Bio-LNG

Bio-LNG is upgraded biomethane that has been liquefied. It is the form used when a pipeline is not there and the gas still has to move: a virtual pipeline, a remote offtaker, or a fuel customer who takes liquid methane.

The chain is digester, sulfide removal, upgrading, then liquefaction and storage. Each step has its own energy use and its own loss. The upgrade ahead of liquefaction is a membrane, an amine scrubber, or hydrogen biomethanisation. A cascade stops at 65 percent methane and is not this feed. The Sumatra note uses biological methanation with renewable hydrogen before liquefaction.

See biomethane upgrading, solar PV and battery storage, and the Sumatra bio-LNG case study.