The Temkin Equation Assumptions and Implications

We have seen in the last Section how distinguishing between true and apparent activation energies may resolve the long-standing debate over the significance of compensation phenomena, and in Section 5.2.5 how these distinct quantities are linked through the heats of adsorption of the reactants by the Temkin equation (5.31). It is now necessary to explore the assumptions underlying this equation, and to pursue certain implications that arise fi om it. 

A related problem arises with the hydrogenation of aromatic molecules, where it is well documented that orders with respect to both reactants increase with 

The main types of laboratory reactor were introduced in Section 5.2.3, and, since (as the reader is constantly reminded) this is not intended as a handbook of catalytic practice, all that is necessary now is to add a little further detail, and briefly allude to other types of reactor that may be encountered. 

First of all, it is not proposed to deal at all with pilot plant or industrial-scale reactors, as this is a very specialised area, adequately covered in existing 

A further advance is the TAP (Temporal Analysis of Products) reactor, where very fast reaction steps can be followed, but the equipment needed is sophisticated, and has not been much used for reactions of interest to us. Catalytic reactions can also be run in an infrared spectrometer cell, so that adsorbed species can be inspected after if not during reaction. Finally reactions can now readily be performed inside UHV apparatus, so that detailed knowledge of the state of the surface single crystals during and after reaction is accessible.  

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