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Full text release has been delayed at the author's request until June 01, 2027

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UNRAVELING THE REACTION PATHWAYS OF ADSORBED IONIC CO2 SPECIES ON AMINE SORBENTS AND NON-THERMAL PLASMA DEPOLYMERIZATION UNDER AMBIENT CONDITIONS WITH IN-SITU SPECTROSCOPY

Oduntan, Aderinsola Oluwayemisi
http://orcid.org/0009-0001-0206-2171
http://rave.ohiolink.edu/etdc/view?acc_num=akron1717077645756902

Abstract Details

, Doctor of Philosophy, University of Akron, Chemical Engineering.
Carbon capture and plastic waste upcycling are both effective strategies for combatting climate change by reducing CO2 emissions in the atmosphere. Carbon capture technology is characterized by three major methods: (i) post combustion capture (ii) pre-combustion and (iii) oxy-combustion. CO2 absorption, which is a type of post-combustion technology, is reported to be the dominant capture technology. The overall performance of this process is majorly determined by parameters such as CO2 capture capacity, amine efficiency and binding energy. A key issue of the CO2 absorption process is the development of a sorbent that will effectively absorb CO2 in a stream of flue gas and then release it in such a way that the sorbent is not thermally degraded, clean, and ready for re-use. The release of the captured CO2 typically involves the use of elevated temperatures for regeneration of the sorbent which leads to high energy penalty, solvent loss, corrosion, and high operation costs. This research focuses on the application of an in-situ infrared spectroscopic (IR) approach to study the structure of adsorbed CO2 species and reaction mechanism during CO2-amine reactions under pure CO2 and direct air capture cycles as a method of developing cost-effective and energy efficient sorbents. The band assignments of these species are identified by HCl probing. In addition, we explore alternative routes for regeneration that involve the coupling of renewable energy in the form of electricity to generate non thermal plasma with in-situ infrared (IR) spectroscopy to separate adsorbed CO2 from novel developed polyamine sorbents. We explored the reaction mechanism of non-thermal plasma induced reaction for the release of adsorbed CO2 from solid amine sorbents packed in a glass cylindrical tube reactor. The lead vs lag relationship of released CO2 and other products are investigated and characterized. Furthermore, we apply the concept of plasma-enabled gas-phase electrocatalysis for an efficient conversion of polymer wastes to value-added chemicals. We evaluate the possibility of the production of monomers and olefins from polymer wastes at ambient temperature by an electrolysis reaction pathway. Energy efficiency, productivity and selectivity are investigated under three main conditions which are air, pure CO2 and N2.
Steven Chuang (Advisor)
Mesfin Tsige (Committee Member)
Lu-Kwang Ju (Committee Member)
Linxiao Chen (Committee Member)
Qixin Zhou (Committee Member)
175 p.
Chemical Engineering; Climate Change; Energy; Sustainability
carbon capture, polymer recycling

Recommended Citations

Citations

  • Oduntan, A. O. (2024). UNRAVELING THE REACTION PATHWAYS OF ADSORBED IONIC CO2 SPECIES ON AMINE SORBENTS AND NON-THERMAL PLASMA DEPOLYMERIZATION UNDER AMBIENT CONDITIONS WITH IN-SITU SPECTROSCOPY [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1717077645756902

    APA Style (7th edition)

  • Oduntan, Aderinsola. UNRAVELING THE REACTION PATHWAYS OF ADSORBED IONIC CO2 SPECIES ON AMINE SORBENTS AND NON-THERMAL PLASMA DEPOLYMERIZATION UNDER AMBIENT CONDITIONS WITH IN-SITU SPECTROSCOPY. 2024. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1717077645756902.

    MLA Style (8th edition)

  • Oduntan, Aderinsola. "UNRAVELING THE REACTION PATHWAYS OF ADSORBED IONIC CO2 SPECIES ON AMINE SORBENTS AND NON-THERMAL PLASMA DEPOLYMERIZATION UNDER AMBIENT CONDITIONS WITH IN-SITU SPECTROSCOPY." Doctoral dissertation, University of Akron, 2024. http://rave.ohiolink.edu/etdc/view?acc_num=akron1717077645756902

    Chicago Manual of Style (17th edition)

akron1717077645756902
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This open access ETD is published by University of Akron and OhioLINK.