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Preparation, characterisation and testing of catalytic polymeric membranes in the oxidation of benzene to phenol

Paper ID Volume ID Publish Year Pages File Format Full-Text
43122 45956 2009 10 PDF Available
Title
Preparation, characterisation and testing of catalytic polymeric membranes in the oxidation of benzene to phenol
Abstract

Liquid-phase catalytic oxidation of benzene to phenol has been studied under mild conditions using catalytic polymeric membranes. They were prepared by dissolving the polymer polyvinylidene fluoride (PVDF) in different solvents, (dimethylacetammide (DMAc), dimethylformammide (DMF) and 1-methyl-2-pyrrolidone (NMP)) and filled with two types of copper oxides catalysts. Membranes were characterised morphologically by scanning electron microscopy (SEM), pore size distribution, contact angle measurements and BET surface area. It was found that DMAc was the best solvent and that membranes filled with the CuO nanopowder catalyst presented an improved wettability to reacting mixture.Reactivity tests, performed at contact time in the range 4–19.4 s between reagents and catalyst, showed a higher phenol concentration using the PVDF membrane filled with the CuO nanopowder rather than CuO powder catalysts. Phenol productivity of 72.5 gphenol gcat−1 h−1 and a phenol yield of 2.3% were obtained in a single pass using a contact time with the catalyst of 19.4 s at 35° C in presence of ascorbic acid.

Graphical abstractPolyvinylidene fluoride membranes filled with CuO nanopowder catalyst were more effective than CuO powder in the liquid-phase oxidation of benzene to phenol performed under mild conditions in an ultrafiltration membrane reactor changing the contact time between reactants and catalyst as in figure. A maximum productivity of 72.5 gphenol gcat−1 h−1 and phenol yield of 2.3% in one pass were obtained.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Catalytic polyvinylidene fluoride membranes; Liquid phase benzene oxidation to phenol; Copper(II) oxide catalyst; Ultrafiltration membrane reactor; Filled catalyst organic membrane; BET surface area
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Preparation, characterisation and testing of catalytic polymeric membranes in the oxidation of benzene to phenol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 358, Issue 2, 1 May 2009, Pages 119–128
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
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