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Vapor-phase hydrogenolysis of biomass-derived lactate to 1,2-propanediol over supported metal catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42824 45942 2008 8 PDF Available
Title
Vapor-phase hydrogenolysis of biomass-derived lactate to 1,2-propanediol over supported metal catalysts
Abstract

Vapor-phase hydrogenolysis of ethyl lactate to 1,2-propanediol was performed over a series of SiO2 supported metal (Fe, Co, Ni, Ru, and Pd) catalysts in a fixed-bed reactor. Among them, the Co/SiO2 and Cu/SiO2 catalysts exhibit promising performance, and the Co/SiO2 were more active than the traditional copper catalysts under mild conditions. Effects of support, metal loading and preparation method were investigated to optimize the performance of the Co-based catalysts. Over the optimal catalyst (a 10 wt.% Co/SiO2 catalyst prepared via rotary evaporation drying method), the 1,2-propanediol selectivity was in excess of 98% at 90.2% lactate conversion, 2.5 MPa and 160 °C. The cobalt catalysts were characterized by X-ray diffraction (XRD) and temperature programmed reduction by H2 (H2-TPR) and temperature programmed desorption of H2 (H2-TPD). Interestingly, a quasi-linear correlation is observed between the average reaction rate and the percentage of bulk-like Co3O4 phase precursors, suggesting that the metallic cobalt from the bulk-like Co3O4 phase precursor is more active than that from the cobalt surface support species. The emerging technologies for production of low-cost lactate ester, make this high-yield route a sustainable benign process for 1,2-propanediol.

Graphical abstractThe SiO2 supported cobalt catalysts are active for vapor-phase hydrogenolysis of ethyl lactate to 1,2-propanediol at mild conditions. Interestingly, a quasi-linear correlation is observed between average reaction rate and the percentage of the bulk-like Co3O4 phase precursors, suggesting that the metallic cobalt from the bulk-like Co3O4 phase precursor is more active.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ethyl lactate; 1,2-Propendiol; Co/SiO2; Hydrogenolysis
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Vapor-phase hydrogenolysis of biomass-derived lactate to 1,2-propanediol over supported metal catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 349, Issues 1–2, 31 October 2008, Pages 204–211
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