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Supported silicotungstic acid on zirconia catalyst for gas phase dehydration of glycerol to acrolein

Paper ID Volume ID Publish Year Pages File Format Full-Text
53662 46978 2015 10 PDF Available
Title
Supported silicotungstic acid on zirconia catalyst for gas phase dehydration of glycerol to acrolein
Abstract

•A series of supported HSiW on ZrO2 were screened for acrolein production.•69.3% acrolein selectivity at 93% glycerol conversion obtained by 30HZ sample.•The 30HZ catalyst exhibited high stability even after 30 h.•The optimum amount of Keggin anion density was 3.2 HSiW nm−2.

The gas phase dehydration of glycerol to acrolein over a series of supported silicotungstic acid (HSiW) on zirconia (10HZ, 20HZ, 30HZ and 40HZ) has been investigated. The catalysts were characterized by temperature programmed desorption, nitrogen adsorption–desorption, thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, field-emission scanning electron microscopy and energy dispersive X-ray techniques. The large pore diameters (>19 nm) of the prepared catalysts alleviated the coke deposition effect. Also, the specific surface area and acidity of the samples surged from 18 to 22 m2/g and 0.38 to 1.24 mmol/g cat, respectively by varying HSiW loadings from 10 to 40 wt% on zirconia. The highest acrolein yield achieved was 63.75% at 92% glycerol conversion over 30HZ catalyst for 10 wt% glycerol feed concentration and 300 °C reaction temperature in 3 h. The combined physico-chemical characteristics of 30HZ made it more superior compared with other samples in the current study.

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Keywords
Glycerol; Acrolein; Dehydration; Supported silicotungstic acid; Zirconium dioxide; Keggin anion
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Supported silicotungstic acid on zirconia catalyst for gas phase dehydration of glycerol to acrolein
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 256, Part 2, 1 November 2015, Pages 315–324
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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