Debutanizer Column

LPG LNG CNG

	LPG	LNG	CNG
	Propane and Butane	Methane	Methane cryogenically liquefied
	C3H8 and C4H10	CH4
	93.2 MJ/m3	38.7 MJ/m3
	Derived form NG processing and crude oil refining	Natural Gas
	Propane is heavier than air	Methane is lighter than air

Pronounciation

• Propane (/ˈproʊpeɪn/)
• Butane (/ˈbjuːteɪn/)
• Isopenten /i.zɔ.pɛ̃.tan/

Natural Gas Processing

Raw natural gas typically consists primarily of methane (CH4) and ethane (C2H6) and also contains

• Heavier gaseous hydrocarbons: propane (C3H8), normal butane (n-C4H10), isobutane (i-C4H10) and pentanes.
• CO2, H2S, N2, He

NGL Fractionation

• The recovered NGL stream is processed through a fractionation train consisting of up to five distillation towers in series: a demethanizer, a deethanizer, a depropanizer, a debutanizer and a butane splitter.
• In the debutanizer column C3 (propane) and C4 (butane) are removed as overheads from the naphtha stream.