You are given two design considerations: I. Design a reactor with a high single-pass conversion. II. Design a reactor with a low single-pass conversion, add a separation unit to recover remaining...

You are given two design considerations:

I. Design a reactor with a high single-pass conversion.

II. Design a reactor with a low single-pass conversion, add a separation unit to recover remaining reactant, then recycle this recovered reactant.

Which of the two can we consider if we want to achieve high conversion in a reactive process?