Dehydration of Glycerol Over Niobia-Supported Silicotungstic Acid Catalysts

Title
Dehydration of Glycerol Over Niobia-Supported Silicotungstic Acid Catalysts
Authors
이영이옥혜정문동주김종호박남국김영철
Keywords
Niobium Oxide (Nb2O5); Silicotungstic Acid (H4SiW12O40); Glycerol; Acrolein; Dehydration
Issue Date
2013-01
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 13, NO 1, 339-343
Abstract
Liquid-phase dehydration of glycerol to acrolein over nanosized niobia-supported silicotungstic acid catalysts was performed to investigate the effect of the silicotungstic acid loading on the catalytic performance of the catalysts. The catalysts were prepared by following an impregnation method with different HSiW loadings in the range of 10~50 wt%. The prepared catalysts were characterized by N2 physisorption, XRD, FT-IR, TPD of ammonia, and TGA. Dehydration of glycerol was conducted in an autoclave reactor under the conditions of controlled reaction temperatures under corresponding pressure. Increasing HSiW loading rapidly increased the acidity of HSiW/Nb2O5 catalyst and rate of glycerol conversion, but acrolein selectivity decreased due to enhanced deactivation of the catalyst by carbon deposit. Consequently, it was confirmed that catalytic activity for the dehydration of glycerol to acrolein was dependant on the acidity of catalyst and can be controlled by HSiW loading.
URI
http://pubs.kist.re.kr/handle/201004/44945
ISSN
15334880
Appears in Collections:
KIST Publication > Article
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