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Reaction temperature controlled selective hydrogenation of dimethyl oxalate to methyl glycolate and ethylene glycol over copper-hydroxyapatite catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
45671 46418 2015 11 PDF Available
Title
Reaction temperature controlled selective hydrogenation of dimethyl oxalate to methyl glycolate and ethylene glycol over copper-hydroxyapatite catalysts
Abstract

•Cu/HAP catalysts are synthesized by a facile AAOPS method.•70% yield of MG could be obtained under 483 K.•The selectivity to MG and EG could be adjusted by the reaction temperatures.•The copper phosphate species and the hydroxyl groups play important roles.•High stability is observed.

Copper based hydroxyapatite (HAP) supported (Cu/HAP) catalysts are synthesized by a facile ammonia-assisted one-pot synthesis (AAOPS) method and carefully studied on the selective hydrogenation of dimethyl oxalate (DMO). The Cu/HAP catalysts exhibit different catalytic performance compared with the conventional Cu/SiO2 ones. When the reaction temperatures are set at 483 K, the optimal Cu/HAP catalyst displays relatively high and stable catalytic performance with methyl glycolate (MG) as the main product. The yield to MG can reach 70% which is the highest value on the copper based catalysts till now. When the reaction temperature is risen to 513 K, the selectivity of the catalysts swifts to the ethylene glycol (EG), and the catalytic behavior is similar to the traditional Cu/SiO2 catalysts. It was found that the copper phosphate species play important roles in stabilizing the copper particles and the Cu+ species. Also, the abundant surface hydroxy groups on the catalysts are responsible for the distinct catalytic performance of the Cu/HAP catalysts.

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Keywords
Hydroxyapatite; Copper based catalysts; Dimethyl oxalate; Methyl glycolate; Ethylene glycol
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Reaction temperature controlled selective hydrogenation of dimethyl oxalate to methyl glycolate and ethylene glycol over copper-hydroxyapatite catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 162, January 2015, Pages 483–493
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