Dehydration of Glycerol Over Niobia-Supported Silicotungstic Acid Catalysts

Authors
Lee, Young YiOk, Hye JeongMoon, Dong JuKim, Jong HoPark, Nam CookKim, Young Chul
Issue Date
2013-01
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.13, no.1, pp.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 similar to 50 wt%. The prepared catalysts were characterized by N-2 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.
Keywords
GAS-PHASE DEHYDRATION; SUSTAINABLE PRODUCTION; ACROLEIN; GAS-PHASE DEHYDRATION; SUSTAINABLE PRODUCTION; ACROLEIN; Niobium Oxide (Nb2O5); Silicotungstic Acid (H4SiW12O40); Glycerol; Acrolein; Dehydration
ISSN
1533-4880
URI
https://pubs.kist.re.kr/handle/201004/128491
DOI
10.1166/jnn.2013.6957
Appears in Collections:
KIST Article > 2013
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