Keywords and Phrases
3D printed monoliths; Adsorbents; CO2 capture; Hybrid adsorbents; Metal-organic frameworks; Zeolites
"Global climate change due to the increasing CO2 concentration in the atmosphere is primarily associated with anthropogenic CO2 emissions. CO2 capture technologies using adsorbents have not been implemented commercially due to lack of scalable, practical and cost-effective strategies and are still under development. Moreover, the use of conventional configurations such as pellets and beads for the removal of CO2 from enclosed environments have been shown to impose limitations to the removal efficiency and system performance. In this dissertation, engineering of advanced and efficient structured adsorbents for practical and scalable CO2 capture technologies and their use in CO2 removal from enclosed environments and flue gas streams are reported.
Additive manufacturing (3D printing) technique in fabrication of adsorbents have not been explored. Herein, various adsorbents such as zeolites, aminosilicas and metal-organic frameworks (MOFs) have been formulated in monolithic form using 3D printing technique. In order to yield a robust structure with high adsorbent capacity, the composition and printing conditions were optimized accordingly. After characterizing the structural and physical properties of 3D-printed monolithic adsorbents, their equilibrium and dynamic CO2 adsorption performance were evaluated by various techniques. This investigation has shown that 3D printing technique offers an alternative, cost-effective and facile approach to fabricate monolithic adsorbents with tunable structural, physical and mechanical properties.
In addition to the 3D-printed monoliths, several cost-effective zeolite-based adsorbents were synthesized from abundant and inexpensive kaolin clay. To enhance the adsorption capacity, the materials were then impregnated with aminopolymer and evaluated for CO2 capture from air"--Abstract, page iv.
Rownaghi, Ali A.
Ludlow, Douglas K.
Chemical and Biochemical Engineering
Ph. D. in Chemical Engineering
United States. National Aeronautics and Space Administration
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- 3D-printed zeolite monoliths for CO2 removal from enclosed environments
- Formulation of aminosilica adsorbents into 3D-printed monoliths and evaluation of their CO2 capture performance
- 3D-printed metal-organic framework monoliths for gas adsorption processes
- CO2 capture from air using amine functionalized kaolin-based zeolites
xiii, 126 pages
© 2017 Harshul Vipul Thakkar, All rights reserved.
Dissertation - Open Access
Electronic OCLC #
Thakkar, Harshul, "Engineering advanced adsorbent materials for CO₂ capture applications" (2017). Doctoral Dissertations. 2751.