results were compared to those obtained with pure water to figure out the effect af chemical reaction. The mixture of carbon dioxide and nitrogen wav used ar an inlet gas and the pore condition of the hollow fiber membrane was hold to be nonwetted through an appropriate control of pressures of a mixture gas and an absorbent. In case of an aqueous potassium carbonate solution used as am absorbent, the permeation rate of carbon dioxide was about 4-6 times higher than that in pure water. The permeation rate was increased with the increments of the concentration of potassium carbonate in an absorbent, the pressure and the flow rate of a mixture gas.

탄산칼륨 수용액 액막을 통한 이산화탄소의 촉진수송에 미치는 온도와 수송담체 농도의 영향

이규호,염봉열,박유인,이용택,이용희 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.5

액막내에서 이산화탄소의 투과 거동을 예측하기 위하여 액막으로서 탄산칼륨 수용액을 선정하여 액막내의 아산화탄th와 관련된 가역반응을 고려한 시스템 지배방정식의 모델해석을 수행하였다. 모델해석에 사용된 반응속도상수, 평형상수, 용해도 그리고 확산계수를 탄산이온의 농도와 온도의 함수로 나타내었으며, 문헌값을 통하여 특정조건에서의 예측값을 확인하였다. 액막에서 이산화탄소의 투과에 영향을 미치는 중요한 인자들인 액막의 두께, 이산화탄소의 부분압력, 수송담체의 농도, 그리고 시스템의 온도를 실행 변수로 하여 이산화탄소의 투과속도를 예측할 수 있었다. 각각의 경우에 대하여 반응에 의한 이산화탄소의 투과속도 증가를 전체 이산화탄소의 투과속도와 촉진인자로 표현할 수 있었으며, 탄산칼륨 수용액내에서의 반응에 의하여 이산화탄소의 투과속도가 상당히 증가함을 알 수 있었다. 또한 온도가 증가함에 따라 전반적으로 투과속도와 함께 촉진인자가 증가함을 알 수 있었으며, 본 연구를 통해 액막에서의 이산화탄소 투과에 대한 수송담체의 농도와 온도를 포함한 효율적인 운전조건들을 제시할 수 있었다. Model analysis was carried out using the system controlling equations which include the reversible reactions of carbon dioxide with potasaium carbonate to predict the permeation behavior of carbon dioxide in a potassium carbonate liquid membrane. The physicochemical properties of reaction rate constants, equilibrium constants, solubility and diffusion coefficient were represented as a function of the concentration of carbonate ion and the temperature; the calculated solubility and the predicted diffusion coefficient were found to be identical to those published data. The permeation rates could be successfully predicted with several important parameters : the thickness of liquid membrane, the partial pressure of carbon dioxide, the concentration of carrier and the temperature. The increment of the permeation rate was represented in terms of the facilitation factor as a function of carrier concentration, It was found that the permeation rate of carbon dioxide increases significantly as the concentration of carrier increases. The facilitation factor considerably increases together with the permeation rate as the temperature increases. The effective operating conditions could be obtained through this model analysis for the permeation rate as well as the facilitation factor of carbon dioxide across the liquid membrane.

투과증발을 이용한 VOC 의 제거에 관한 연구

김희진,민병렬,염봉열,나성순 한국공업화학회 1999 응용화학 Vol.3 No.2

The recovery of trace volatile organic components from water by pervaporation was investigated. Permeation experiments through homogeneous polydimethylsiloxane (PDMS) membrane was carried out and the effect of feed concentrations and membrane thicknesses on the permeation characteristics were investigated. A solution-diffusion model is used to describe the pervaporation transport mechanism. In homogeneous PDMS membrane it appeared that the selectivities of MEK and toluene are constant, and that organic flux has a linear relationship with feed concentration. These results indicate that the coupling effects between organics were negligible. The selectivity of PDMS membranes is invariant with respect to the membrane thickness. The intrinsic membrane permeability of organic components determined by using a solution-diffusion model. Comparing with various composite type membrane, the membrane using PEG treated nonwoven fabric as sublayer showed the best performance in VOC recovery by pervaporation.