Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis of Bimodally Porous γ-Alumina Granules by Sol-Gel/Oil-Drop Method

솔-젤/Oil-Drop법을 이용한 이중 다공성 γ-알루미나 그래뉼의 제조

  • Choi, Junseo (College of Environment and Applied Chemistry, Kyunghee University) ;
  • Kim, Jinsoo (College of Environment and Applied Chemistry, Kyunghee University) ;
  • Lee, Tai-Gye (Department of Chemical Engineering, Yonsei University)
  • 최준서 (경희대학교 환경.응용화학대학) ;
  • 김진수 (경희대학교 환경.응용화학대학) ;
  • 이태규 (연세대학교 화학공학과)
  • Received : 2007.01.10
  • Accepted : 2007.02.09
  • Published : 2007.04.10
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Abstract

Bimodally porous ${\gamma}$-alumina granules, including mesopores (2~50 nm) and macropores (>50 nm), were prepared by sol-gel and oil-drop method. Mesopores are made from the voids among the alumina crystallites, while macropores are from the space of the decomposed PS particles used as physical templates during the granulation process. The product ${\gamma}$-alumina granules with the average diameter of 2 mm were characterized by FE-SEM, XRD, FT-IR, $N_2$ porosimetry, and universal mechanical testing system.

메조기공(2~50 nm)과 매크로기공(>50 nm)의 이중 기공구조를 갖는 ${\gamma}$-알루미나 그래뉼을 솔-젤법과 oil-drop법을 이용하여 제조하였다. 메조기공은 알루미나 결정입자간의 공간에서 생성되며, 매크로기공은 합성시 구형의 polystyrene(PS) 입자를 물리적 템플레이트로 혼합한 후 열처리 과정을 거쳐 PS 입자를 연소시킴으로 생성되었다. 제조된 ${\gamma}$-알루미나 그래뉼은 평균 직경이 2 mm였으며, 화학적 물리적 특성은 FE-SEM, XRD, FT-IR, $N_2$ porosimetry, 만능시험기 등을 이용하여 살펴보았다.

Keywords

Acknowledgement

Supported by : 한국과학재단

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