Isothermal Plug Flow Reactor: ConcepTest and Example Problem

Try to answer this ConcepTest and solve this example problem before using this module. Studies show that trying to answer the questions before studying material improves learning and retention. By the end of this module, you should be able to answer these on your own. Answers will be given later in this module.

Example Problem 1

Develop equations to determine plug flow reactor size for 50% conversion of reactant A. The reaction is gas-phase, in an isothermal PFR, and is at 5.0 atm pressure and 55°C. The volumetric flow rate of the feed is 50 L/min.

A + 2B → 2D    rA = -2.5CA0.5CB mol L-1 min-1

Feed mole fractions: yA = 0.2, yB = 0.5, yC = 0.3 (C is an inert.)