Product Description

CO2 Pre-Cooling Skid © Cryotec Anlagenbau GmbH

In the process of biogas upgrading, CO2 is usually separated from the biomethane and vented to the atmosphere along with a fraction of the biomethane, the so-called methane slip. The economics of biogas upgrading can be improved, if this CO2 off gas is turned into a product through our CO2 liquefaction and purification units. Through our well-proven technology, the CO2 is first compressed, then dried and cleaned using activated carbon before being liquefied and fine-purified again. In the process, all methane residues are separated from the CO2 along with the other impurities in the raw gas. The methane-rich off gas of the process can be fed back to the fermenter so that the methane slip can be completely avoided and all biomethane can be sold as a product. CO2 is a valuable feedstock in industries such as food & beverage, greenhouses and construction. If you don’t already have a CO2 offtake partner contact us to see, if we can arrange an offtake structure for you.

Technical Data


Hofstetter and its partner companies have deployed over a dozen plants for CO2 utilization around the globe, of which many can be visited on demand.

contact us now!

Interested in what we offer? We're looking forward to answer your questions and present you with a free and individual quote.

Plus d'information

Mehr Information

More Information

Biogas Flares

Keep your biogas plant safe.

Biogas Upgrading

Make the best possible use of your biogas.

Biogas Cogeneration Systems

Turn your biogas into heat & electricity.