Chemical Reaction Engineering
Find a mechanism that is consistent with the rate equation and reaction given below: 2A + B → A₂B, ( - rA) = k.CA.CB

A + A ⇋ AA;AA + B → A₂B
A + A ⇋ AA;AA + B → A₂B
A + B ⇋ AB ; AB + A → A₂B
A + B ⇋ AB;AB + A → A₂B

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Chemical Reaction Engineering
In case of staged packed bed reactors carrying out exothermic reaction, use

Plug flow for dilute liquid requiring no large preheating of feed
All of these
High recycle for pure gas
Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature

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