Engineering advanced adsorbent materials for CO₂ capture applications

<p>"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.</p><p>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.</p><p>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.</p>

Name thesis:degree_name

Ph. D. in Chemical Engineering

Grantor

Missouri University of Science and Technology

Author dc:creator

• Thakkar, Harshul

• 3D printed monoliths
• Adsorbents
• CO2 capture
• Hybrid adsorbents
• Metal-organic frameworks
• Zeolites
• Chemical Engineering

Repository record dc:identifier

https://scholarsmine.mst.edu/doctoral_dissertations/2751

OAI identifier oai:identifier

oai:scholarsmine.mst.edu:doctoral_dissertations-3756