Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Acidic Properties of Mg-Al Mixed Oxides in the Dehydration of iso-Propanol

이소프로판올의 탈수반응에 있어서 Mg-Al 혼합 산화물의 산점 특성

  • Youn, Hyunki (Industry-University Incorporation Foundation) ;
  • Ahn, Ji-Hye (Department of Chemical Engineering, Chungbuk National University) ;
  • Park, Jung-Hyun (Department of Chemical Engineering, Chungbuk National University) ;
  • Shin, Chae-Ho (Department of Chemical Engineering, Chungbuk National University)
  • Received : 2014.08.08
  • Accepted : 2014.09.25
  • Published : 2014.09.30
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Abstract

Mg-Al mixed oxides with molar ratio of Mg/Al = 1-3 were prepared by co-precipitation and characterized by using X-ray diffraction, scanning electron microscopy, BET surface area and pore volume measured by $N_2$ sorption analysis, and temperature programmed desorption of iso-propanol. As Al content in Mg-Al mixed oxide increased, the acidity and BET surface area proportionally increased. This increase of acidity directly influenced the catalytic activity of iso-propanol conversion and selectivity to propylene.

Mg/Al 몰비를 1에서 3 범위에서 변화시켜 Mg-Al 혼합산화물을 공침법으로 제조하였다. 제조된 Mg-Al 혼합산화물은 X-선회절분석, 주사전자현미경분석, 질소흡착에 의한 비표면적 및 기공부피 측정, 이소프로판올의 승온탈착모델 반응으로 제조된 산화물의 특성분석을 수행하였다. 소성된 Mg-Al 혼합산화물은 이소프로판올의 탈수소/탈수반응에 적용하여 산염기 특성을 비교하였다. Mg-Al 혼합산화물에서 Al 함량이 증가함에 따라 비표면적 및 산점세기가 비례적으로 증가하였다. 이러한 산점세기 변화는 이소프로판올의 전환율 및 프로필렌 선택도에 직접적인 영향을 미쳤다.

Keywords

References

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