
74 Green Chemical Engineering
Any mass transfer equipment that is used for contacting two different phases P1 and
P2 can also be used as a heterogeneous reactor for carrying out reactions involving these
phases. For example, consider a chemical reaction between CO
2
(compound A) in gas phase
(P1) and NaOH solution (compound B) in liquid phase (P2)
CO NaOH() Na CO
2()gl
(2.186)
This reaction can be carried out in a packed tower, which is usually used for mass trans-
fer operations involving gas and liquid phases such as absorption. Here, the reactor is the
packed bed reactor (Figure 2.29).
Consider the chemical reaction between FeS
2
in the ...