Liquified Natural Gas (LNG)

When natural gas cannot be transported in its gaseous state in a pipeline, the gas is converted, through liquefaction, to liquified natural gas (LNG) for transportation by ship or truck.

To convert natural gas to LNG, the gas is first dehydrated using molecular sieve dryers, then cooled by lowering the temperature to approximately -162 oC (-260 oF) using refrigerants.

The liquefaction process requires the natural gas to be free of impurities, including water vapor, hydrogen sulfide and carbon dioxide, prior to conversion from gas to liquid.

Our proven, high-accuracy solutions provide a rapid response to changes in moisture concentration, allowing users to optimize molecular sieve dryer generation on a demand vs. time basis. Built-in verification ensures users can validate or calibrate the analyzers in the field, providing full confidence in the analyzer measurement. Quartz crystal microbalance and tunable diode laser solutions provide accurate, low-level impurity detection to prevent formation of corrosive acids, eliminate freezing during the cryogenic refrigeration process, and maximize the heating content of the natural gas.

  • Application +


    Dryer Efficiency & Breakthrough

    Drying by adsorption involves passing the natural gas over a solid desiccant where the water molecules adsorb onto the desiccant material which is commonly molecular sieve, activated alumina or a silica gel. Moisture measurement at the outlet of the molecular sieve dryer optimizes the regeneration cycle, reduces operational expenses and extends plant uptime.

    Recommended products: 3050-DO, 3050-SLR, 3050-TE

    Feed Gas Quality for LNG Liquefaction

    The purity of the natural gas entering the cryogenic process is critical to prevent freezing or corrosion during refrigeration and maximize the heating content of the natural gas.   Accurate measurements for moisture, H2S and CO2 are required.

    Recommended products: 5100HD, 3050-DO, 3050-SLR, 3050-TE, 933