Boil Off Gas (BOG) – Definition and Pronunciation
What is BOG?
BOG (Boil Off Gas) is the small amounts of LNG that boil off from LNG storage tanks in LNG plant operations and are recovered, or during transportation. BOG gas on LNG tankers can be used as a fuel to drive the ships.
Examples of BOG
BOG is drawn from the vapour suction of each tank by compressors and reliquefied using the reliquefaction plant. The reliqueified LNG is returned to cargo tanks (maintaining tank levels within operational limits) through the condensate return line to the bottom of each tank.
From “Managing Laden Voyages – BOG Management and Propulsion Systems for LNG Carriers”.
For the purpose of methane release mitigation, more than aspects related to the operation, it is important to focus on BOG management as a key driver to mitigate the risk of methane emissions to the atmosphere.
From “Balancing Cleaner Fuel and Environmental Impact in LNG Emissions”.
This will depend on many aspects which are mostly local-dependent and whether the LNG distribution system has the ability to manage BOG generated during transfer.
From “LNG IMO Tanks/Containment Systems”.
Pronunciation of BOG
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