Amine scrubbing

This process is based on reverse chemical absorption of CO2 at low pressure. CO2 is absorbed in the absorption column with the use of amine-based liquid (solvent). The captured CO2 is separated and subsequently regenerated by heating in the separator column. Recovery of the sorbent is carried out by steam at a temperature of up to over 100°C. The original solvents are then recovered from the intermediates and the reverse chemical reaction returns the CO2 back to the gaseous phase.

A special composition of amines is an essential element of this process. Methane affects global warming more than 21 times stronger than CO2, making this biogas upgrading system the most sustainable in terms of methane emissions, which are the lowest.

Characteristics of the amine scrubbing process

  • lowest methane emissions: no waste gas treatment necessary
  • lowest methane loss (<0.1%): highest demonstrated methane recovery
  • highest methane content: lowest propane addition
  • lowest electricity consumption: no CO2 compression
  • low maintenance costs
    possibility of recovery of CO2 from waste gases
  • high availability and reliability thanks to proven design and experience
  • possibility of heat recovery
  • easy modification of the system in case of change in the input biogas flow rate


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