9873

Sensitivity of a Plug Flow Reactor to Model Parameters

Gas-phase series reactions () take place in a non-isothermal plug flow reactor (PFR). Both reactions are first order. In this Demonstration you vary seven of the parameters used in the model and two of the feed conditions (temperature and flow rate) over relatively narrow ranges of values. Changing the feed temperature and flow rate shows how sensitive the reaction is to the feed conditions. You can vary each parameter and feed condition a maximum of ±10% as a way to illustrate the sensitivity of the model to the values of the parameters (parametric sensitivity) and what effects inaccuracies in their values have on the reactor conditions calculated. Since parameters used in a reactor simulation are not always known accurately, performing a parametric sensitivity analysis can be valuable.

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DETAILS

Rate Laws
rate of first reaction ()
rate of second reaction ()
rate constant for first reaction ()
rate constant for second reaction ()
concentration of ()
concentration of ()
pre-exponential factor for first reaction ()
pre-exponential factor for second reaction ()
activation energy for first reaction ()
activation energy for second reaction ()
ideal gas constant ()
reaction temperature ()
inlet concentration of reactant ()
inlet concentration of ()
molar flow rate of (mol )
molar flow rate of (mol )
molar flow rate of (mol )
total molar flow rate (mol )
inlet temperature ()
Mole and Energy Balances
volume ()
heat transfer coefficient times heat transfer area per volume ()
coolant temperature ()
heat of reaction for first reaction ()
heat of reaction for second reaction ()
heat capacity of ()
heat capacity of ()
heat capacity of ()
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