Thermodynamics of propane dehydrogenation

Besides several side reactions, the following main endothermic reactions are of importance in the dehydrogenation of propane to propylene  

By selectively removing hydrogen from the reaction mixture, the reaction can be shifted beyond the original thermodynamic equilibrium. In this way reaction limitations can be overcome and the propylene yield enhanced. 

In Fig. 14.3 the equilibrium conversion for these two reactions as a function of temperature is given. From this figure it is concluded that reaction (7) is more 

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