ReactXN · free chemical process simulation
Process Simulation.
In the browser.
ReactXN is a working chemical plant in a tab — kinetics, separation and control solved live in your browser.
C₆H₆ · BENZENE
THE MOLECULE THE ENGINE SEPARATES
Unit capabilities
Three units, one engine. Every mark is a solved equation, not a roadmap item.
Draw the plant.
Drag units in. Wire them up. The drawing is the model.
Solve the chemistry.
Change anything — temperature, flow, volume. Conversion follows instantly.
Split the phases.
One flash, two streams. The mass balance closes exactly.
Close the loop.
A controller holds your setpoint. It will not wind up.
The series
Twelve boards on how the engine works, drawn in ink and white. They ship in the repository.
Process simulation. In the browser.
No cloud, no black box — a flowsheet you can inspect and change in real time.
It walks there.
Four slopes, one fourth-order estimate, every 0.1 seconds.
The flash does not guess.
It solves for the vapour fraction that makes both phases agree.
A mass balance is a promise.
The audit still knows where every mole went.
Anti-windup.
When the output saturates, the integral stops pretending it can help.
Open a tab.
Draw something that can be solved. That is the onboarding.
Build a real plant on the RXN engine
- RK4
- Wilson
- Antoine
- Rachford–Rice
- PID
RXN
Flowsheet
Kinetics
Separation
Control
The drawing is the model — tagged, wired, solved.
- Integrator steps per second
- 60
- Mass-balance closure, asserted
- 1e-12
- Tests passing
- 85
- Servers required
- 0