LNG liquefaction, the real C3MR cascade
Natural gas precooled by a closed propane loop, then liquefied against a closed mixed-refrigerant loop in a multi-stream cryogenic exchanger — the dominant process behind most of the world's LNG capacity.
Process modules
Natural gas precooled by a closed propane loop and liquefied to ~120 K against a closed mixed-refrigerant loop in a multi-stream exchanger.
Open process page →Sour gas and lean MDEA/piperazine solvent contacting in a high-pressure absorber, with a low-pressure stripper regenerating the solvent.
Open process page →CO2-laden syngas scrubbed by cold methanol — Rectisol's real solvent — then the rich solvent regenerated by a pressure letdown, no reboiler.
Open process page →Wet gas contacted with lean triethylene glycol, then regenerated across two flashes to meet pipeline water spec.
Open process page →A four-column cascade — demethanizer, deethanizer, depropanizer, debutanizer — recovering sales gas plus ethane, propane, and butane.
Open process page →