Dehydration of Glycerol Over Niobia-Supported Silicotungstic Acid Catalysts
- Dehydration of Glycerol Over Niobia-Supported Silicotungstic Acid Catalysts
- 이영이; 옥혜정; 문동주; 김종호; 박남국; 김영철
- Niobium Oxide (Nb2O5); Silicotungstic Acid (H4SiW12O40); Glycerol; Acrolein; Dehydration
- Issue Date
- Journal of nanoscience and nanotechnology
- VOL 13, NO 1, 339-343
- 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.
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