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ZSM-5 촉매의 제조와 특성분석

Synthesis and Characterization of ZSM-5 Zeolite Catalyst

HWAHAK KONGHAK, August 1987, 25(4), 427-434(8), NONE
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Abstract

TPAN-Na2O-SiO2-Al2O3-H2O 반응계를 이용하여 여러 가지 ZSM-5 제올라이트 촉매를 제조하고, ZSM-5 결정의 생성과 성장에 영향을 주는 반응혼합물의 조성과 pH, 반응온도 및 반응시간에 대하여 연구하였다. 생성된 ZSM-5 촉매의 물리, 화학적 특성을 XRD, SEM, , TPD, IR, TG, DTA 및 DTG를 사용하여 분석하고 메탄올 전환반응실험을 실시하여 ZSM-5 촉매의 반응성을 조사하였다. 실험결과에 의하면 ZSM-5 촉매는 SiO2/Al2O3의 비가 20 이상으로 되고, pH가 9-10.5의 범위로 유지될 때, 150 ℃ 전후의 반응온도에서 잘 생성되었다. 이와 같은 방법으로 제조된 촉매는 메탄올 전환반응에 대하여 우수한 활성을 나타내었다.
Various ZSM-5 zeolite catalysts were prepared by using the reaction mixture TPAH-Na2O-SiO2-Al2O3-H2O. The composition and pH of the reaction mixture, the reaction temperature, and the reaction time were found to be important factors for the formation and growth of ZSM-5 crystal. The physical and chemical characteristics of the ZSM-5 catalysts were examined by employing the XRD, SEM, XPS, TPD, IR, and TG-DTA-DTG methods, and their activities were tested by conducting the methanol conversion experiment. The ZSM-5 catalyst was obtained favorably when the SiO2/Al2O3 ratio was greater than 20, the pH in the range from 9 to 10.5 and the reaction temperature about 150 ℃. The catalyst so prepared proved to be very active for the conversion of methanol.

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