Thermal effects of the interactions of carbon monoxide with zeolites

The interactions of carbon monoxide with Lewis acid sites of zeolites were investigated using microcalorimetric and temperature programmed desorption (TPD) techniques. Carbon monoxide was adsorbed at 25°C on transition-metal ion-exchanged FAU (Y and X) and MOR type zeolites. The differential heats o...

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Bibliographic Details
Published inThermochimica acta Vol. 379; no. 1; pp. 77 - 84
Main Authors Rakić, Vesna M., Dondur, Vera T., Hercigonja, Radmila V.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 22.11.2001
Elsevier Science
Subjects
Acid site
Adsorption
Carbon monoxide
Catalysis
Catalysts: preparations and properties
Chemistry
Differential heat
Exact sciences and technology
General and physical chemistry
Ion-exchange
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Zeolite
Zeolites: preparations and properties
Differential heat
Acid site
Zeolite
Carbon monoxide
Adsorption
Heterogeneous catalysis
Lewis site
Acidic site
Thermodesorption
Microcalorimetry
Thermodynamic properties
Heat of adsorption
Molecular sieve
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Summary:The interactions of carbon monoxide with Lewis acid sites of zeolites were investigated using microcalorimetric and temperature programmed desorption (TPD) techniques. Carbon monoxide was adsorbed at 25°C on transition-metal ion-exchanged FAU (Y and X) and MOR type zeolites. The differential heats of adsorption ( Q dif) indicate the heterogeneity of the acid sites, in all the investigated systems. The specific interactions of CO with the strongest acid sites were recognized. The results of TPD confirm that CO molecules were adsorbed on the sites of different strength.
ISSN:0040-6031
1872-762X
DOI:10.1016/S0040-6031(01)00605-0