Oxidatively Stable Membranes for Gas Separations
T2015-267 Carbon dioxide capture from synthesis gas or hydrogen and methane containing mixtures
Industrial processes, such as cement, steel, pulp and paper, chemicals and natural gas processing, are significant emitters of carbon dioxide, which accounts for nearly 25% of energy-related carbon dioxide emissions. The current standard for carbon capture membranes are amine-based, which are susceptible to high energy consumption. Alternate membrane solutions with improved stability are required to make carbon capture a cost effective practice.
Researchers at The Ohio State University, led by Dr. Winston Ho, have developed membranes comprised of quaternaryammonium-based hydroxide and fluoride in small molecular and macromolecular (polymer) forms and cross-linked polyvinylalcohol (PVA) or crosslinked polyvinylalcohol-polysiloxane (PVA-POS). These membranes are oxidatively stable and effective for removal of carbon dioxide and/or hydrogen sulfide for the purification of hydrogen, syngas and natural gas and for CO2 capture from flue gas. In addition, the technology includes the lab-scale and scale-up fabrication, testing, and stability of the oxidatively stable hydroxide- and fluoride-containing membranes.
- Gas separation
- Improved stability
- Cost effective