Membrane Separation of CO2 from Syngas Using PDMS and Mixed Matrix Membranes

Membrane Separation of CO₂ from Syngas Using PDMS and Mixed Matrix Membranes 

Carbon dioxide (CO₂), being one of the leading global greenhouse gas emissions, can be important to remove from other gaseous components in downstream processing. In processes such as gasification or dry CH₄ reforming, CO₂ along with syngas (CO and H₂) are the primary products. In order for syngas to be used in other processes, such conversion into methanol or ammonia, these components must be separated. Polymeric membranes have been proven to selectively separate CO₂ over syngas, due to the favoured transport mechanism. Along with these materials, mixed matrix membranes are also proving to be novelty separation methods, combining the adsorption and membrane separation mechanisms to further improve their performances. In this study, commercial pure PDMS membranes, along with PDMS mixed matrix membranes including activated carbon and zeolites were investigated for CO₂ removal from syngas.