Structural and textural properties of SnO2-Cr2O3 catalysts

Pure SnO2 and SnO2-Cr2O3 samples of varying chemical compositions were prepared and calcined in temperature range 673-973 K. The structural properties were determined using the DTA and XRD techniques and the textural properties were investigated from the adsorption of nitrogen at 77 K. In the invest...

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Bibliographic Details
Published inMaterials letters Vol. 18; no. 5-6; pp. 273 - 279
Main Authors MOSTAFA, M. R, YOUSSEF, A. M
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier 01.02.1994
Subjects
Catalysis
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Mixed catalyst
Texture analysis
Binary compound
Transition metal Compounds
Experimental study
Calcining
Characterization
Chromium Oxides
Preparation
Tin Oxides
Surface properties
Porosity
Coprecipitation
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Summary:Pure SnO2 and SnO2-Cr2O3 samples of varying chemical compositions were prepared and calcined in temperature range 673-973 K. The structural properties were determined using the DTA and XRD techniques and the textural properties were investigated from the adsorption of nitrogen at 77 K. In the investigated temperature range no spinel structure was detected. Cr2O3 was only detected when it exceeded 15%. The surface area, total pore volume and mean pore radius generally increase with chromia content. Sintering starts to predominate above 500 C and leads to a decrease in the surface area and in pore widening. 28 refs.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0167-577X
1873-4979
DOI:10.1016/0167-577X(94)90007-8