The Need

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.

The Technology

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.

Commercial Applications

• Engineering
• Environmental
• Gas separation

Benefits/ Advantages

• Improved stability
• Cost effective