Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidation
Removing hydrogen sulfide (H2S) via the selective oxidation has been considered an effective way to further purify the indusial sulfur-containing due to it can completely transform residual H2S into elemental sulfur. While N-doped porous carbon was applied to H2S selective oxidation, a sustainable m...
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KeAi Communications Co., Ltd.
2024-12-01
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| Series: | Green Energy & Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468025724000165 |
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| author | Xu Liu Liang Shan Xiaoxue Sun Tianxin Wang Zhongqing Liu Yuefeng Liu |
| author_facet | Xu Liu Liang Shan Xiaoxue Sun Tianxin Wang Zhongqing Liu Yuefeng Liu |
| author_sort | Xu Liu |
| collection | DOAJ |
| description | Removing hydrogen sulfide (H2S) via the selective oxidation has been considered an effective way to further purify the indusial sulfur-containing due to it can completely transform residual H2S into elemental sulfur. While N-doped porous carbon was applied to H2S selective oxidation, a sustainable methodology for the synthesis of efficient and stable N-doped carbon catalysts remains a difficulty, limiting its future development in large-scale applications. Herein, we present porous, honeycomb-like N-doped carbon catalysts with large specific surface areas, high pyridinic N content, and numerous structural defects for H2S selective oxidation prepared using reusable NaCl as the template. The as-prepared NC-10-800 catalyst exhibits excellent catalytic performance (sulfur formation rate of 784 gsulfur kgcat.−1 h−1), outstanding stability (> 100 h), and excellent anti-water vapor, anti-CO2 and anti-oxidation properties, suggesting significant potential for practical industrial application. The characterization results and kinetic study demonstrate that the large surface areas and structural defects created by the molten salt at high temperature enhance the exposure of pyridinic N sites and thus accelerate the catalytic activity. Importantly, the water-soluble NaCl template could be easily washed from the carbon nanomaterials, and thus the downstream salt-containing wastewater could be subsequently reused for the dissolution of carbon precursors. This environment-friendly, low-cost, reusable salt-template strategy has significant implications for the development of N-doped carbon catalysts for practical applications. |
| format | Article |
| id | doaj-art-56c46685d1e740028a12853278653424 |
| institution | Kabale University |
| issn | 2468-0257 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Green Energy & Environment |
| spelling | doaj-art-56c46685d1e740028a128532786534242024-11-20T05:07:29ZengKeAi Communications Co., Ltd.Green Energy & Environment2468-02572024-12-0191218661877Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidationXu Liu0Liang Shan1Xiaoxue Sun2Tianxin Wang3Zhongqing Liu4Yuefeng Liu5College of Chemical Engineering, Sichuan University, Chengdu, 610065, China; Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, ChinaDalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China; College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, ChinaDalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, ChinaDalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, ChinaCollege of Chemical Engineering, Sichuan University, Chengdu, 610065, China; Corresponding authors.Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China; Corresponding authors.Removing hydrogen sulfide (H2S) via the selective oxidation has been considered an effective way to further purify the indusial sulfur-containing due to it can completely transform residual H2S into elemental sulfur. While N-doped porous carbon was applied to H2S selective oxidation, a sustainable methodology for the synthesis of efficient and stable N-doped carbon catalysts remains a difficulty, limiting its future development in large-scale applications. Herein, we present porous, honeycomb-like N-doped carbon catalysts with large specific surface areas, high pyridinic N content, and numerous structural defects for H2S selective oxidation prepared using reusable NaCl as the template. The as-prepared NC-10-800 catalyst exhibits excellent catalytic performance (sulfur formation rate of 784 gsulfur kgcat.−1 h−1), outstanding stability (> 100 h), and excellent anti-water vapor, anti-CO2 and anti-oxidation properties, suggesting significant potential for practical industrial application. The characterization results and kinetic study demonstrate that the large surface areas and structural defects created by the molten salt at high temperature enhance the exposure of pyridinic N sites and thus accelerate the catalytic activity. Importantly, the water-soluble NaCl template could be easily washed from the carbon nanomaterials, and thus the downstream salt-containing wastewater could be subsequently reused for the dissolution of carbon precursors. This environment-friendly, low-cost, reusable salt-template strategy has significant implications for the development of N-doped carbon catalysts for practical applications.http://www.sciencedirect.com/science/article/pii/S2468025724000165H2S selective oxidationNitrogen-doped carbonReusable salt-templateGreen synthesisPorous carbon nanomaterials |
| spellingShingle | Xu Liu Liang Shan Xiaoxue Sun Tianxin Wang Zhongqing Liu Yuefeng Liu Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidation Green Energy & Environment H2S selective oxidation Nitrogen-doped carbon Reusable salt-template Green synthesis Porous carbon nanomaterials |
| title | Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidation |
| title_full | Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidation |
| title_fullStr | Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidation |
| title_full_unstemmed | Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidation |
| title_short | Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H2S selective oxidation |
| title_sort | reusable salt template strategy for synthesis of porous nitrogen rich carbon boosts h2s selective oxidation |
| topic | H2S selective oxidation Nitrogen-doped carbon Reusable salt-template Green synthesis Porous carbon nanomaterials |
| url | http://www.sciencedirect.com/science/article/pii/S2468025724000165 |
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