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Oxidation of cyclooctane over metalloporphyrin-exchanged Al,Si-mesoporous molecular sieves of HMS (MMS) type

Paper ID Volume ID Publish Year Pages File Format Full-Text
43942 45996 2006 6 PDF Available
Title
Oxidation of cyclooctane over metalloporphyrin-exchanged Al,Si-mesoporous molecular sieves of HMS (MMS) type
Abstract

Me(TMPyP) metalloporphyrin catalysts (Me = Mn, Fe, Co) supported on aluminated MMS (HMS) mesoporous silicas were investigated in the liquid phase oxidation of cyclooctane with molecular oxygen (as air) without the use of sacrificial co-reductant. Catalytic activity was shown to depend on the the metalloporphyrin surface density, the pore size of the support and the nature of the metal centre in Me(TMPyP). Increase in metalloporphyrin loading above a certain optimum value resulted in reduction of the catalyst activity attributed to the lessening of site isolation effect. Cyclooctanone and small amounts of cyclooctanol were the only products of the reaction. The enhanced selectivity to cyclooctanone (over 90%) was assigned to steric effect imposed by the mesoporous silica supports. The supported metalloporphyrin catalyst could be reused without any significant loss of its activity.

Keywords
Metalloporphyrins; Mesoporous molecular sieves; Hydrocarbon oxidation; Cyclooctane
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Oxidation of cyclooctane over metalloporphyrin-exchanged Al,Si-mesoporous molecular sieves of HMS (MMS) type
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 313, Issue 1, 25 September 2006, Pages 106–111
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