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DIRECT CO2 SEQUESTRATION ONTO ALKALINE MODIFIED OIL SHALE FLY ASH
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
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2014 (English)In: Gorûcie slancy, ISSN 0208-189X, E-ISSN 1736-7492, Vol. 31, no 1, 79-90 p.Article in journal (Refereed) Published
Abstract [en]

The present study focuses on the direct chemical adsorption of CO2 onto alkaline hydrothermally activated oil shale fly ash (OSFA). The CO2 chemisorption experiments were conducted in a high-pressure reactor at a temperature of 150 degrees C and CO2 partial pressure of 100 bar during a 24-hour period. Original, activated and chemisorbed OSFA samples were characterized by means of X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) coupled with energy-dispersive X-ray spectroscopy (EDS), specific surface area (BETN2) and high-resolution Si-29 magic angle spinning nuclear magnetic resonance (MAS-NMR). The results indicated moderate weight increase (max 5 wt%) and according to XRD and MAS-NMR analysis tobermorites had reacted with CO2, leading to calcite formation. The results also show that the alkaline hydrothermally activated OSFA has a potential to be used in industrial processes for direct chemical adsorption of CO2 from flue gases.

Place, publisher, year, edition, pages
2014. Vol. 31, no 1, 79-90 p.
Keyword [en]
tobermorites, direct CO2 sequestration, oil shale fly ash
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-88297DOI: 10.3176/oil.2014.1.08ISI: 000333225900008OAI: oai:DiVA.org:umu-88297DiVA: diva2:716117
Available from: 2014-05-08 Created: 2014-04-29 Last updated: 2017-12-05Bibliographically approved

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Ritamäki, JohannesBoström, DanLarsson, WilliamKordas, KrisztianMikkola, Jyri-Pekka
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Department of Applied Physics and ElectronicsDepartment of Chemistry
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Gorûcie slancy
Chemical Sciences

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CiteExportLink to record
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