We have tested many gases and gas mixtures with a CO₂ content of between 0.04 (air) and 100 vol. % ( pure gas) with our process technology. Among other things, we have investigated the effectiveness of separation using gas scrubbers and membrane reactors and the purity of the CO₂ released. The following real-life gas feed streams were examined: Air, flue gas from the cement industry, from engine combustion, as well as from heating systems, furthermore digester gas and biogas, brewery gases, as well as fermentation gas from alcoholic fermentation. A complete separation of CO₂ from the source gas can be reliably ensured by adapting the membrane contactor unit. In particular, the use of individualized membrane contactors has proven to be very advantageous. It has been shown that with the use of membrane contactors the acceptor medium can be protected in particular from the entry of solids, such as soot or sand, or salts, e.g. NaCl, or from microbial contamination.

We were also able to document that some of the treated process gases are available in high-purity form immediately after extraction of CO₂. For example, a high-purity methane gas (> 98.5 vol.%) could be obtained after digester gas/biogas treatment. Furthermore, pure CO gas could be obtained after treatment of a synthesis gas mixture (CO/CO₂).