Parameter
Potential Technology
Mercury (Hg)
CVAAS
Moisture (H₂O)
Fabry perot-interferometer
Oxygen (O₂)
Paramagnetic / Zirconia
Mercury in Liquid LNG
CVAAS
Mercury in LNG
CVAAS
Density / Concentration
Acoustic
Hydrocarbon Leak
Optical Oil-on-Water
Density / Composition
Process GC
Methane Concentration
NDIR
Parameter
Mercury (Hg)
Moisture (H₂O)
Oxygen (O₂)
Potential Technology
CVAAS
Fabry perot-interferometer
Paramagnetic / Zirconia
Parameter
Mercury in LNG
Density / Composition
Moisture
Potential Technology
CVAAS
GC
Fabry perot-interferometer
Parameter
Mercury (Hg)
Moisture
Methane Concentration
Potential Technology
CVAAS
Fabry perot-interferometer
NDIR
Parameter
Mercury (Hg)
Moisture
Oxygen (O₂)
Potential Technology
CVAAS
Fabry perot-interferometer
Paramagnetic
Description
Following liquefaction, LNG is transferred to cryogenic storage tanks designed to safely contain the liquid at extremely low temperatures while minimizing heat ingress. During storage, a small fraction of LNG naturally evaporates as boil-off gas, which is collected and either reliquefied, routed back into the process, or utilized as fuel to maintain stable tank pressure and system efficiency. For export, LNG is pumped from storage tanks to marine or truck loading facilities using dedicated transfer pumps and insulated pipelines. Loading arms and unloading systems enable controlled transfer between the terminal and LNG carriers while ensuring accurate custody transfer measurement. Vapour return lines recover displaced gases during loading and unloading, maintaining pressure balance and reducing emissions.
LNG is then transported by specialized cryogenic carriers to receiving terminals or satellite facilities, where it can be stored, redistributed, or directed to regasification and end-use applications. This storage and transportation stage forms a critical link between LNG production and downstream distribution within the midstream value chain.