Oxidation catalysts, mild

With straight chain butenes, there is a larger number of possibilities. With mild oxidation catalysts, the reaction is directed to dehydrogenation, e.g. for 1-butene... 

This paper presents a comprehensive description of mild oxidation catalysts containing one or more oxides or oxysalts and analyzes the thermodynamic and structural influence of interfacial effects between the constituent solid phases on activity and selectivity (O. 

The question arises, why do bi- or multi-phasic catalysts generally show better activity and selectivity than the active phase alone The aim of this paper is to answer this question by exploring the role of interfacial effects. We shall examine first how the thermodynamic and structural properties of one phase influence its interactions, not only with the gaseous reactants, but also with coexisting solid phases as a result of its bulk, surface, and defect structure. We will also examine the conditions necessary for these interactions and set up a structural classification of the main components of mild oxidation catalysts. This will lead finally to a discussion of the role of interfacial effects in catalyst performance using some illustrative examples. Thermodynamic and Structural Properties of Single Phase Catalysts... 

Thermodynamic aspects must be taken into acount, not only concerning the reaction itself, but also with regard to the solid state. Most of the mild oxidation catalysts exhibit either a low., MoO. ..), or first or second order polymorphic he reaction temperature, as in the case of ) (20, 21), or the , , ... 

Mild oxidation catalysts are generally composed of phases having... 

COURTINE Interfacial Effects in Mild Oxidation Catalysts... 

Since in most cases tjie specific area of mild oxidation catalysts is small (2-30 m. g ), the external aspects of the... 

The second important structural series of mild oxidation catalysts are the oxysalts which contain discrete metal-oxygen molecular complexes, (MO). Two types of metal-oxygen bonds are usually... 

Figure 1. ReOg matrices as mild oxidation catalysts ...

Mild oxidation catalysts are made up of phases, the selectivity of which depends directly or indirectly on their thermodynamic and structural properties ... 

Courtine, P. Thermodynamic and structural aspects of interfacial effects in mild oxidation catalysts. In Solid State Chemistry in Catalysis. Grasselli, R.K. and Brazdil, J.F. Eds. ACS. Symposium Series, Vol. 279, 1985, p. 37-56. 

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