Compact Membrane Systems, a pioneer in separations technology, is developing a carbon capture solution for removing dissolved carbon dioxide (CO2) from liquids. In enclosed spaces with large numbers of people exhaling CO2, there is no efficient solution for CO2 removal;

traditional gas phase separation solutions are not efficient in this environment. CMS is working with an Australian organization to pilot a novel membrane liquid-based removal system to remove CO2 for continuous adsorption and capture of CO2.

Why CO2 Removal

With sustainable energy transition in motion, reducing greenhouse gas emissions from existing processes is a near term priority. Wherever there are human beings, carbon dioxide is being produced. This is particularly problematic in enclosed spaces like aircrafts, mines, marine vessels, and enclosed workspaces, where CO2 builds up and lowers air quality, reducing the time the space can be occupied. Due to the low concentration of CO2, a traditional gas phase separation solution is not efficient. However, CO2 can be absorbed into a liquid and removed from there. Hybrid liquid absorption and membrane systems hold promise for carbon capture because they can be scaled to the size of the application and can remove low levels of CO2 to keep enclosed atmospheres at optimal air quality.

Technology and Development

The goal of this product is to enable the use of small, efficient liquid absorption systems to remove CO2 with superior space and operational efficiency. Pressure swing adsorption and other incumbent CO2 removal technologies are not space or weight efficient, nor do they capture the CO2 for safe disposal. Continuously removing CO2 from the liquid avoids waste of the liquid absorbent and ensures maximum CO2 removal from the atmosphere. CMS uses pervaporation membranes to remove dissolved CO2 from liquid absorbers. The fluoropolymer pervaporation membrane is stable to harsh chemistries, making the membrane compatible with most liquid absorbents. The membrane can reduce the dissolved CO2 levels from <1% to single ppm levels in the absorbent liquid. The hybrid membrane liquid absorbent system will the piloted with an Australian organization in early 2022. The system is designed to increase the air quality in enclosed spaces and extend occupation time. The membrane is currently in development at CMS to ensure optimal fluid dynamics and space efficiency. To learn more please visit compactmembrane.com or Hannah Murnen at hmurnen@compactmembrane.com.