Exhibition & Conference

13-16 September 2021

Singapore EXPO, Singapore

Technical Programme

Martin Mayer

Director LNG Technology


12:15 - 12:45

Wednesday, 18 September 2019

T1.4 ZR-LNG Innovative Self-Refrigeration Technology for LNG with Integrated Liquids Removal

ZR-LNG, an innovative self-refrigeration liquefaction technology, provides multiple benefits;

  • Reduction in CAPEX, $/tpa
  • Reduced equipment count
  • Improved safety profile
  • Opportunities for standardisation
  • Simple and flexible operation

The patented ZR-LNG dual methane expander process requires no external gaseous or liquid hydrocarbon refrigerants, no refrigerant extraction, import system or storage facilities and no ongoing refrigerant make-up. It provides a simpler and safer low-cost liquefaction solution whilst achieving an energy efficiency comparable to competing hydrocarbon based refrigerant processes. This development results in a concept well suited to standardisation in 1.0 and 1.5 Mtpa modules for application offshore where weight and space constraints and emphasis on safety are key design drivers.

The recently patented IHR (Integrated Heavies Removal) variant processes heavy components, BTX and ethane within the expander-based ZR-LNG liquefaction unit, without need for a scrub column, stand-alone upstream turbo-expander NGL recovery unit or separate cryogenic ethane recovery unit, thus significantly reducing investment cost and footprint.

The paper will provide data on a 1.5 million tpa modularised unit and data on the performance of the IHR system in respect of benzene removal and ethane recovery integral within the ZR-LNG configuration.