LNG Plants


Liquefied Natural Gas (LNG) is a colorless and nontoxic gas that is produced when natural gas (predominantly Methane CH4) is refrigerated to temperatures around – 260°F (-162°C). Natural gas is liquefied for ease of storage and transportation to remote places where pipelines are not available. LNG occupies a volume 600 times less than the natural gas in gaseous state. To ensure a successful liquefaction process, the natural gas is pre-treated to remove CO2, H2S, and H2O and is then refrigerated to the liquefaction temperature and is ready to store and/or transport.

Refrigeration by MCR

The Micro Carbon Residue (MCR) cycle is designed to minimize compression power and is optimized by using a specific refrigerant mixture for a customized plant design. This refrigerant mixture can be compressed to meet the refrigeration requirements.

Our CRYOSYS company has developed a proprietary MCR process which is contained in a perlite filled Cold-Box. This Cold-Box includes the main MCR exchanger, a brazed aluminum heat exchanger for optimal heat transfer, and the flash separation vessels.

This design also incorporates a secondary LNG containment vessel in the unexpected event of an internal leak. The CRYOSYS  Cold-Box design is best in class due to the very tight approach temperature and the brazed design which serves to minimize required MR compression.


Comparison Between LNG and other Fuels
BTU per Gallon 139,000 82,644 91,000
Gallon per MMBTU 7.19 12.10 10.99
Ignition Temperature (F) 437 1004 842
Relative Energy Density 1.68 1.00 1.10
Boiling Point (F) 370+ -260 -44
Leaks & Spills puddles vaporizes gathers in low areas
LNG Conversions

1 LNG Gallon = 82.6 Standard cubic feet of Natural Gas
1 LNG Gallon = 82,644 Btu
1,000,000 Btu / 82,644 Btu per gallon = 12.1 LNG gallons per MMBtu
10,000 Gallons = 826 MCF
1 LNG Tonne = 2,200 lbs / 3.5 = 621 LNG gallons per LNG tonne
1 LNG Road Tanker = 9,500 LNG gallons = 33,670 lbs of LNG = 785 MCF
1.68 Gallons of LNG = 1 Gallon of Diesel (on energy equivalents)
1 LNG Gallon Weighs = 3.5 lbs
Typical LNG Composition = 97mol% C1, 1.5% C2