Ventilation integration of direct air capture systems for the efficient separation of CO2 from air

DACS Talk by Dominik Heß (KIT IMVT)

Meeting-ID: 632 1001 7805, Kenncode: 608827

Language: English

Direct Air Capture is a technology with which CO2 can be separated from the air in order to generate negative emissions or carbon-containing products. In order to make the energy-intensive process more efficient, such systems could be integrated into existing building ventilation systems in the future. The behaviour of a DAC module in a ventilation system was researched in detailed simulations and its optimum operating parameters were determined. For this purpose, an analytical model of a low-temperature DAC was created and integrated into a flowsheet simulation that maps the remaining components of the infrastructure. The resulting synergies and a possible technical implementation will be explained in this presentation. In addition, a novel purely electrical version of DAC based on amino acids will be presented and characterized on the basis of initial experimental results. In contrast to low-temperature DAC, which relies on a solid filter material, the innovative process uses a special liquid that can efficiently and selectively absorb CO2 from the air. In a new type of membrane process, electrodialysis, the dissolved CO2 can be recovered electrically as a pure substance. The suitability of such a system for separating CO2 from room air is explained in this presentation.

The DACS talk series is organized and hosted by the DACStorE research consortium. If you wish to learn more about their ongoing research you may visit their website at the link below:

To contact the organizers or ask for further information, write an email at: dacstore-info@fz-juelich.de