Conversion versus Reactor Volume for CSTR and PFTR

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The Demonstration plots the conversion versus reactor volume for either a CSTR (continuous stirred-tank reactor) or a PFTR (plug flow tubular reactor). The volume (in liters) required to obtain 90% conversion in the reaction is indicated by the green dot in the figure. The reaction takes place in the gas phase with a rate constant
. The feed flow rate is
and corresponds to a composition such that
This is a high-pressure gas-phase reaction since
. You can set the value of
. Based on the present calculation, you can draw the following conclusions: (1) to achieve the desired conversion, the required reactor volume is larger for the CSTR than the PFTR; and (2) if the reaction reduces the number of moles (e.g.,
, the required reactor volume is smaller. For example, if
, the reaction produces more moles, thus diluting the reactant
and causing the volume to be larger.
Contributed by: Housam Binous and Ahmed Bellagi (March 2011)
Open content licensed under CC BY-NC-SA
Snapshots
Details
L. D. Schmidt, The Engineering of Chemical Reactions, New York: Oxford University Press, 1998.
Permanent Citation
"Conversion versus Reactor Volume for CSTR and PFTR"
http://demonstrations.wolfram.com/ConversionVersusReactorVolumeForCSTRAndPFTR/
Wolfram Demonstrations Project
Published: March 7 2011