Knowledge Base

The process of CO₂ recovery starts by capturing CO₂ from its source stream, either the off-gas from biogas upgrading or the flue gas from biomass combustion, before it can escape the atmosphere. For biogas plants, this typically happens as a direct output of the membrane-based upgrading process, which separates methane from CO₂ to produce biomethane, leaving a concentrated CO₂ stream behind. For combustion plants, HoSt’s carbon capture technology is integrated with the flue gas path of the boiler or CHP plant to capture CO₂ before it is released through the stack. In both cases, the recovered CO₂ is then purified to remove trace impurities and moisture, after which it can be used as a gaseous product, permanently stored, or passed on to a CO₂ liquefaction system, such as the technology HoSt offers through its daughter company Bright Renewables, to be converted into liquid CO₂ for storage, transport, and sale.