Title of Thesis
Preparation and Characterization of Copper-Chromia
Supported Catalyst for Conversion of Cyclohexane
National Centre for Excellence in Physical
Chemistry / University of Peshawar, Peshawar
|Number of Pages|
|Keywords (Extracted from title, table of contents and
abstract of thesis)|
Preparation, Characterization, Copper, Chromia,
Catalyst, Conversion, Cyclohexane, benzene, dehydrogenation
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 (370°C). Reaction in nitrogen atmosphere was negligible. In the presence of oxygen, major product were benzene MCP and water. No MCP was detected below 573K (300°C).
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.