الفهرس 
INTRODUCTION AND OBJECT OF INVESTIGATIONOnly 14 pages are availabe for public view
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Abstract
The studies froming the sudject matter of this thesis adress two main questions related to the scientific basis of the preparation of supported oxide catalysts, via impregnation
3.Loading of the catalyst precursor species onto the support material, w~s effected by impregnation via adsorption from solu’tion. To do so, the support was maintained in contact (for 24h) with the aquated precursor species, while stirring, and then separated
residue (the impregnated support) was subsequently dried at 60 °C
The uptake of the precursor species from variously concentrated impregnating solutions, was followed colourimetricaley. Simultaneous acidity changes were pH-metrical~y determined.
The dried impregnated supports were examined by UV/Vis diffuse reflectance spectroscopy and X-ray diffractometry, so as to reveal the identity of the chromia bulk and surface species established in the material.
6.The final catalysts were then obtained by calcination at 600 °c for 3h of the impregnated parents, and their physicochemical characteristics were disclosed by a further UV/Vis diffuse reflectance and XRD
examinations