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LiquefinTM - Dual Mixed Refrigerant Technology

Liquefin™ - Dual Mixed Refrigerant Technology

Natural gas liquefaction for mid to large scale plants

LiquefinTM is a highly efficient process based on Dual Mixed Refrigerant technology and optimized for use with Brazed Aluminium Heat Exchangers (BAHX). The combination of aluminium, which optimizes heat transfer, and a plate-fin assembly, which offers excellent surface exchange by volume, means the BAHX delivers considerable cost savings for large scale LNG production.

With LiquefinTM, the two refrigeration cycle compressors are driven by identical machines. This also helps to reduce capital expenditure.

Overall, LiquefinTM  provides the most cost competitive Liquefied Natural Gas (LNG) product per ton on the market.


Dual Mixed Refrigerant cycle

This technology from Air Liquide Engineering & Construction relies on two refrigeration cycles to produce LNG. Each cycle uses a different mixture of refrigerants.

In both refrigeration cycles, Mixed Refrigerant is compressed, condensed and expanded in one or several steps. The cooling duty generated by the expansions is transferred through Brazed Aluminium Heat Exchangers (BAHX) to the natural gas, eventually allowing its liquefaction.

The composition of each of the Mixed Refrigerant cycles can be optimized to improve heat exchange in the natural gas liquefaction process. It also allows to balance the refrigeration power from one cycle to the other. This gives the advantage of having identical compressor drivers for the two refrigeration cycles.


  • Delivers the most competitive LNG product per ton on the market
  • One of the most efficient processes
  • Optimized for the use of Brazed Aluminium Heat Exchanger
  • Compact and modular design
  •  Identical refrigerant drivers for the two refrigeration cycles

Key figures

Capacity: from 1.5 million tons per annum (mtpa) to 5.0+ mtpa