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Palladium-promoted Co–SiO2 catalysts for 1,4-butanediol cyclization

Paper ID Volume ID Publish Year Pages File Format Full-Text
42699 45937 2009 8 PDF Available
Title
Palladium-promoted Co–SiO2 catalysts for 1,4-butanediol cyclization
Abstract

The conversion of 1,4-butanediol to 2,3-dihydrofuran and tetrahydrofuran over Co–SiO2 and Co,Pd–SiO2 catalysts with 0.09, 0.46, 0.90 and 1.90 wt.% Pd have been investigated in a liquid phase. The Co loading was 40 wt.%. The catalysts were prepared by mechanochemical techniques and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction (TPR) methods. The catalysts with 0.46 and 0.90% Pd were the best for the 1,4-butanediol cyclization. Palladium decreases the reduction temperature of cobalt phase by 165–185 °C down to 240–260 °C optimum concerning the yield of 2,3-dihydrofuran. It was found by XPS method that an optimum in the degree of cobalt reduction for the reaction of 1,4-butanediol cyclization exists in the region 7–12%. The comparison of nominal catalysts composition and XPS data suggests surface enrichment with palladium after reduction.

Graphical abstractConversion of 1,4-butanediol into 2,3-dihydrofuran and tetrahydrofuran over Co–SiO2 and Co,Pd–SiO2 catalysts has been studied in a liquid phase. Co–SiO2 catalyst's selectivity to 2,3-dihydrofuran and tetrahydrofuran changes drastically after Pd-promotion. Figure optionsDownload full-size imageDownload as PowerPoint slideCatalysts were prepared by mechanochemical treatment of Co3O4, PdCl2 and SiO2.

Keywords
1,4-Butanediol; 2,3-Dihydrofuran; Tetrahydrofuran; Cobalt–palladium–silica catalysts
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Palladium-promoted Co–SiO2 catalysts for 1,4-butanediol cyclization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 362, Issues 1–2, 30 June 2009, Pages 147–154
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
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