Original scientific paper

Action of Salt Formation on the Bifunctional Nature of 12- Molybdophosphoric Acid and Their Relationship to the Catalytic Activity

A. M. El-Awad ; Chemistry Department, Faculty of Science, Assiut University Assiut, Egypt
K. M. Abd El-Salaam ; Chemistry Department, Faculty of Science, Assiut University Assiut, Egypt

Abstract

Acidic properties and the catalytic activity of 12-molybdophosphates
(M"nn+H3-,PM012040; M = Cu2+, BP+, Cr3+ and X = 1-3) have been studied. The results are discussed as the effect of these catalyst components on the partial charge on oxygen atom which is in a relation with the acidity. It is shown that the oxygen-hydrogen bond is weakened as the value of partial charge on oxygen (-bo) becomes more negative, while the vapor-phase dehydration activity of 2 propanol is explained on the basis of the reacting zone wideness taking into account the pseudo liquid phase nature of the heteropoly compounds. Correlation, the percentage conversion of 2-propanol with the fractional charge on molybdenum atom was successful to interpret the effect of the redox properties of these catalysts on their catalytic activity.

Keywords

Hrčak ID:

176394

URI

https://hrcak.srce.hr/176394

Publication date:

23.12.1987.

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