(535e) A New Temperature Swing Adsorption Configuration for High Purity and Recovery CO2 Capture From Flue Gas With Increased Throughput

Tethered amine materials have great potential for CO₂ capture by temperature swing adsorption because of their high CO₂/N₂ selectivity and large heats of adsorption (> 90KJ/mol) which correspond to highly temperature-dependent adsorption isotherms.  Tethered amines also have a lower theoretical regeneration energy than aqueous amine solutions because the heat capacity of their solid substrates is lower than that of the water in an amine solution.  The major drawback of TSA in industrial applications is the length of time required to heat and cool the large adsorbent beds which can be several hours or even days.  We have developed a new TSA configuration which does not rely on external heat transfer and therefore can be run at high throughput, thereby reducing capital costs.  Furthermore, the separation can be performed using a narrow temperature range at relatively low temperatures (90⁰C to 150⁰C), utilizing low quality steam for a reduced energy penalty. We performed numerical simulations of our configuration and achieved high purity CO₂ product with high recovery from flue gas.