Reactor heat integration appropriate placement

The appropriate placement of reactors, as far as heat integration is concerned, is that exothermic reactors should be integrated above the pinch and endothermic reactors below the pinch. Care should be taken when reactor feeds are preheated by heat of reaction within the reactor for exothermic reactions. This can constitute cross-pinch heat transfer. The feeds should be preheated to pinch temperature by heat recovery before being fed to the reactor. 

Reaction placement implies appropriate heat integration of the reaction effluent. The reactor integration can be evaluated by the process GCC, which is constructed without the reaction effluent stream and then the reaction effluent stream is placed on top of the GCC. The general appropriate placement principle states that the heat of the reaction effluent should be released above the process pinch. 

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