Capture of CO2 by vermiculite impregnated with CaO
Vermiculite samples were impregnated with different amounts of calcium oxide by the conventional thermal heating technique and subject to CO2 capture experiments in thermal analysis equipment. The amount of CO2 captured by calcium oxide increased from 13 g of CO2 per mol of CaO to 16.8 g of CO2 per...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-01-01
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| Series: | Carbon Management |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/17583004.2021.2023050 |
| _version_ | 1797678395521236992 |
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| author | Matheus Henrique Simplício Pereira Cláudio Gouvêa dos Santos Geraldo Magela de Lima Carlos Giovani Oliveira Bruziquesi Victor de Alvarenga Oliveira |
| author_facet | Matheus Henrique Simplício Pereira Cláudio Gouvêa dos Santos Geraldo Magela de Lima Carlos Giovani Oliveira Bruziquesi Victor de Alvarenga Oliveira |
| author_sort | Matheus Henrique Simplício Pereira |
| collection | DOAJ |
| description | Vermiculite samples were impregnated with different amounts of calcium oxide by the conventional thermal heating technique and subject to CO2 capture experiments in thermal analysis equipment. The amount of CO2 captured by calcium oxide increased from 13 g of CO2 per mol of CaO to 16.8 g of CO2 per mol of CaO when the experiments were carried out with pure calcium oxide and vermiculite impregnated with CaO (1:1), respectively. Integral isoconversional methods of Kissinger-Akahira-Sunose (KAS) and Osawa-Flynn-Wall (OFW) were used for the kinetic study of the process and good correlation coefficients were achieved. The apparent activation energy values showed that for low conversions (α < 0.3) the controlling step of the process is a mixed step where the chemical reaction and the diffusion of the reagents into the vermiculite have rates of the same order of magnitude (20 kJ < Ea < 40 kJ). For higher conversions values (α > 0.3) the apparent activation energy values suggest that the slow step is a chemical step (Ea> 40 kJ). |
| first_indexed | 2024-03-11T22:59:06Z |
| format | Article |
| id | doaj.art-f8d829461be74a17ae8149ab4bcd5c20 |
| institution | Directory Open Access Journal |
| issn | 1758-3004 1758-3012 |
| language | English |
| last_indexed | 2024-03-11T22:59:06Z |
| publishDate | 2022-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Carbon Management |
| spelling | doaj.art-f8d829461be74a17ae8149ab4bcd5c202023-09-21T15:09:07ZengTaylor & Francis GroupCarbon Management1758-30041758-30122022-01-0113111712610.1080/17583004.2021.20230502023050Capture of CO2 by vermiculite impregnated with CaOMatheus Henrique Simplício Pereira0Cláudio Gouvêa dos Santos1Geraldo Magela de Lima2Carlos Giovani Oliveira Bruziquesi3Victor de Alvarenga Oliveira4Thermal Analysis and Non-Ferrous Extractive Metallurgy Laboratory, Department of Metallurgical and Materials Engineering, Universidade Federal de Ouro PretoPolymer Analyses Laboratory, Department of Chemistry, Universidade Federal de Ouro PretoCoordination Chemistry Laboratory, Department of Chemistry, Universidade Federal de Minas GeraisHeterogeneous Catalysis Laboratory, Department of Chemistry, Universidade Federal de Minas GeraisThermal Analysis and Non-Ferrous Extractive Metallurgy Laboratory, Department of Metallurgical and Materials Engineering, Universidade Federal de Ouro PretoVermiculite samples were impregnated with different amounts of calcium oxide by the conventional thermal heating technique and subject to CO2 capture experiments in thermal analysis equipment. The amount of CO2 captured by calcium oxide increased from 13 g of CO2 per mol of CaO to 16.8 g of CO2 per mol of CaO when the experiments were carried out with pure calcium oxide and vermiculite impregnated with CaO (1:1), respectively. Integral isoconversional methods of Kissinger-Akahira-Sunose (KAS) and Osawa-Flynn-Wall (OFW) were used for the kinetic study of the process and good correlation coefficients were achieved. The apparent activation energy values showed that for low conversions (α < 0.3) the controlling step of the process is a mixed step where the chemical reaction and the diffusion of the reagents into the vermiculite have rates of the same order of magnitude (20 kJ < Ea < 40 kJ). For higher conversions values (α > 0.3) the apparent activation energy values suggest that the slow step is a chemical step (Ea> 40 kJ).http://dx.doi.org/10.1080/17583004.2021.2023050co2 capturevermiculitecalcium oxideisoconversional methodkinetics |
| spellingShingle | Matheus Henrique Simplício Pereira Cláudio Gouvêa dos Santos Geraldo Magela de Lima Carlos Giovani Oliveira Bruziquesi Victor de Alvarenga Oliveira Capture of CO2 by vermiculite impregnated with CaO Carbon Management co2 capture vermiculite calcium oxide isoconversional method kinetics |
| title | Capture of CO2 by vermiculite impregnated with CaO |
| title_full | Capture of CO2 by vermiculite impregnated with CaO |
| title_fullStr | Capture of CO2 by vermiculite impregnated with CaO |
| title_full_unstemmed | Capture of CO2 by vermiculite impregnated with CaO |
| title_short | Capture of CO2 by vermiculite impregnated with CaO |
| title_sort | capture of co2 by vermiculite impregnated with cao |
| topic | co2 capture vermiculite calcium oxide isoconversional method kinetics |
| url | http://dx.doi.org/10.1080/17583004.2021.2023050 |
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