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Aerobic oxidation of cyclohexane with γ-alumina supported metallophthalocyanines in the gas phase

Paper ID Volume ID Publish Year Pages File Format Full-Text
43709 45984 2007 5 PDF Available
Title
Aerobic oxidation of cyclohexane with γ-alumina supported metallophthalocyanines in the gas phase
Abstract

Unsubstituted phthalocyanines of Co, Fe and Mn supported on γ-alumina were synthesized and characterized with UV–vis and IR spectroscopic techniques. Catalytic activities of the supported phthalocyanines for oxidation of cyclohexane to cyclohexanol and cyclohexanone by air were studied in the gas phase in the absence of solvents and reducing agents. These metallophthalocyanines (MPc) supported on γ-alumina were effective catalysts in a temperature range of 300–400 °C at 1 atm of air. Under these reaction conditions, the order of catalytic activities is as follows: CoPc/γ-alumina > FePc/γ-alumina > MnPc/γ-alumina. When the reaction was catalyzed with γ-alumina without any phthalocyanines, the reaction yield and conversion were reduced considerably compared to those of supported γ-alumina. With 10% CoPc supported on γ-alumina and under our experimental conditions, the conversion percent of cyclohexane is 32.6% with 37.3% selectivity of cyclohexanol + cyclohexanone and 17.4% cyclohexene at 340 °C. To achieve higher conversion of cyclohexane and better selectivity toward cyclohexanone + cyclohexanol, factors such as type and percentage of the metallophthalocyanine, reaction temperature and space velocity were studied, and optimized conditions were investigated.

Graphical abstractMetallophthalocyanines supported on γ-alumina were effective catalysts of cyclohexane oxidation accompanied to cyclohexene formation in a temperature range of 300–400 °C under atmospheric pressure of air and under these reaction conditions, the order of catalytic activities are as follows: CoPc/γ-alumina > FePc/γ-alumina > MnPc/γ-alumina.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Aerobic oxidation; γ-Alumina support; Metallophthalocyanines; Cyclohexane; Cyclohexanol; Cyclohexanone
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Aerobic oxidation of cyclohexane with γ-alumina supported metallophthalocyanines in the gas phase
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 321, Issue 2, 11 April 2007, Pages 135–139
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