In: Chemistry
What are the three types of recycle structures possible in a chemical process? Explain when each is used.
(a) Separate/purify unreacted feed and recycle use when separation is feasible.
(b) Recycle without separation but with purge when separation of unused reactants is infeasible/uneconomic. Purge is needed to stop build-up of product or inerts.
(c) Recycle without separation or purge product/byproduct must react further through equilibrium reaction.