Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Zeolite Membranes: Functionalizing of Properties by Tailored Compositions

제올라이트 분리막: 조성 변경을 통한 분리막 성질의 조절

  • Richter, Hannes (Fraunhofer Institute for Ceramic Technologies and Systems - Hermsdorf branch) ;
  • Weyd, Marcus (Fraunhofer Institute for Ceramic Technologies and Systems - Hermsdorf branch) ;
  • Simon, Adrian (Fraunhofer Institute for Ceramic Technologies and Systems - Hermsdorf branch) ;
  • Kuhnert, Jan-Thomas (Fraunhofer Institute for Ceramic Technologies and Systems - Hermsdorf branch) ;
  • Gunther, Christiane (Fraunhofer Institute for Ceramic Technologies and Systems - Hermsdorf branch) ;
  • Voigt, Ingolf (Fraunhofer Institute for Ceramic Technologies and Systems - Hermsdorf branch) ;
  • Michaelis, Alexander (Fraunhofer Institute for Ceramic Technologies and Systems - Hermsdorf branch)
  • Received : 2017.11.30
  • Accepted : 2017.12.13
  • Published : 2017.12.31
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Abstract

Membrane separation is a technology of low energy consumption. Membranes made of zeolites are of great interest because their fixed and open pores in the size of small molecules inside crystalline structures allow separation processes under harsh conditions. While zeolite NaA (LTA-type) is industrially used for dewatering of organic solvents, its pore size and thermal and hydrothermal stability can be tuned by exchange of framework and extra-framework elements. SOD with pores of only 0.28 nm is of great interest for $H_2$- und $H_2O$-separation and also can be tuned by ion exchange. Zeolites open the opportunity to create membranes of adapted separation behavior for small molecules in conditions of surrounding technical processes.

분리막을 이용한 분리 기술은 에너지 소요가 적다. 제올라이트를 기반으로 제작한 분리막의 경우, 결정 구조 내에 작은 분자 크기의 기공을 갖고 있어 이를 이용하여 가혹한 조건에서도 분리가 가능하기 때문에, 그 관심도가 높다. NaA (LTA 유형의 제올라이트) 제올라이트의 경우, 산업적으로 유기 용매에서 수분을 제거하는 데 많이 사용되는 데, 해당 기공 크기나 열적/수열안정성은 제올라이트 내부나 외부의 원소를 바꿔줌으로써 조절할 수 있다. 더 작은 0.28 nm 크기를 지닌 SOD 유형의 제올라이트의 경우, 수소나 물 분리에 적합하여 그 관심도가 높아지고 있으며, 이 제올라이트 유형 또한, 이온교환과 같은 방법으로 성질을 변경할 수 있다. 제올라이트는 주변 기술 및 공정 조건에 맞게 작은 분자들을 적절하게 분리할 수 있는 분리막을 창출할 수 있다는 장점을 지닌 소재이다.

Keywords

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