Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> Capture
In this study, the sorption capacity of limestone samples for CO<sub>2</sub> was investigated to determine the conditions under which they can be used in the high-temperature carbonate loop process. For the work, limestone samples from the Czech Republic were used, which contained a high...
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MDPI AG
2023-03-01
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| author | Veronika Kyselová Lenka Jílková Karel Ciahotný |
| author_facet | Veronika Kyselová Lenka Jílková Karel Ciahotný |
| author_sort | Veronika Kyselová |
| collection | DOAJ |
| description | In this study, the sorption capacity of limestone samples for CO<sub>2</sub> was investigated to determine the conditions under which they can be used in the high-temperature carbonate loop process. For the work, limestone samples from the Czech Republic were used, which contained a high proportion of CaO (more than 97 wt.%). A total of 20 cycles of calcination (950 °C) and subsequent CO<sub>2</sub> sorption–carbonation (650 °C) were performed for each limestone sample tested. The sorption capacity towards CO<sub>2</sub> in the 20th cycle was less than 10% of the value determined in the first carbonation cycle of the samples and the most significant decrease was observed between the first and second cycles. The highest sorption capacity was determined for the Branžovy sample, which captured 268 mL of CO<sub>2</sub>/per 1 g of sorbent by chemisorption. Only 15 mL of carbon dioxide per 1 g of sorbent was bound by physisorption. However, in repeated use, the Vitošov limestone had the highest sorption capacity for CO<sub>2</sub>. For all samples, the amount of carbon dioxide bound by physisorption was in the range of 4 to 10% of the amount bound by chemisorption. Due to sintering of the material, the BET specific surface area decreased by 95 to 96%. |
| first_indexed | 2024-03-11T05:07:08Z |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T05:07:08Z |
| publishDate | 2023-03-01 |
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| spelling | doaj.art-8bd58858b621498f954e75c89fc2170e2023-11-17T18:50:18ZengMDPI AGCrystals2073-43522023-03-0113455910.3390/cryst13040559Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> CaptureVeronika Kyselová0Lenka Jílková1Karel Ciahotný2Department of Gaseous and Solid Fuels and Air Protection, University of Chemistry and Technology Prague, 166 28 Prague, Czech RepublicDepartment of Gaseous and Solid Fuels and Air Protection, University of Chemistry and Technology Prague, 166 28 Prague, Czech RepublicDepartment of Gaseous and Solid Fuels and Air Protection, University of Chemistry and Technology Prague, 166 28 Prague, Czech RepublicIn this study, the sorption capacity of limestone samples for CO<sub>2</sub> was investigated to determine the conditions under which they can be used in the high-temperature carbonate loop process. For the work, limestone samples from the Czech Republic were used, which contained a high proportion of CaO (more than 97 wt.%). A total of 20 cycles of calcination (950 °C) and subsequent CO<sub>2</sub> sorption–carbonation (650 °C) were performed for each limestone sample tested. The sorption capacity towards CO<sub>2</sub> in the 20th cycle was less than 10% of the value determined in the first carbonation cycle of the samples and the most significant decrease was observed between the first and second cycles. The highest sorption capacity was determined for the Branžovy sample, which captured 268 mL of CO<sub>2</sub>/per 1 g of sorbent by chemisorption. Only 15 mL of carbon dioxide per 1 g of sorbent was bound by physisorption. However, in repeated use, the Vitošov limestone had the highest sorption capacity for CO<sub>2</sub>. For all samples, the amount of carbon dioxide bound by physisorption was in the range of 4 to 10% of the amount bound by chemisorption. Due to sintering of the material, the BET specific surface area decreased by 95 to 96%.https://www.mdpi.com/2073-4352/13/4/559limestonehigh-temperature sorptionCO<sub>2</sub> captureCCS technologychemisorptionphysisorption |
| spellingShingle | Veronika Kyselová Lenka Jílková Karel Ciahotný Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> Capture Crystals limestone high-temperature sorption CO<sub>2</sub> capture CCS technology chemisorption physisorption |
| title | Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> Capture |
| title_full | Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> Capture |
| title_fullStr | Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> Capture |
| title_full_unstemmed | Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> Capture |
| title_short | Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO<sub>2</sub> Capture |
| title_sort | decrease in the adsorption capacity of adsorbents in the high temperature carbonate loop process for co sub 2 sub capture |
| topic | limestone high-temperature sorption CO<sub>2</sub> capture CCS technology chemisorption physisorption |
| url | https://www.mdpi.com/2073-4352/13/4/559 |
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