cryo-cold-box
Cryogenic separation (cold box)
Process Semi-native
TRL Mars
4 / 9
Energy intensity
very_high
Required by
2
Requires
8
Fractionates the olefin stream by boiling point. Most energy-hungry block in the plant.
Inputs: Olefin mix Electricity Nitrogen (refrigerant / blanket gas)
Built from: Brazed Al plate-fin exchanger Turbo-expander Cryo compressor Distillation column Cryo instrumentation & control
Outputs: Ethylene (refrigerated tank) Propylene (pressurised tank) light-ends