A stirred-tank blending system initially is full of water and is being fed pure water at a constant flow rate, q. At a particular time, an operator adds caustic solution at the same volumetric flow rate q but concentration c. If the liquid volume V is constant, the dynamic model for this process is:

Introduction to Chemical Engineering Thermodynamics
8th Edition
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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A stirred-tank blending system initially is full of water
and is being fed pure water at a constant flow rate, q.
At a particular time, an operator adds caustic solution
at the same volumetric flow rate q but concentration Cį.
If the liquid volume V is constant, the dynamic model
for this process is:
.dc
dt
y
+ qc = qci
with c(0) = 0
What is the concentration response of the reactor ef-
fluent stream, c(t)? Sketch it as a function of time.
Data: V = 2 m³;q=0.4 m³/min ci = 50 kg/m³
Transcribed Image Text:A stirred-tank blending system initially is full of water and is being fed pure water at a constant flow rate, q. At a particular time, an operator adds caustic solution at the same volumetric flow rate q but concentration Cį. If the liquid volume V is constant, the dynamic model for this process is: .dc dt y + qc = qci with c(0) = 0 What is the concentration response of the reactor ef- fluent stream, c(t)? Sketch it as a function of time. Data: V = 2 m³;q=0.4 m³/min ci = 50 kg/m³
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