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Title of Thesis

Preparation and Characterization of Copper-Chromia Supported Catalyst for Conversion of Cyclohexane

Author(s)

Masood Khan

Institute/University/Department Details
National Centre for Excellence in Physical Chemistry / University of Peshawar, Peshawar
Session
2001
Subject
Physical Chemistry
Number of Pages
166
Keywords (Extracted from title, table of contents and abstract of thesis)
Preparation, Characterization, Copper, Chromia, Catalyst, Conversion, Cyclohexane, benzene, dehydrogenation

Abstract
structural isomerization and dehydrogenation of cyclohexane to methyl-cyclopentane(MCP) and benzene were studied on pure and supported copper-chromic catalysts in continuous reactant flow mode. The products were analysed by gas chromatography. Reaction temperature was 643K (370C). Reaction in nitrogen atmosphere was negligible. In the presence of oxygen, major product were benzene MCP and water. No MCP was detected below 573K (300C).
10 wt% Cu/Cr2O3 was found to be the most active catalyst for structural isomerization and dehydrogenation of cyclohexane. The catalyst retains its activity for longer time (up to 3 months).
Analysis of the rate at various reactant pressures, contact times, activation energies, etc. show that the reaction, in the temp. range 573 - 653K, is in a transition state between kinetic and diffusion control.
Catalyst were charaterized by XRD, SEM techniques. Surface area measurements were made by adsorption of nitrogen at liquid nitrogen temperature.

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S. No. Chapter Title of the Chapters Page Size (KB)
1 0 CONTENTS

 

 
84 KB
2

1

INTRODUCTION 1
2,543 KB
3 2 EXPERIMENTAL 40
1,415 KB
4 3 RESULTS AND DISCUSSIONS 71
3,689 KB
5 4 REFERENCES 150
500 KB