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Conversion of glycerol into allyl alcohol over potassium-supported zirconia–iron oxide catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
45207 46405 2014 7 PDF Available
Title
Conversion of glycerol into allyl alcohol over potassium-supported zirconia–iron oxide catalyst
Abstract

•Catalytic conversion of glycerol was performed with iron oxide-based catalysts.•Useful chemicals including allyl alcohol were produced from glycerol.•Alkali metal-supported ZrO2–FeOX was effective in increasing allyl alcohol yield.•K/Al2O3–ZrO2–FeOX showed higher structure stability and high allyl alcohol yield.•K/Al2O3–ZrO2–FeOX was also applicable to the conversion of crude glycerol.

The catalytic conversion of glycerol was performed with iron oxide-based catalysts for production of allyl alcohol using a fixed-bed flow reactor at 623 K under atmospheric pressure. The glycerol dehydration proceeds on acid sites of catalysts while the allyl alcohol production is assumed to be catalyzed by non-acidic sites of catalysts through a hydrogen transfer mechanism. Different alkali metals, including Na, K, Rb, and Cs were supported on ZrO2–FeOX and all of them gave impressively higher allyl alcohol yield and suppressed glycerol dehydration due to the reduced catalyst acidic property. K-supported ZrO2–FeOX (K/ZrO2–FeOX) was chosen for further studies, and allyl alcohol yield remarkably increased up to 27 mol% C at the K content of 3–5 mol%. Since no external hydrogen gas is supplied to the system, the hydrogen transfer mechanism should take place between the reaction of glycerol and either hydrogen atoms derived from formic acid forming during the reaction, or active hydrogen species produced from the decomposition of H2O by ZrO2.Addition of Al2O3 to K/ZrO2–FeOX (K/Al2O3–ZrO2–FeOX) was examined in order to improve structure stability during the glycerol conversion. Al2O3 addition to the catalyst was effective to achieve higher structure stability, leading to high glycerol conversion with stable allyl alcohol yield of above 25 mol% C. Moreover, K/Al2O3–ZrO2–FeOX can be applicable to the conversion of crude glycerol which is the waste solution obtained from biodiesel production.

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Keywords
Biomass utilization; Glycerol conversion; Crude glycerol; Iron oxide catalyst; Allyl alcohol
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Conversion of glycerol into allyl alcohol over potassium-supported zirconia–iron oxide catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 146, March 2014, Pages 267–273
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
Any Questions? feel free to contact us