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Stability and regeneration of Cu–ZrO2 catalysts used in glycerol hydrogenolysis to 1,2-propanediol

Paper ID Volume ID Publish Year Pages File Format Full-Text
54957 47033 2013 8 PDF Available
Title
Stability and regeneration of Cu–ZrO2 catalysts used in glycerol hydrogenolysis to 1,2-propanediol
Abstract

A series of Cu–ZrO2 catalysts with different copper contents have been prepared by the coprecipitation method. Their catalytic behavior was studied for glycerol hydrogenolysis reaction to obtain 1,2-propanediol (1,2-PDO) joint to deactivation mechanism and regeneration protocols. A number of physical chemical techniques as X-ray diffraction (XRD), evolved gas analysis by mass spectrometry (EGA-MS), temperature programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS) and chemical analysis have been used to characterize the precursors, activated and spent catalysts. Cu–ZrO2 catalysts with higher atomic ratio Cu/Zr showed higher selectivity while glycerol conversion values were not significantly changed. In terms of stability a decreasing of yield to 1,2-PDO due to a decrease of its selectivity was observed with the number of cycles. The main cause of deactivation was associated to the progressive formation of organic deposits on the surface of catalyst. A regeneration process highly efficient, where almost complete recovery of yield to 1,2-PDO shown by the fresh catalyst was reached, has been identified.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (216 K)Download as PowerPoint slideHighlights► Cu–ZrO2 catalysts with higher atomic ratio Cu/Zr showed higher selectivity while glycerol conversion values were not significantly changed. ► The deactivation of the catalysts observed after its reuse mainly affects to 1,2- PDO selectivity. ► The deactivation on this system is mainly attributed to the progressive formation of organic deposits on the metallic Cu species. ► A highly efficient regeneration process has been identified.

Keywords
Glycerol; Hydrogenolysis; CuZr catalysts; Coprecipitation; Regeneration
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Stability and regeneration of Cu–ZrO2 catalysts used in glycerol hydrogenolysis to 1,2-propanediol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 210, 1 July 2013, Pages 98–105
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