Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant
Flotation strongly depends on bubble–particle attachment interactions. However, modelling of bubble–particle attachment interactions is challenging particularly due to the difficulties in quantifying the hydrophobic interactions between an air bubble and a non-spherical particle using a well-advance...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/73833 |
| _version_ | 1848763110500859904 |
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| author | Wang, S. Albijanic, Boris Tao, X. Fan, H. |
| author_facet | Wang, S. Albijanic, Boris Tao, X. Fan, H. |
| author_sort | Wang, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Flotation strongly depends on bubble–particle attachment interactions. However, modelling of bubble–particle attachment interactions is challenging particularly due to the difficulties in quantifying the hydrophobic interactions between an air bubble and a non-spherical particle using a well-advanced technique such as atomic force microscopy; the reason is that these measurements are not reproducible when particles are non-spherical. This paper proposes a methodology to determine the hydrophobic interaction constants between air bubbles and coal particles in the presence of a surfactant. The bubble–particle hydrophobic constants were determined from first principles using the Navier-Stokes equation and the Glembotsky experimental technique. It was found that the higher the surfactant concentration, the higher the hydrophobic constants. The results showed that the calculated critical film rupture thickness is inversely related to the induction time measurements, and the maximum critical film rupture thickness matched the minimum induction time. The decrease in the electrostatic double layer repulsive energies resulted in the decrease in the induction times. |
| first_indexed | 2025-11-14T10:58:15Z |
| format | Journal Article |
| id | curtin-20.500.11937-73833 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:58:15Z |
| publishDate | 2019 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-738332019-08-13T01:32:16Z Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant Wang, S. Albijanic, Boris Tao, X. Fan, H. Flotation strongly depends on bubble–particle attachment interactions. However, modelling of bubble–particle attachment interactions is challenging particularly due to the difficulties in quantifying the hydrophobic interactions between an air bubble and a non-spherical particle using a well-advanced technique such as atomic force microscopy; the reason is that these measurements are not reproducible when particles are non-spherical. This paper proposes a methodology to determine the hydrophobic interaction constants between air bubbles and coal particles in the presence of a surfactant. The bubble–particle hydrophobic constants were determined from first principles using the Navier-Stokes equation and the Glembotsky experimental technique. It was found that the higher the surfactant concentration, the higher the hydrophobic constants. The results showed that the calculated critical film rupture thickness is inversely related to the induction time measurements, and the maximum critical film rupture thickness matched the minimum induction time. The decrease in the electrostatic double layer repulsive energies resulted in the decrease in the induction times. 2019 Journal Article http://hdl.handle.net/20.500.11937/73833 10.1016/j.fuproc.2018.12.016 Elsevier restricted |
| spellingShingle | Wang, S. Albijanic, Boris Tao, X. Fan, H. Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant |
| title | Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant |
| title_full | Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant |
| title_fullStr | Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant |
| title_full_unstemmed | Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant |
| title_short | Thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant |
| title_sort | thin liquid film drainage mechanism between air bubbles and low-rank coal particles in the presence of surfactant |
| url | http://hdl.handle.net/20.500.11937/73833 |