(618c) Analysis of Direct Air Capture Process Conditions on Adsorptive Performance of 3D-Printed Aminosilica Monoliths
AIChE Annual Meeting
2021
2021 Annual Meeting
Separations Division
Structured Adsorbents: Beyond Pellets and Beads
Wednesday, November 10, 2021 - 8:15am to 8:30am
Direct air capture (DAC) is a promising negative carbon technology to extract CO2 directly from atmosphere. While various sorbent materials have been developed for DAC, they are yet to be tested under realistic process conditions. In our earlier work, we have developed structured sorbents via additive manufacturing and demonstrated their efficacy in selective removal of CO2 from air. In this present work, we performed a thorough analysis of process performance of 3D-pronted structures comprising of amine-grafted silica monoliths. In particular, 3D printed mesoporous silica monoliths with cell densities of 200, 400, and 600 cpsi graphed with 30 wt% 3-aminopropylsilyl (APS) and tested under temperature swing adsorption (TSA) with various flowrate, desorption temperatures, and feed conditions.1 The effect of these TSA conditions on several performance metrics including CO2 purity and recovery, throughput and mass and heat transfer characteristics were investigated systematically to develop a baseline for 3D-printed adsorbent contactors that will be used in DAC processes. Lastly, the energy cost of the TSA system was calculated to provide a cost analysis of the TSA system and the potential scale-up cost of the primary amines DAC adsorbent.