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Liquefaction Process Technologies for LNG Production



## There’re 4 Liquefaction Process Technologies for LNG Production:-



#01.  C3MR APCI (Air Products) Process.
 

#02.  Cascade (ConocoPhillips) Process:


* 1- The raw gas is first treated to remove (CO2), (H2S) and other sulfur compounds, (H2O), organometallic mercury compounds, particulates, and other contaminates before it is routed to the liquefaction section of the plant.

*2- The treated gas is then chilled and condensed to approximately -162°C in successively colder heat exchanges, using pure propane (or propylene), ethylene, and methane as refrigerants.

*3- The refrigerant circuits are designed with 2 drivers/compressors for each refrigerant which provides a wide range of turn down capacity and a high degree of availability. For the propane cycle core-in-kettle type exchanges are used. Brazed aluminium plate-fin exchanges (cold boxes) are applied mainly in the ethylene and methane cycles. All the cooling, with exception of the propane chilling, takes place in the 2 cold boxes.

*4- The LNG product is then pumped into storage tanks where it remains until shipment. Boil-off gas and ship return vapors are captured and recycled through the Optimized Cascade process for efficient re‑liquefaction.

#03.  Shell DMR Process.

 

#04.  Linde Process.




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