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CO2 Capture: New Direct Air Capture Unit at ZBT’s Hydrogen Test Field

Demonstrating a power-to-gas process chain including various technologies such as photovoltaic, electrolyser, methanation and direct air capture


direct air caption unit

Already in operation: direct air caption plant at our Hydrogen Test Field

ZBT has expanded the plant park at its hydrogen test field with a Direct Air Capture Unit (DAC) for CO2 Capture. The plant has been recently commissioned and is now fully operational. It has been designed, built and provided by the Finnish company Soletair Power, which manufactures solutions for carbon capture directly from the air.

The Direct Air Capture Unit at ZBT is operated as part of the PtG-MSE project, which ZBT is carrying out together with RWTH Aachen University and YNCORIS GmbH & Co. KG. The motivation in this project is to demonstrate a power-to-gas process chain at the ZBT site. This includes the construction and operation of various plant technologies such as photovoltaic, electrolyser, methanation and direct air capture.

DAC technology plays an important role in the project to provide the amount of CO2 needed to operate the methanation plant. The objective is to achieve a closed carbon cycle at that point by using renewable energy to run the plants. In addition, ZBT takes a great interest in operating and testing one of few direct air capture units in Germany in order to proceed in this field of research.

The modular carbon dioxide capture unit at ZBT removes up to 21 kg/day of CO2₂ from the air, and compresses it to above 10 bar at >98% purity. The unit is housed in a 12 m × 2.4 m × 2.87 m container. This plant uses weak base anion resin as the adsorbent for CO₂ capture.

If you are interested in learning more about power-to-gas technologies and the use case of direct air capture, you are cordially invited to our Power-to-Gas Workshop on 28 September 2022.

Department Fuels and Processes

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