mass transfer

Mass transfer zone (MTZ) is an important factor to packed bed adsorber design. Which of the following expressions about MTZ is not correct?

A.A small/narrow MTZ means sharp concentration profile.

B.A small/narrow MTZ means steep breakthrough curve.

C.A small/narrow MTZ means good utilization of adsorbent.

D.A small/narrow MTZ means short breakthrough time.

E.A small/narrow MTZ means short length of unused bed (LUB).