Characterization and Preparation of Al-Pillared Clay

Aluminium-Pillared Clay의 제조 및 특성

  • Park, Se-Jun (School of Chemical Engineering, Hanyang University) ;
  • Ha, Baik-Hyon (School of Chemical Engineering, Hanyang University) ;
  • Jeong, Soon-Yong (Chemical and Process Engineering Research Center, Korea Research Institute of Chemical Technology) ;
  • Suh, Jeong-Kwon (Chemical and Process Engineering Research Center, Korea Research Institute of Chemical Technology) ;
  • Lee, Jung-Min (Chemical and Process Engineering Research Center, Korea Research Institute of Chemical Technology)
  • 박세준 (한양대학교 공과대학 응용화학공학부) ;
  • 하백현 (한양대학교 공과대학 응용화학공학부) ;
  • 정순용 (한국화학연구소 화학공정연구센터) ;
  • 서정권 (한국화학연구소 화학공정연구센터) ;
  • 이정민 (한국화학연구소 화학공정연구센터)
  • Received : 1998.10.14
  • Accepted : 1998.12.08
  • Published : 1999.04.10

Abstract

Aluminum-pillared clay was prepared by the intercalation of Al-hydroxy oligomer into domestic bentonite. The solid products are characterized by XRD, nitrogen adsorption/desorption, EDX, and SEM. The solid products show relatively high specific surface areas in the range of $104{\sim}228m^2/g$, and their specific surface area, micropore surface area, and micropore volume increase with increasing the mole ratio of OH/Al. From the results of pore size distribution calculated by BJH equation, it was found that aluminum-pillared clay also contains much mesopore near $40{\AA}$. These results indicate that Al-hydroxy oligomer was intercalated into bentonite, and aluminum oxide was pillared among the layers of bentonite, and micropore and mesopore was finally developed into layers. As OH/Al mole ratio increases, the thermal stability of aluminum-pillared clay increases. This result can be explained by the fact that the density of layers is increased due to the formation of aluminum pillars.

Keywords

Pillaring;Al-hydroxy Oligomer;Bentonite;Intercalation

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