Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal
The wetting properties of ALES (Ammonium lauryl ether sulfate), SLES (sodium lauryl ether sulfate), TD (dodecyl triethanolamine salfate) and SDS (sodium dodecyl sulfate) solutions and their adsorption capacities on coal dust surface were evaluated by surface tension, contact angle, sink time, wettin...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/169071 |
| _version_ | 1826109873643847680 |
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| author | Gan, Jian Wang, Deming Xiao, Zhongmin Wang, Ya-nan Zhang, Kang Zhu, Xiaolong. Li, Shuailong |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Gan, Jian Wang, Deming Xiao, Zhongmin Wang, Ya-nan Zhang, Kang Zhu, Xiaolong. Li, Shuailong |
| author_sort | Gan, Jian |
| collection | NTU |
| description | The wetting properties of ALES (Ammonium lauryl ether sulfate), SLES (sodium lauryl ether sulfate), TD (dodecyl triethanolamine salfate) and SDS (sodium dodecyl sulfate) solutions and their adsorption capacities on coal dust surface were evaluated by surface tension, contact angle, sink time, wetting rate, and changes in the micromorphology and functional groups on coal surface. The results showed that the four surfactants share similar adhesion and spreading wettability, while they differ notably in immersion wetting. A water-surfactant-low rank coal (LRC) system was established using Materials Studio software and the Wender coal model; then quantum chemical calculations and molecular dynamics (MD) simulations were conducted. The results showed that ALES is of the widest relative concentration distribution range (25.25–60 Å), the largest overlap range (25 Å) and the largest diffusion coefficient (D = 0.318); NH4+ can easily penetrate the surfactant layer, which proves the strong modification ability of ALES to LRC. ALES/LRC/H2O has the lowest interaction energy and the most H-bonds, indicating that ALES is of a strong adsorption capacity. Based on the experimental data and simulation results, the integrated wettabilities of the four surfactants follow ALES＞SLES＞TD＞SDS, partially contributed by the hydrolytic cations and EO groups. |
| first_indexed | 2024-10-01T02:25:14Z |
| format | Journal Article |
| id | ntu-10356/169071 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:25:14Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1690712023-06-28T03:14:20Z Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal Gan, Jian Wang, Deming Xiao, Zhongmin Wang, Ya-nan Zhang, Kang Zhu, Xiaolong. Li, Shuailong School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Coal Dust Molecular Dynamics The wetting properties of ALES (Ammonium lauryl ether sulfate), SLES (sodium lauryl ether sulfate), TD (dodecyl triethanolamine salfate) and SDS (sodium dodecyl sulfate) solutions and their adsorption capacities on coal dust surface were evaluated by surface tension, contact angle, sink time, wetting rate, and changes in the micromorphology and functional groups on coal surface. The results showed that the four surfactants share similar adhesion and spreading wettability, while they differ notably in immersion wetting. A water-surfactant-low rank coal (LRC) system was established using Materials Studio software and the Wender coal model; then quantum chemical calculations and molecular dynamics (MD) simulations were conducted. The results showed that ALES is of the widest relative concentration distribution range (25.25–60 Å), the largest overlap range (25 Å) and the largest diffusion coefficient (D = 0.318); NH4+ can easily penetrate the surfactant layer, which proves the strong modification ability of ALES to LRC. ALES/LRC/H2O has the lowest interaction energy and the most H-bonds, indicating that ALES is of a strong adsorption capacity. Based on the experimental data and simulation results, the integrated wettabilities of the four surfactants follow ALES＞SLES＞TD＞SDS, partially contributed by the hydrolytic cations and EO groups. This project was supported by the Key Program of the National Natural Science Foundation of China (Grant No. 52130411), the National Natural Science Foundation of China (Grant No. 51974299), and the Fundamental Research Funds for the Central Universities (2020CXNL10). Jian Gan was supported by the China Scholarship Council (Grant No. 202006420018). 2023-06-28T03:14:19Z 2023-06-28T03:14:19Z 2023 Journal Article Gan, J., Wang, D., Xiao, Z., Wang, Y., Zhang, K., Zhu, X. & Li, S. (2023). Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal. Energy, 271, 127012-. https://dx.doi.org/10.1016/j.energy.2023.127012 0360-5442 https://hdl.handle.net/10356/169071 10.1016/j.energy.2023.127012 2-s2.0-85149216462 271 127012 en Energy © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Coal Dust Molecular Dynamics Gan, Jian Wang, Deming Xiao, Zhongmin Wang, Ya-nan Zhang, Kang Zhu, Xiaolong. Li, Shuailong Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal |
| title | Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal |
| title_full | Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal |
| title_fullStr | Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal |
| title_full_unstemmed | Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal |
| title_short | Experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low-rank coal |
| title_sort | experimental and molecular dynamics investigations of the effects of ionic surfactants on the wettability of low rank coal |
| topic | Engineering::Mechanical engineering Coal Dust Molecular Dynamics |
| url | https://hdl.handle.net/10356/169071 |
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