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Dehydration of 1,5-pentanediol over rare earth oxides

Paper ID Volume ID Publish Year Pages File Format Full-Text
41024 45875 2012 8 PDF Available
Title
Dehydration of 1,5-pentanediol over rare earth oxides
Abstract

Vapor-phase catalytic dehydration of 1,5-pentanediol was investigated over rare earth oxides (REOs) at 325–450 °C. The conversion of 1,5-pentanediol over REOs calcined at 700 and 800 °C was higher than that calcined at 500 °C. Sc2O3, Yb2O3, and Lu2O3 with cubic bixbyite structure showed the selectivity to 4-penten-1-ol with higher than 74 mol%, while REOs with hexagonal and monoclinic structures showed the selectivity with less than 50 mol%. Especially, Yb2O3 and Lu2O3 calcined at 1000 °C showed high formation rate of 4-penten-1-ol per specific surface area over 1 mmol h−1 m−2 at 400 °C. In the Yb2O3 catalyst calcined at 800 °C, the conversion of 1,5-pentanediol was increased up to 74.4 mol% with increasing contact time, together with stable selectivity to 4-penten-1-ol of 71.8 mol%. In comparing the reactivity of alkanediols to form the corresponding unsaturated alcohols over Yb2O3, we found the reactivity of alkanediols into the corresponding unsaturated alcohols was the following order: 1,4-butanediol > 1,3-diols ≫ 1,5-pentanediol ≫ 1,6-hexanediol.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (239 K)Download as PowerPoint slideHighlight► The dehydration of 1,5-pentanediol to 4-penten-1-ol over rare earth oxides was studied. ► Sc2O3, Yb2O3, and Lu2O3 showed the selectivity to 4-penten-1-ol with higher than 74 mol%. ► Reactivity of alkanediols over Yb2O3 varies with the carbon number of diols. ► The reactivity order: 1,4-butanediol 1,3-diols ≫ 1,5-pentanediol ≫ 1,6-hexanediol.

Keywords
Dehydration; 1,5-Pentanediol; 4-Penten-1-ol; Rare earth oxides; Bixbyite; Reactivity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 419–420, 29 March 2012, Pages 41–48
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
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Full-text PDF Download
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