Gas separation

Gas mixtures can be separated by different types of membranes. In comparison to the cryogenic methods for gas separation, membranes offer higher gas selectivities and are more energy-efficient. For hydrogen separation we have developed Pd-coated alumina capillary membranes. If the operating temperature is high, dense perovskite capillaries can be implemented in the process e.g. for oxygen separation from air, CO2 capture and storage or catalytic reactions such as syngas production. A new research field of our group is the development of membrane-supported ionic liquids for CO and CO2 separation e.g. from biogas.

Our research

Perovskite oxygen-conducting capillary membranes

During the past few years mixed conductive perovskites have increasingly come into focus as membrane materials for the selective separation of oxygen from air-gas mixtures.

Dense metal membranes for hydrogen purification

Membranes for the separation of hydrogen from other gases.

Supported ionic liquid membranes

Due to their unique chemical and thermal properties ionic liquids are used as absorbers and in supported liquid membranes for the separation of gases, like CO2.

Reference projects

MAVO MEGA – Functional membranes for save and energy efficient gas separation

 

So far, the industrial use of technical separation membranes has been largely set to liquid filtration and less to gas separation. In the MEGA project, mixed‑matrix membranes were developed at the Fraunhofer IGB in cooperation with three other Fraunhofer institutes, which have great potential for gas separation due to their improved separation properties compared to pure polymer coatings.