The General Mole Balance

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• The General Mole Balance
• Ideal Reactors

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Example of Reactor Design
In Out Generation Accumulation
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The Generation Term
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The General Mole Balance
Lets apply it to the three ideal reactors!
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Batch Reactor
Perfectly mixed No flow in or out
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Batch Reactor
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Batch Reactor
And if the volume is not a function of time
(constant)
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Continuous Stirred Tank ReactorCSTR
Perfectly mixed Steady state
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CSTR
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CSTR
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Plug Flow ReactorPFR
No radial gradients only axial Steady state
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PFR
This is the integral form. Often the differential
form is more useful. Take the derivative with
respect to volume of each term.
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PFR
Derivative of a constant is just 0
rA
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PFR