Rapid Temperature Swing Adsorption Using Polymer/Supported Amine Composite Hollow Fibers
Project No.: DE-FE0007804
Georgia Tech Research Corporation is developing, fabricating, and testing a novel supported amine carbon dioxide (CO2) capture module at the bench scale. The module consists of hollow fibers loaded with supported adsorbents specifically adapted for the purpose of CO2 capture. Two key innovations are embodied in the design: (1) the fiber is highly loaded with the solid adsorbent to facilitate large CO2 adsorption capacities – this enables a fiber bed to have the high sorbent loadings necessary to capture the CO2, but negates the high pressure drops normally associated with traditional packed and fluidized beds; and (2) the inclusion of an impermeable layer in the fiber's interior allows for cooling during adsorption and heating during desorption. These two innovations support the concept of rapid temperature swing adsorption (RTSA), reducing capital costs by allowing for fast cycling, and reducing operating costs and parasitic loads through heat integration of the adsorption step with preheating the boiler feed water.
Georgia Tech Research Corporation is also developing a computational model of the fiber module and validating it in parallel with the experimental program. This enables fiber and module optimization studies to be performed to support design and scale up and to understand the sensitivity of the module to adsorbent performance, flue gas velocities, and cooling and heating water flow rates. A techno-economic evaluation of the CO2 capture system is also being performed.
Sorption (top) and desorption (bottom) modes in hollow fiber sorbents
(click to enlarge)