What is the Reactor Designer multi-solver?

Reactor Designer is a guided workflow that chains 2 individual PolySim solvers into one end-to-end analysis, piping each result into the next step.

Yes. Every step runs entirely in your browser using real numerics — no install, no account, no cloud cost. Custom or private solver packs are available as a paid service.

Chemistry & Materials Pack · Multi-Solver

Reactor Designer

Conversion & heat. This multi-solver chains 2 solvers into a single guided workflow — run each step in order and carry the result forward.

Workflow steps

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Reaction Kinetics

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Reaction KineticsLive

rate laws · Arrhenius temperature

Controls

Presets

Watch reactant concentration fall over time. The reaction order sets the curve shape; raising temperature speeds the rate constant, Arrhenius-style.

Rate constant k

Temperature factor

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Data Inspector

Order1

Effective k0.300

Arrheniusk = A·e^(−Ea/RT)

Governing equation

rate = k_{eff} [A]^{1} = 0.30 [A]^{1}

Reading this result: First-order: [A] decays exponentially with a constant half-life; raising temperature lifts k_eff to 0.30, steepening the curve Arrhenius-style.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

↓

Equilibrium

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Chemical Equilibrium (Le Chatelier)Live

A ⇌ B shifting with stress

A (reactant)0.67 M

⇌

B (product)1.33 M

Controls

A reversible reaction A ⇌ B settles where forward and reverse rates balance. Add reactant or raise temperature and watch the equilibrium shift to relieve the stress.

Presets

Equilibrium constant K

Amount added

Temperature factor

▶ Run in Python

Data Inspector

K (effective)2.00

[A]0.67

[B]1.33

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Governing equation

K_{e q} = \frac{[ B ]}{[ A ]} = \frac{1.33}{0.67} \approx 2.00

Reading this result: Effective K is near 1, so A and B coexist in comparable amounts and a small stress can tip the balance either way.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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More in the Chemistry & Materials pack

Reaction Engineering Kit Distillation Column pH & Buffer Lab Electrochem Cell Combustion Analyzer Gas Process Kit Polymerization Crystallization

Frequently asked questions

What is the Reactor Designer multi-solver?: Reactor Designer is a guided workflow that chains 2 individual PolySim solvers into one end-to-end analysis, piping each result into the next step.
Is it free to use?: Yes. Every step runs entirely in your browser using real numerics — no install, no account, no cloud cost. Custom or private solver packs are available as a paid service.