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Supported palladium catalysts for the selective conversion of cis-2-butene-1,4-diol to 2-hydroxytetrahydrofuran: effect of metal particle size and support

Paper ID Volume ID Publish Year Pages File Format Full-Text
43592 45978 2007 9 PDF Available
Title
Supported palladium catalysts for the selective conversion of cis-2-butene-1,4-diol to 2-hydroxytetrahydrofuran: effect of metal particle size and support
Abstract

Palladium catalysts on different supports (SiO2, Al2O3, TiO2, ZrO2, MgO and ZnO) have been tested in selective liquid phase conversion of cis-2-butene-1,4-diol affording also, when hydrogenated, 2-hydroxytetrahydrofuran. The metal particle size was determined by TEM. The acidic properties of the catalysts were studied by FT-IR spectroscopy using pyridine as probe molecule. The influence of some preparative variables, such as the particle size, the support, the partial hydrogen pressure, on the catalytic behaviour of palladium catalysts has been investigated.TEM measurements indicated that Pd particles diameter observed was in the range 2.5–10 nm. No significant variation of TOF and selectivity values with the metal particle size was observed in this range. Moreover, the activity and the selectivity towards reaction products were found to be strongly dependent on the acid–base characteristics of the support.The acid systems have been found more active and selective to isomerisation and hydrogenolysis products than the basic ones. No hydrogenolysis reaction was observed on basic supports. Among the examined catalysts, Pd/TiO2 resulted the most selective to 2-hydroxytetrahydrofuran. A maximum yield to this compound of about 74% was, in fact, obtained at 0.01 MPa of H2 pressure.

Graphical abstractThe selective conversion of cis-2-butene-1,4-diol to 2-hydroxytetrahydrofuran was studied at 303 K and at 0.01 and 0.1 MPa H2 pressure over palladium catalysts supported on different metal oxides. The acid–base characteristics of the carrier, determined by FT-IR of the adsorbed pyridine, have a significant impact on product selectivity. It has demonstrated that it is possible to tailor an active and selective palladium catalyst for the production of 2-hydroxytetrahydrofuran, by choosing an appropriate support and operating at low H2 pressure. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Supported palladium catalysts; cis-2-Butene-1,4-diol hydrogenation; 2-Hydroxytetrahydrofuran; Isomerisation; Hydrogenolysis
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Supported palladium catalysts for the selective conversion of cis-2-butene-1,4-diol to 2-hydroxytetrahydrofuran: effect of metal particle size and support
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 325, Issue 1, 30 May 2007, Pages 112–120
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
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Any Questions? feel free to contact us