Nitric acid, run deliberately away from equilibrium
Ammonia burned over a platinum-rhodium gauze to nitric oxide, oxidized onward to NO₂, then absorbed in water as acid.
The actual dark-mode canvas: ammonia burned in air over a platinum-rhodium gauze to nitric oxide, cooled and oxidized onward to NO₂, then absorbed in water as nitric acid with the tail gas vented.
A reaction run deliberately away from equilibrium
Thermodynamics favours burning ammonia to nitrogen; the platinum gauze exists to win the kinetic race to NO instead, on a millisecond contact time. Treating that stage as an equilibrium reactor would predict the wrong product entirely — which is why the three stages are modelled as three different regimes rather than one convenient one.
Unit ops shipped for this vertical
Combines multiple streams into one, closing the mass and energy balance.
A specified per-pass conversion on a key component — the shortcut counterpart to the equilibrium and kinetic reactors.
Duty- or outlet-condition-specified energy-balance stage.
Flash/phase-split unit op — the foundational vapor-liquid calculation.
Stream burner gauze temperature, oxidizer outlet and absorber acid strength from the plant's OPC-UA server into this flowsheet's twin comparison — gauze selectivity decays over a campaign, and the loss appears as a gap from the solved NO yield.
See the Digital Twin platform →Try it yourself
- ✓Three stages in three genuinely different regimes
- ✓The burner is kinetically selective — equilibrium favours N₂
- ✓Absorption closing the balance to real acid liquor