(618f) Demonstration of Engineered Structured Sorbents in Various Adsorption Applications
AIChE Annual Meeting
2021 Annual Meeting
Structured Adsorbents: Beyond Pellets and Beads
Wednesday, November 10, 2021 - 8:45am to 9:00am
For aerospace (e.g., NASA) and building applications, these structured sorbents were implemented to remove CO2 and trace contaminants from breathing air. For NASA, these systems must efficiently and reliably control CO2 and trace contaminant concentrations to levels necessary for long-term crewed space exploration missions beyond low earth orbit. For building applications (e.g., Indoor Air Quality - IAQ or sick-building syndromes), these systems must be capable of providing a long operational window for removing the targeted components. Sorbents such as Zeolites and molecular sieves are excellent candidates for these applications because of their high affinity for capturing molecules of interest along with their chemically inert nature and non-flammable properties. Such properties make them attractive from both performance and safety perspectives. Finally, for fuel cell applications, this MicrolithÂ®-based adsorption technology has been implemented for efficient hydrogen sulfide (H2S) removal from the fuel processor exhaust stream in a fuel reforming-fuel cell system. Our results indicated a significant improvement in performance compared to typical commercial ZnO pellets.
In this paper, the design, development, and optimization of engineered structured sorbent beds based on PCIâs MicrolithÂ® adsorption technology will be presented. Test results that demonstrate its benefits of increased structural stability gained by eliminating clay bound zeolite pellets that tend to fluidize and erode, and better thermal control during sorption leading to increased process efficiency will be highlighted. We will also discuss the results obtained from various sorption tests, such as removing CO2 and trace organic contaminants for NASA cabin air cleaning applications and for IAQ applications. Additionally, the development of this technology for sulfur (e.g., H2S) removal in fuel cell applications will be presented.