| Title: | Methodology for evaluating the CO2 sequestration capacity of waste ashes |
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| Authors: | ID Tominc, Sara (Author)
ID Ducman, Vilma (Author) |
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| Files: |  URL - Source URL, visit https://www.mdpi.com/1996-1944/16/15/5284
 PDF - Presentation file, download (3,73 MB)
MD5: C666CA872924C0F3BC455FDA40F84120
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| Abstract: | The concentration of CO2 in the atmosphere is constantly increasing, leading to an increase in the average global temperature and, thus, affecting climate change. Hence, various initiatives have been proposed to mitigate this process, among which CO2 sequestration is a technically simple and efficient approach. The spontaneous carbonation of ashes with atmospheric CO2 is very slow, and this is why accelerated carbonation is encouraged. However, not all ashes are equally suitable for this process, so a methodology to evaluate their potential should be developed. Such a methodology involves a combination of techniques, from theoretical calculations to XRF, XRD, DTA-TG, and the calcimetric determination of the CaCO3 content. The present study followed the approach of exposing ashes to accelerated carbonation conditions (4% v/v CO2, 50–55% and 80–85% RH, 20 ◦C) in a closed carbonation chamber for different periods of time until the maximum CO2 uptake is reached. The amount of sequestered CO2 was quantified by thermogravimetry. The results show that the highest CO2 sequestration capacity (33.8%) and carbonation efficiency (67.9%) were obtained for wood biomass bottom ash. This method was applied to eight combustion ashes and could serve to evaluate other ashes or comparable carbon storage materials. |
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| Keywords: | CO2 sequestration, carbonation efficiency, coal ash, wood biomass ash, co-combustion ash, DTA-TG analysis |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 27.07.2023 |
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| Publisher: | Methodology for evaluating the CO2 sequestration capacity of waste ashes |
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| Year of publishing: | 2023 |
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| Number of pages: | str. 1-15 |
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| Numbering: | Vol. 16, iss. 15, [article no.] 5284 |
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| PID: | 20.500.12556/DiRROS-16788  |
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| UDC: | 54 |
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| ISSN on article: | 1996-1944 |
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| DOI: | 10.3390/ma16155284 |
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| COBISS.SI-ID: | 159989251 |
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| Copyright: | © 2023 by the authors.
Licensee MDPI, Basel, Switzerland. |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 28. 7. 2023;
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| Publication date in DiRROS: | 08.08.2023 |
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| Views: | 368 |
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| Downloads: | 155 |
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