Process recycle purge balance calculator

Calculate reactor inlet reactant and reactant converted with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use reactor inlet reactant and reactant converted to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Fresh reactant feed (mol/s)
100
Single-pass conversion fraction
0.5
Purge fraction of unreacted stream
0.1
Reactor inlet reactant (mol/s)
181.818182
Reactant converted (mol/s)
90.909091
Unreacted purge (mol/s)
9.090909
Recycled reactant (mol/s)
81.818182

Try another scenario

Fresh reactant feed (mol/s)
110.00000000000001
Single-pass conversion fraction
0.5
Purge fraction of unreacted stream
0.1
Reactor inlet reactant (mol/s)
200
Reactant converted (mol/s)
100
Unreacted purge (mol/s)
10
Recycled reactant (mol/s)
90
Calculation method

Calculation method

Reactor inlet reactant (mol/s)

Fresh/[1−(1−conversion)(1−purge)].

Reactant converted (mol/s)

Inlet×conversion.

Unreacted purge (mol/s)

Inlet×(1−conversion)×purge.

Recycled reactant (mol/s)

Inlet×(1−conversion)×(1−purge).

Symbols and units
a
Fresh reactant feed (mol/s)
b
Single-pass conversion fraction
c
Purge fraction of unreacted stream

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Fresh feed, recycle-purge fractions, conversion assumptions. Returns Steady-state stream quantities. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Fresh reactant feed (mol/s): minimum 1e-12, maximum 1000000000000.0. Single-pass conversion fraction: minimum 1e-12, maximum 1. Purge fraction of unreacted stream: minimum 1e-12, maximum 1.
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