Property and Catalytic Activity of Heteropoly Acid Supported on MCM-41, 48 Mesoporous Material and SiO2

MCM-41, 48 메조포러스 물질 및 SiO2에 담지한 헤테로폴리산의 특성 및 촉매적 활성

  • 박정우 (한국화학연구소 화학공정연구센터) ;
  • 김범식 (한국화학연구소 화학공정연구센터) ;
  • 이정민 (한국화학연구소 화학공정연구센터) ;
  • 이관영 (고려대학교 화학공학과)
  • Received : 1999.07.13
  • Accepted : 1999.10.23
  • Published : 1999.11.10

Abstract

Heteropoly acid(HPW) catalysts supported on three different carriers, an amorphous silica, MCM-41 and MCM-48, with different loadings and calcination temperatures have been prepared and characterized by X-ray diffraction, nitrogen physorption, infrared spectroscopy, and $^{31}P$ magic angle spinning NMR. From the result of IR and NMR, it was shown that HPW retains the Keggin structure on the supported catalysts. No HPW crystal phase was developed even at HPW loadings as high as 35 wt % on the MCM-41 and 65 wt % MCM-48. Thus, HPW appeared to form finely dispersed species. In the hydrolysis reaction of di, bis, tri-pentaerythritol, HPW/MCM-41, 48 exhibited higher catalytic activity than $HPW/SiO_2$ or HPW.

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