Chemical Reaction Engineering
Batch process is preferred over continuous process, when the

Same equipment can not be used for several processes of the same nature
All of these
Product yields and quality can not be achieved in continuous process, because of long residence time
Sales demand of product is not steady

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Chemical Reaction Engineering
For a heterogeneous catalytic reaction

Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
The catalyst does not form an intermediate complex with the reactant
The surface of the catalyst does not play an important role during reaction
A relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important

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