About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
2026 Graduate Student Poster Contest
|
| Presentation Title |
SPG-31: Particle Molecular Layer Deposition of Amine-Functionalized Multilayers for Direct Air Capture Solid Adsorbents: Investigating Amine Efficiency Within Porous Substrates |
| Author(s) |
Catherine L. Cox, Ana M Singureanu, Jaidyn E Davis, Davis R Conklin, Alan W. Weimer |
| On-Site Speaker (Planned) |
Catherine L. Cox |
| Abstract Scope |
Particle Molecular Layer Deposition (MLD) was used to deposit amine-functionalized multilayer films on porous and nonporous particle substrates for CO2 capture applications. This study investigates the highly conformal growth capabilities of MLD to grow multilayer aminosilane films on the external and internal surfaces of porous particles without increasing CO2 diffusion limitations to available amine sites due to pore blocking. Porous alumina and nonporous zirconia particles were coated first with an atomic layer deposition (ALD) coating of trimethylaluminum (TMA) and water, followed by a (3-aminopropyl)triethoxysilane (APTES) and water MLD coating. Reactions were performed in a fluidized bed reactor where the number of APTES/H2O MLD cycles was varied to study the effects of film thickness on CO2 adsorption and amine efficiency. Elemental analysis, N2 adsorption isotherms, and CO2 adsorption isotherms, were used to quantify film composition, surface characteristics, CO2 adsorption capacity, and amine efficiency of the solid amine adsorbents. |