Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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In-situ Growth Synthesis of ZIF-8 Membranes and their H2/CO2 Separation Properties

In-situ 성장법에 의한 ZIF-8 분리막 합성 및 H2/CO2 분리 특성

  • Lee, Jeong Hee (KHU-KIST Department of Converging Science and Technology, Kyung Hee University) ;
  • Yoo, Sung Jong (Fuel Cell Research Center, KIST) ;
  • Kim, Jinsoo (KHU-KIST Department of Converging Science and Technology, Kyung Hee University)
  • 이정희 (경희대학교 KHU-KIST 융합과학기술학과) ;
  • 유성종 (KIST 연료전지센터) ;
  • 김진수 (경희대학교 KHU-KIST 융합과학기술학과)
  • Received : 2018.04.25
  • Accepted : 2018.04.28
  • Published : 2018.04.30
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Abstract

ZIFs (Zeolitic imdazolate frameworks) have attracted great attention as membrane materials in recent years due to their high chemical and thermal stability, high specific surface area and adjustable pore structure. In this study, ZIF-8 membranes were synthesized by in-situ growth method on two different support materials (${\alpha}$-alumina and YSZ) and their $H_2/CO_2$ gas permeation characteristics were investigated. In order to synthesize defect-free ZIF-8 layer, YSZ support required less synthesis time than ${\alpha}$-alumina support due to smaller pore size. After in-situ growth for 3 h, ZIF-8 membranes prepared on both YSZ and ${\alpha}$-alumina supports showed $H_2/CO_2$ selectivity of about 10.

ZIFs (Zeolitic imdazolate frameworks)은 높은 화학적 열적 안정성, 높은 비표면적과 조절 가능한 기공구조로 최근 분리막 소재로 큰 관심을 받고 있다. 본 연구에서는 두 가지 종류의 다공성 지지체(${\alpha}$-alumina 및 YSZ)를 사용하여 in situ 성장법으로 ZIF-8 분리막을 합성하고, $H_2/CO_2$ 기체 투과 특성을 조사하였다. 결함 없는 ZIF-8층을 합성하는데 있어, 기공이 작은 YSZ 지지체는 ${\alpha}$-alumina 지지체 보다 더 적은 시간이 요구되었다. 합성시간이 3 h인 경우, ${\alpha}$-alumina 및 YSZ 지지체위에 형성된 ZIF-8 분리막은 약 10 정도의 $H_2/CO_2$ 선택도를 보였다.

Keywords

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