Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solution
Abstract The reaction between carbonic acid and montmorillonite minerals was studied in order to provide a theoretical basis for analyzing changes in the physical properties of coal seams after CO2 injection and for optimizing CO2 pumping parameters. A single montmorillonite mineral of purity >90...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2014-08-01
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| Series: | International Journal of Coal Science & Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40789-014-0005-6 |
| _version_ | 1797276146177409024 |
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| author | Xiaoming Ni Quanzhong Li Wenxue Chen |
| author_facet | Xiaoming Ni Quanzhong Li Wenxue Chen |
| author_sort | Xiaoming Ni |
| collection | DOAJ |
| description | Abstract The reaction between carbonic acid and montmorillonite minerals was studied in order to provide a theoretical basis for analyzing changes in the physical properties of coal seams after CO2 injection and for optimizing CO2 pumping parameters. A single montmorillonite mineral of purity >90 % was selected and subjected to reactions at 25, 35, and 45 °C in carbonic acid solutions of varying acidity. The Si and Al concentrations in the solutions and the structure and elemental compositions of the montmorillonite before and after the reactions were analyzed using a spectrophotometer, an X-ray diffractometer, and an energy-dispersive X-ray spectrometer; kinetic reaction models were established for the dissolution of Si and Al in carbonic acid solutions in order to estimate the apparent activation energy of Si dissolution under different acidity conditions. The results indicate that Al dissolved rapidly and soon reached solubility equilibrium. On the other hand, Si concentration in the solutions increased rapidly and then gradually declined with vibrations, with maximum values at 25, 35, and 45 °C, which were observed at approximately 96, 72, and 48 h, respectively. In addition, Si dissolution fitted the diffusion-controlled reaction model well; as the pH value decreased, the apparent activation energy of Si dissolution decreased, and Si became easier to dissolve. Furthermore, it was concluded that as a weak acid, carbonic acid causes little damage to the mineral structure of montmorillonite. |
| first_indexed | 2024-03-07T15:24:08Z |
| format | Article |
| id | doaj.art-b205561a8e2e473fb50d1030d29962b6 |
| institution | Directory Open Access Journal |
| issn | 2095-8293 2198-7823 |
| language | English |
| last_indexed | 2024-03-07T15:24:08Z |
| publishDate | 2014-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj.art-b205561a8e2e473fb50d1030d29962b62024-03-05T17:25:43ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232014-08-0111313810.1007/s40789-014-0005-6Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solutionXiaoming Ni0Quanzhong Li1Wenxue Chen2State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic UniversitySchool of Energy Science and Engineering, Henan Polytechnic UniversitySchool of Civil Engineering, Henan Polytechnic UniversityAbstract The reaction between carbonic acid and montmorillonite minerals was studied in order to provide a theoretical basis for analyzing changes in the physical properties of coal seams after CO2 injection and for optimizing CO2 pumping parameters. A single montmorillonite mineral of purity >90 % was selected and subjected to reactions at 25, 35, and 45 °C in carbonic acid solutions of varying acidity. The Si and Al concentrations in the solutions and the structure and elemental compositions of the montmorillonite before and after the reactions were analyzed using a spectrophotometer, an X-ray diffractometer, and an energy-dispersive X-ray spectrometer; kinetic reaction models were established for the dissolution of Si and Al in carbonic acid solutions in order to estimate the apparent activation energy of Si dissolution under different acidity conditions. The results indicate that Al dissolved rapidly and soon reached solubility equilibrium. On the other hand, Si concentration in the solutions increased rapidly and then gradually declined with vibrations, with maximum values at 25, 35, and 45 °C, which were observed at approximately 96, 72, and 48 h, respectively. In addition, Si dissolution fitted the diffusion-controlled reaction model well; as the pH value decreased, the apparent activation energy of Si dissolution decreased, and Si became easier to dissolve. Furthermore, it was concluded that as a weak acid, carbonic acid causes little damage to the mineral structure of montmorillonite.https://doi.org/10.1007/s40789-014-0005-6MontmorilloniteCarbonic acid solutionDissolution of Si and AlReaction kinetics |
| spellingShingle | Xiaoming Ni Quanzhong Li Wenxue Chen Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solution International Journal of Coal Science & Technology Montmorillonite Carbonic acid solution Dissolution of Si and Al Reaction kinetics |
| title | Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solution |
| title_full | Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solution |
| title_fullStr | Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solution |
| title_full_unstemmed | Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solution |
| title_short | Dissolution kinetics of Si and Al from montmorillonite in carbonic acid solution |
| title_sort | dissolution kinetics of si and al from montmorillonite in carbonic acid solution |
| topic | Montmorillonite Carbonic acid solution Dissolution of Si and Al Reaction kinetics |
| url | https://doi.org/10.1007/s40789-014-0005-6 |
| work_keys_str_mv | AT xiaomingni dissolutionkineticsofsiandalfrommontmorilloniteincarbonicacidsolution AT quanzhongli dissolutionkineticsofsiandalfrommontmorilloniteincarbonicacidsolution AT wenxuechen dissolutionkineticsofsiandalfrommontmorilloniteincarbonicacidsolution |