Development of the ZR-LNG Process for Mid-scale liquefaction and monetization of stranded gas reserves

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GASCONSULT LIMITED has developed and patented a new natural gas liquefaction technology, Zero RefrigerantLNG (ZR-LNG). The technology is highly differentiated; unlike competing processes it uses no externalrefrigerants, relying on use of the natural gas feed in an optimised system of expanders to effect refrigeration.This eliminates certain process equipment reducing cost and footprint. Make-up refrigerant is low cost naturalgas as opposed to imported nitrogen or a cocktail of liquid hydrocarbons making the process particularly suitedto remote locations and less developed economies. The ZR-LNG system is highly efficient, almost equal tosophisticated base load dual refrigerant processes and fully 30% better than the dual nitrogen expanderprocess. These unique features offer the potential to monetize otherwise stranded natural gas. Innovate UK hasawarded Gasconsult a grant to permit engineering development of the ZR-LNG concept for a coal bed methaneprospect in Botswana. Thereafter it can be considered for the many new LNG projects expected to bedeveloped world-wide in the coming decades.