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sci.cstr-reactor-design Calculator
Calculates CSTR reactor volume, conversion, and residence time from rate law kinetics and desired production rate. For first-order kinetics, CSTR requires larger volume than a PFR for the same conversion — a CSTR achieves 90% conversion at Damköhler number Da = kτ = 9.
Inputs
Inlet Flow L S
Volume of fluid per unit time. Used to size pipes, pumps, and ducts.
Initial Conc Mol L
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Conversion Pct
Reference formula or conversion factor shown for context.
Rate Constant 1 S
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Results
reactor volume V (L)
The computed three-dimensional volume.
residence time τ (s)
The computed duration or time value.
exit concentration (mol/L)
The proportional relationship between two quantities.