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제  목 :  Understanding of alumina surface properties and catalyst preparation

           

연  사 : 곽자훈 교수님(School of Energy and Chemical Engineering, UNIST)

           

일  시 : 2018년 5월 31일(목) 오후 4시 30분

장  소 : 화학관 2층 세미나실(330226호실)

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Understanding of alumina surface properties

and catalyst preparation

 

Ja Hun Kwak

School of Energy and Chemical Engineering, UNIST

(jhkwak@unist.ac.kr)

Alumina is one of the most important heterogeneous catalyst materials, and is mainly used as a support for catalytically active phases (metal and oxide) owing to its  surface properties, such as high surface area and thermal stability. Al₂O₃-based catalysts have wide applications, ranging from petroleum chemistry to automobile emission control. In addition, alumina itself is a well-known acidic catalyst for alcohol dehydration reactions.

In this presentation, I would like to show the recent results that the surface properties of alumina characterized using ethanol TPD and ethanol dehydration reactions. Based on these results, I suggest that the ethanol interaction as a general descriptor of alumina surfaces. And I also utilize these quantitative understanding of alumina surface properties for understanding how does the catalytic materials interact with alumina surfaces. These results will provide important guidelines for the synthesis and characterization of commercially important alumina-supported catalysts.

Keywords: alumina surface, acid-base property, alcohol dehydration, ethanol-TPD, Pt on alumina