Integrated LNG and NGL Production

Source: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Spring Meeting and Global Congress on Process Safety
  • Presentation Date:
    April 27, 2015
  • Duration:
    30 minutes
  • Skill Level:
    Intermediate
  • PDHs:
    0.50

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Cryogenic NGL extraction plants from natural gas offer an attractive opportunity for LNG production as a side stream. Cold gas is tapped from the overhead of the demethanizer and liquefied via a compact and efficient mixed refrigerant compander process. The enthalpy balance of the NGL plant is maintained by recycling a cold liquid to the NGL column.

The standard concept extracts about 200 tons per day (~130 kgpd) of LNG from the residue gas of a NGL plant with a capacity of 200 MMSCFD. Very favorable economics can be demonstrated, as in addition to the LNG production the NGL plant capacity is boosted by approximately 10%.

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