Dehydration of Glycerin to Acrolein Over Heteropolyacid Nano-Catalysts Supported on Silica-Alumina

作者：Kang Tae Hun; Choi Jung Ho; Choi Jun Seon; Song In Kyu^*

来源：Journal of Nanoscience and Nanotechnology, 2015, 15(10): 8324-8329.

DOI：10.1166/jnn.2015.11247

• Heteropolyacid
• Silica-Alumina
• Dehydration of Glycerin
• Acrolein
• Bronsted Acidity

A series of H3PW12O40 nano-catalysts supported on silica alumina (XH3PW12O40/SA (X= 10, 15, 20, 25, and 30)) with different H3PW12O40 content (X, wt%) were prepared, and they were applied to the dehydration of glycerin to acrolein. The effect of H3PW12O40 content on the physicochemical properties and catalytic activities of XH3PW12O40/SA nano-catalysts was investigated. Surface area and pore volume of XH3PW12O40/SA catalysts decreased with increasing H3PW12O40 content. Formation of H3PW12O40 aggregates was observed in the catalysts with high H3PW12O40 loading. Bronsted acidity of the catalysts showed a volcano-shaped trend with respect to H3PW12O40 content. It was revealed that yield for acrolein increased with increasing Bronsted acidity of H3PW12O40/SA catalysts. Bronsted acidity of XH3PW12O40/SA catalysts served as a crucial factor determining the catalytic performance in the dehydration of glycerin. Among the catalysts tested, 25H(3)PW(12)O(40)/SA catalyst with the largest Bronsted acidity showed the best catalytic performance.

• 出版日期2015-10