(381ad) Direct Air Capture of CO2 Using Zeolites for the Production of High Purity CO2

Direct Air Capture (DAC) of CO₂ has been an emerging field with studies originally investigating the use of NaOH solutions to absorb CO₂ as a means to reduce greenhouse gas emissions. However, in this field, there has yet to be a thorough investigation into using zeolites for DAC of CO₂ even though industry currently uses them in a similar process in air pre-purification. This presentation will include an experimental study of CO₂ capturefrom ambient air using vacuum temperature swing adsorption (VTSA) as a means to capture and effectively reduce the amount of CO₂ in the atmosphere in cold countries like Canada and concentrate it to 95% for sequestration. Another application of this process is for the production of high purity CO₂. Different grades of high purity CO₂ offers higher value as the purity of the CO₂ increases. Examples of different grades of CO₂ include medical, bone dry, food and beverage, anaerobic and laser, supercritical fluid, and research grade. An initial screening study was done on commercially available zeolites and breakthrough experiments have been used to determine the feasibility of the production of high purity CO₂ using the VTSA process.