• 제목/요약/키워드: Facilitated transport membrane

검색결과 86건 처리시간 0.019초

The Structural Transitions of $\pi$-Complexes of Poly(styrene-b-butadiene-b-styrene) Block Copolymers with Silver Salts and Their Relation to Facilitated Olefin Transport

  • Lee, Dong-Hoon;Kim, Jong-Hak;Jongok Won;Kang, Yong-Soo
    • 한국막학회:학술대회논문집
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    • 한국막학회 2004년도 Proceedings of the second conference of aseanian membrane society
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    • pp.211-215
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    • 2004
  • Olefins are the most important feedstock in the petrochemical industry and thus the separation of olefin/paraffin mixtures is crucial to that industry. At present, this separation is mostly carried out using cryogenic distillation processes that require enormous capital investment and have high operational costs.(omitted)

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올레핀 촉진수송 나노복합체 분리막의 투과도 향상을 위한 iodine의 활용 (Utilization of Iodine for the Enhanced Permeance of Facilitated Olefin Transport Nanocomposite Membrane)

  • 최예지;이은용;강상욱
    • 멤브레인
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    • 제24권6호
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    • pp.448-452
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    • 2014
  • 올레핀/파라핀 분리 기술로 silver nanoparticles(AgNPs)를 운반체로 사용하여 보다 효과적으로 올레핀을 분리하는 고성능 올레핀 촉진수송 분리막을 제조하고자 하였다. 기존에 성능이 밝혀진 PVP/AgNPs/TCNQ 나노복합체 막에 추가적으로 할로겐 물질을 첨가하여 AgNPs의 표면을 더 양극화시킴으로써 성능을 향상시키고자 하였다. 제조한 용액을 TEM과 EDS로 분석해서 AgNPs의 형성과 iodine의 존재를 확인하였다. Propylene/propane 혼합기체의 분리 성능 실험을 통해 기존 PVP/AgNPs/TCNQ 나노복합체 분리막과 기체 분리 성능을 비교하였고, long-term stability 실험을 통해 분리막의 안정성을 조사하였다.

Changes in Facilitated Transport Behavior of Silver Polymer Electrolytes by UV Irradiation

  • Jongok Won;Yosang Yoon;Kang, Yong-Soo
    • Macromolecular Research
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    • 제10권2호
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    • pp.80-84
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    • 2002
  • Silver species other than the silver ion were formed by UV irradiation on polymer electrolyte membranes containing silver salts and their effect on complexation behavior between the silver and olefin was investigated through the separation performance of olefin/paraffin mixtures. The ideal propylene/propane separation factor reached 350 and the separation coefficient was ca.15 due to the high loading amount of silver ions into poly(2-ethyl-2-oxazoline) (POZ) without UV irradiation. On UV irradiation either in air or under nitrogen, the silver-POZ membranes became yellow-brown initially due to the formation of colloidal silver particles, and finally black and metal-like luster. Even when Ag$^{+}$ was converted, to some extent, to Ag$^{\circ}$ by UV irradiation in air at the early stage, the separation coefficient of olefin/paraffin mixtures was maintained. This suggests that silver species other than the silver ion is active for olefin carrier for facilitated transport. Meanwhile the steady decrease of the separation coefficient was observed in the silver/POZ membranes irradiated under $N_2$. It is suggested that the reduction of silver ions in POZ goes through a different photoreduction mechanism with UV irradiation depending on the environment.t.

Facilitated Transport of Cr(VI) through a Supported Liquid Membrane with a Carrier

  • Park, Sang-Wook;Lee, Jae-Wook;Kim, Sung-Soo;Choi, Byoung-Sik
    • 한국응용과학기술학회지
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    • 제20권2호
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    • pp.154-164
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    • 2003
  • This paper has applied a simple model to the mass transfer mechanism of Cr(VI) with crownether in a batch-type, supported liquid membrane module. Concentration at pH 3 are as follows : 0.012 kmol/$m^3{\le}$18-crown-6${\le}$0.036 kmol/$m^3$ and 20 g/$m^3{\le}$ Cr(VI)${\le}$500 g/$m^3$. The measured values of forward- and backward-reaction rate constants between Cr(VI) and 18-crown-6 were used to simulate the model with the mass conservation equation and associated boundary conditions. Comparison between the experimental and simulated facilitated factor of Cr(VI) transport led to classification of reaction regions.

은염을 포함하는 고분자 전해질 막을 통한 올레핀 촉진수송의 해석 (Analysis of Facilitated Olefin Transport Through Polymer Electrolyte Membranes Containing Silver Salts)

  • Yong Soo Kang;Dongkyun Ko;Jong Hak Kim;Sung Taik Chung
    • 멤브레인
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    • 제13권4호
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    • pp.239-245
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    • 2003
  • 본 연구에서는 은-고분자 전해질 막에서의 프로필렌/프로판에 대한 순수 기체 선택도 (${\approx}10,000$)와 혼합기체 선택도(${\approx}40$)의 큰 차이의 원인을 규명하였다. 먼저 기체 공급 조건이 혼합기체의 투과도와 분리 성능에 미치는 영향을 고찰하였다. 프로필렌의 농도가 감소함에 따라 고분자 전해질 막을 통한 프로필렌의 투과도는 감소하고, 프로판의 투과도는 증가를 하였으며, 그 결과 프로판/프로필렌의 선택도가 감소하였다. 이는 고분자 전해질막의 프로필렌에 의한 가소화에 의한 것임을 실험적 결과 및 수학적 모델에 의해서 확인하였다. 또한, 압력과 무관한 투과도를 사용하였을 때의 이론적 계산에 의한 막 분리 성능은 실험치와 비슷하게 나왔음을 알 수 있었다.

Poly(4-vinyl-benzo-15-crown-5-co-di(ethylene glycol) ethyl ether acrylate) Carrier-Facilitated Transport Membrane의 선택적 금속이온 투과성 (Selective transport of aqueous metal ions of carrier-faciliated transport membrane prepared from poly(4-vinyl-benzo-15-crown-5-co-Di(ethylene glycols ethyl ether acrylate))

  • Jin, Long-Yi;Soukil Mah;Hyang. Sun
    • 한국막학회:학술대회논문집
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    • 한국막학회 2002년도 춘계 총회 및 학술발표회
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    • pp.106-109
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    • 2002
  • No Abstract, See Full-text

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