
170 Green Chemical Engineering
are the concentration of polymers P
2
,…,P
r
in the reactor efuent. Thus, the product is a
mixture of polymer compounds of different chain lengths.
Taking a steady-state monomer balance around the CSTR, we have
Rate of flow of
monomerin
Rate of flow of
monomerout
R
=
+
aateofconversion
of monomer
(3.85)
qC qC VkCkCC kC C
MO MMMP MP
=+ +++
2
2
(3.86)
This equation reduces to
CCkC
MO MM
r
r
=+ +
=
∞
∑
τ 2
2
(3.87)
Taking a steady-state molal balance of polymer chains P
2
,…,P
r
around the CSTR, we get
Rate of flow of
polymer in
Rate of flow of
polymeroutPP
rr
=
−
Netrateofproduction
of polyme