High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization
The Zn-Al mixed metal oxide (ZnAl-MMO) with a plate-like structure was derived from Zn-Al layered double hydroxide. The ZnAl-MMO with a Zn/Al molar ratio of 3:1 exhibits superior absorption ability for H2S in a simulated coal gas at 600 ℃ due to the special structure of the ZnAl-MMO. Besides ZnS, el...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140692 |
| _version_ | 1826117370666549248 |
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| author | Wu, Mengmeng Chang, Bingwei Lim, Teik-Thye Oh, Wen-Da Lei, Junxi Mi, Jie |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Wu, Mengmeng Chang, Bingwei Lim, Teik-Thye Oh, Wen-Da Lei, Junxi Mi, Jie |
| author_sort | Wu, Mengmeng |
| collection | NTU |
| description | The Zn-Al mixed metal oxide (ZnAl-MMO) with a plate-like structure was derived from Zn-Al layered double hydroxide. The ZnAl-MMO with a Zn/Al molar ratio of 3:1 exhibits superior absorption ability for H2S in a simulated coal gas at 600 ℃ due to the special structure of the ZnAl-MMO. Besides ZnS, elemental sulfur is also produced during the desulfurization process. The deactivation model could well simulate the absorption behavior of H2S. The sulfidation reaction over the sorbent shows large initial reaction rate constants (1110-5390 m3 min-1 kg-1) and low activation energy (29.5 kJ mol-1). The regeneration rate of the used sorbent can reach 99.8% under the optimum conditions. The regenerated sorbents still show high sulfur capacity (ca. 30%), implying its great application potential for industrial-scale desulfurization of the hot coal gas. |
| first_indexed | 2024-10-01T04:26:12Z |
| format | Journal Article |
| id | ntu-10356/140692 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:26:12Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1406922020-06-01T07:34:49Z High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization Wu, Mengmeng Chang, Bingwei Lim, Teik-Thye Oh, Wen-Da Lei, Junxi Mi, Jie School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering::Environmental engineering H2S Desulfurization The Zn-Al mixed metal oxide (ZnAl-MMO) with a plate-like structure was derived from Zn-Al layered double hydroxide. The ZnAl-MMO with a Zn/Al molar ratio of 3:1 exhibits superior absorption ability for H2S in a simulated coal gas at 600 ℃ due to the special structure of the ZnAl-MMO. Besides ZnS, elemental sulfur is also produced during the desulfurization process. The deactivation model could well simulate the absorption behavior of H2S. The sulfidation reaction over the sorbent shows large initial reaction rate constants (1110-5390 m3 min-1 kg-1) and low activation energy (29.5 kJ mol-1). The regeneration rate of the used sorbent can reach 99.8% under the optimum conditions. The regenerated sorbents still show high sulfur capacity (ca. 30%), implying its great application potential for industrial-scale desulfurization of the hot coal gas. 2020-06-01T07:34:49Z 2020-06-01T07:34:49Z 2018 Journal Article Wu, M., Chang, B., Lim, T.-T., Oh, W.-D., Lei, J., & Mi, J. (2018). High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization. Journal of Hazardous Materials, 360, 391-401. doi:10.1016/j.jhazmat.2018.08.015 0304-3894 https://hdl.handle.net/10356/140692 10.1016/j.jhazmat.2018.08.015 30130697 2-s2.0-85051670441 360 391 401 en Journal of Hazardous Materials © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering H2S Desulfurization Wu, Mengmeng Chang, Bingwei Lim, Teik-Thye Oh, Wen-Da Lei, Junxi Mi, Jie High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization |
| title | High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization |
| title_full | High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization |
| title_fullStr | High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization |
| title_full_unstemmed | High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization |
| title_short | High-sulfur capacity and regenerable Zn-based sorbents derived from layered double hydroxide for hot coal gas desulfurization |
| title_sort | high sulfur capacity and regenerable zn based sorbents derived from layered double hydroxide for hot coal gas desulfurization |
| topic | Engineering::Environmental engineering H2S Desulfurization |
| url | https://hdl.handle.net/10356/140692 |
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