Metal–Organic Frameworks (MOFs) Containing Adsorbents for Carbon Capture

Linda Ansone-Bertina, Viesturs Ozols, Lauris Arbidans, Linda Dobkevica, Kristaps Sarsuns, Edgars Vanags and Maris Klavins
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Linda Ansone-Bertina: Department of Environmental Science, University of Latvia, LV-1004 Riga, Latvia
Viesturs Ozols: Department of Environmental Science, University of Latvia, LV-1004 Riga, Latvia
Lauris Arbidans: Department of Environmental Science, University of Latvia, LV-1004 Riga, Latvia
Linda Dobkevica: Department of Environmental Science, University of Latvia, LV-1004 Riga, Latvia
Kristaps Sarsuns: Laboratory of Molecular Crystals, Faculty of Chemistry, University of Latvia, LV-1004 Riga, Latvia
Edgars Vanags: Laboratory of Materials Morphology and Structure Investigations, Institute of Solid State Physics, University of Latvia, LV-1063 Riga, Latvia
Maris Klavins: Department of Environmental Science, University of Latvia, LV-1004 Riga, Latvia

Energies, 2022, vol. 15, issue 9, 1-33

Abstract: In this study, new composite materials of montmorillonite, biochar, or aerosil, containing metal–organic frameworks (MOF) were synthesized in situ. Overall, three different MOFs—CuBTC, UTSA-16, and UiO-66-BTEC—were used. Obtained adsorbents were characterized using powder X-ray diffraction, thermogravimetric analysis, nitrogen adsorption porosimetry, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectrophotometry. Additionally, the content of metallic and nonmetallic elements was determined to investigate the crystalline structure, surface morphology, thermal stability of the obtained MOF-composites, etc. Cyclic CO 2 adsorption analysis was performed using the thermogravimetric approach, modeling adsorption from flue gasses. In our study, the addition of aerosil to CuBTC (CuBTC-A-15) enhanced the sorbed CO 2 amount by 90.2% and the addition of biochar (CuBTC-BC-5) increased adsorbed the CO 2 amount by 75.5% in comparison to pristine CuBTC obtained in this study. Moreover, the addition of montmorillonite (CuBTC-Mt-15) increased the adsorbed amount of CO 2 by 27%. CuBTC-A-15 and CuBTC-BC-5 are considered to be the most perspective adsorbents, capturing 3.7 mmol/g CO 2 and showing good stability after 20 adsorption-desorption cycles.

Keywords: MOF; carbon capture; MOF-composites; montmorillonite; biochar; CuBTC; UTSA-16; UiO-66-BTEC; analytical characterization; desorption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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