Membranes
Membranes are used to separate CO2 from other gases (gas separation membranes) and to allow CO2 to be absorbed from a gas stream into a solvent (membrane gas absorption ).
Membrane gas absorption
In membrane gas absorption a membrane separates the feed gas from the liquid solvent. The CO2 is absorbed into the solvent via pores in the membrane, while the other gases are not. The CO2 can then be removed from the solvent as described in the section on solvent absorption.
The trials aim to:
- Test a range of membrane materials with a range of solvents.
- Evaluate the performance of each configuration.
Gas separation membranes
CO2 can selectively pass through gas separation membranes, to be removed from the feed gas.
The trials aim to:
- Test a number of gas separation membrane strategies (for example, removing H2 first, then the CO2 second ).
- Investigate the influence syngas and minor gas components have on membrane performance and plasticization.
- Investigate the separation performance of a number of molecular sieving membranes at high temperatures.
These membranes separate gases based on their size. They are particularly suited for use when the process includes a water gas shift reaction which will maximise CO2 capture.
