3. A first order decay reaction is occurring in a single CFSTR. Dividing the reactor into twosmaller CFSTRs that are operated in series (effluent from one serving as the influent to theother) reduces the overall mixing and therefore makes the flow more PFR-like. Becausereaction efficiency is greater in a PFR than a CFSTR, we might expect that dividing the reactorwould improve the efficiency. To test that hypothesis, consider a system receiving an influentwith C = 100 mg/L of a reactant that undergoes a first order decay reaction with a rateconstant of 0.1 min ¹. Assume that the system has a total hydraulic detention time of 1 hour,but that it can be operated in three different ways: as a PFR, a CFSTR, or as two CFSTRs inseries with the detention time split equally between the two. Find the effluent concentrationsfor the three possible operating modes

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first order decay reacti ler CFSTRS that are ope er) reduces the overall m tion efficiency is greate ld improve the efficienc C= 100 mg/L of a reac stant of 0.1 min ¹. Assu that it can be operated es with the detention ti

first order decay reacti ler CFSTRS that are ope er) reduces the overall m tion efficiency is greate ld improve the efficienc C= 100 mg/L of a reac stant of 0.1 min ¹. Assu that it can be operated es with the detention ti

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?

Question

3. A first order decay reaction is occurring in a single CFSTR. Dividing the reactor into two
smaller CFSTRs that are operated in series (effluent from one serving as the influent to the
other) reduces the overall mixing and therefore makes the flow more PFR-like. Because
reaction efficiency is greater in a PFR than a CFSTR, we might expect that dividing the reactor
would improve the efficiency. To test that hypothesis, consider a system receiving an influent
with C = 100 mg/L of a reactant that undergoes a first order decay reaction with a rate
constant of 0.1 min ¹. Assume that the system has a total hydraulic detention time of 1 hour,
but that it can be operated in three different ways: as a PFR, a CFSTR, or as two CFSTRs in
series with the detention time split equally between the two. Find the effluent concentrations
for the three possible operating modes

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