Effect of Steam on Carbonation of CaO in Ca-Looping
Ca-looping is an effective way to capture CO<sub>2</sub> from coal-fired power plants. However, there are still issues that require further study. One of these issues is the effect of steam on the Ca-looping process. In this paper, a self-madethermogravimetric analyzer that can achieve r...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-06-01
|
| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/28/13/4910 |
| _version_ | 1827734805493579776 |
|---|---|
| author | Ruzhan Bai Na Li Quansheng Liu Shenna Chen Qi Liu Xing Zhou |
| author_facet | Ruzhan Bai Na Li Quansheng Liu Shenna Chen Qi Liu Xing Zhou |
| author_sort | Ruzhan Bai |
| collection | DOAJ |
| description | Ca-looping is an effective way to capture CO<sub>2</sub> from coal-fired power plants. However, there are still issues that require further study. One of these issues is the effect of steam on the Ca-looping process. In this paper, a self-madethermogravimetric analyzer that can achieve rapid heating and cooling is used to measure the change of sample weight under constant temperature conditions. The parameters of the Ca-looping are studied in detail, including the addition of water vapor alone in the calcination or carbonation stage and the calcination/carbonation reaction temperatures for both calcination and carbonation stages with water vapor. Steam has a positive overall effect on CO<sub>2</sub> capture in the Ca-looping process. When steam is present in both calcination and carbonation processes, it increases the decomposition rate of CaCO<sub>3</sub> and enhances the subsequent carbonation conversion of CaO. However, when steam was present only in the calcination process, there was lower CaO carbonation conversion in the following carbonation process. In contrast, when steam was present in the carbonation stage, CO<sub>2</sub> capture was improved. Sample characterizations after the reaction showed that although water vapor had a negative effect on the pore structure, adding water vapor increased the diffusion coefficient of CO<sub>2</sub> and the carbonation conversion rate of CaO. |
| first_indexed | 2024-03-11T01:34:36Z |
| format | Article |
| id | doaj.art-d898ab284aaa46198799b9fab939b05e |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T01:34:36Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-d898ab284aaa46198799b9fab939b05e2023-11-18T17:05:18ZengMDPI AGMolecules1420-30492023-06-012813491010.3390/molecules28134910Effect of Steam on Carbonation of CaO in Ca-LoopingRuzhan Bai0Na Li1Quansheng Liu2Shenna Chen3Qi Liu4Xing Zhou5College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, ChinaCollege of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, ChinaCollege of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, ChinaHebei Key Laboratory of Inorganic Nanomaterials, School of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaHebei Key Laboratory of Inorganic Nanomaterials, School of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, ChinaCa-looping is an effective way to capture CO<sub>2</sub> from coal-fired power plants. However, there are still issues that require further study. One of these issues is the effect of steam on the Ca-looping process. In this paper, a self-madethermogravimetric analyzer that can achieve rapid heating and cooling is used to measure the change of sample weight under constant temperature conditions. The parameters of the Ca-looping are studied in detail, including the addition of water vapor alone in the calcination or carbonation stage and the calcination/carbonation reaction temperatures for both calcination and carbonation stages with water vapor. Steam has a positive overall effect on CO<sub>2</sub> capture in the Ca-looping process. When steam is present in both calcination and carbonation processes, it increases the decomposition rate of CaCO<sub>3</sub> and enhances the subsequent carbonation conversion of CaO. However, when steam was present only in the calcination process, there was lower CaO carbonation conversion in the following carbonation process. In contrast, when steam was present in the carbonation stage, CO<sub>2</sub> capture was improved. Sample characterizations after the reaction showed that although water vapor had a negative effect on the pore structure, adding water vapor increased the diffusion coefficient of CO<sub>2</sub> and the carbonation conversion rate of CaO.https://www.mdpi.com/1420-3049/28/13/4910Ca-loopingsteamcarbonation conversioncatalysis |
| spellingShingle | Ruzhan Bai Na Li Quansheng Liu Shenna Chen Qi Liu Xing Zhou Effect of Steam on Carbonation of CaO in Ca-Looping Molecules Ca-looping steam carbonation conversion catalysis |
| title | Effect of Steam on Carbonation of CaO in Ca-Looping |
| title_full | Effect of Steam on Carbonation of CaO in Ca-Looping |
| title_fullStr | Effect of Steam on Carbonation of CaO in Ca-Looping |
| title_full_unstemmed | Effect of Steam on Carbonation of CaO in Ca-Looping |
| title_short | Effect of Steam on Carbonation of CaO in Ca-Looping |
| title_sort | effect of steam on carbonation of cao in ca looping |
| topic | Ca-looping steam carbonation conversion catalysis |
| url | https://www.mdpi.com/1420-3049/28/13/4910 |
| work_keys_str_mv | AT ruzhanbai effectofsteamoncarbonationofcaoincalooping AT nali effectofsteamoncarbonationofcaoincalooping AT quanshengliu effectofsteamoncarbonationofcaoincalooping AT shennachen effectofsteamoncarbonationofcaoincalooping AT qiliu effectofsteamoncarbonationofcaoincalooping AT xingzhou effectofsteamoncarbonationofcaoincalooping |