Graduate Thesis Or Dissertation
 

CO₂ capture from wet flue gas using a water-stable and cost-effective metal-organic framework

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/w6634c44c

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  • We report the use of MIL-120 as a water-stable and cost-effective metal-organic framework (MOF) for selectively capturing CO₂ from wet flue gas. Synthesized using inexpensive and environmentally benign reagents in water, MIL-120 possesses one-dimensional pores decorated with hydroxyl-bridged Al(III) ions and benzene rings with an interstitial spacing of 4.78 Å. Carbon dioxide isotherms show steep uptake at low pressure, and the affinity of MIL-120 for CO₂ is 44 kJ mol-1. CO₂-loading 13C solid-state nuclear magnetic resonance and Fourier transform infrared spectra tracking the sorption of CO₂ into MIL-120 revealed that the interplay of pore size, functionality, and dimensionality is vital for CO₂ restriction within the pores of MIL-120. Breakthrough experiments reveal that MIL-120 can capture CO₂ from dry and wet flue gas with uptake capacities of 1.215 and 1.118 mmol g-1, respectively. Our work highlights the synthetic benefits of MIL-120 and elucidates its selective capture of CO₂ from wet flue gas.
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  • Open-Access article forming the basis of this thesis
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