With LBG (Liquefied BioGas) we achieve the same climate improvements as with compressed biogas (CBG). The advantage is that the biogas in liquid form at ~ -160 degrees Celsius has a much higher energy density and thus larger amounts of energy can be refueled in trucks that can reach up to 160 miles on one tank.
The liquid biogas is stored in a large cryogenic tank that can almost be compared to an perfect thermos where a vacuum between tank layers insulates the cooled methane gas with minimal heating as a result. The small heating that nevertheless takes place can be actively cooled down with even colder liquid nitrogen gas. Or even better, the evaporation to gaseous form can be used directly to enable refueling of compressed vehicle gas.
Refueling of LBG takes place via a dispenser that can deliver the liquid biogas according to the respective truck manufacturer’s technology choice. In addition to the direct LBG refueling, the station can also advantageously serve as a CBG back-up or via a decompression unit supply a nearby industry with biogas.
