Georgia Tech Research Corporation (GTRC), and project partners Oak Ridge National Laboratory (ORNL), ReactWell LLC, and Trimeric Inc., are advancing a fiber sorbent technology for direct air capture (DAC) through optimization of a contactor design to enhance productivity and lower cost. Polyethyleneimine (PEI)-infused cellulose acetate (CA)/silica fiber sorbents previously developed for DAC applications are being housed in 3D-printed modules that provide heat integration and flow control for adsorption of carbon dioxide (CO2). The hybridization of fiber sorbent technology with modular housing provides several advantages that lead to lower air pressure drops, higher sorbent productivity, and ease of manufacturing and assembly.