Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability
CO<sub>2</sub> capture from the flue gas is a promising approach to mitigate global warming. However, regulating the carbon-based adsorbent in terms of textural and surface modification is still a challenge. To overcome this issue, the present study depicts the development of cost-effect...
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2025-01-01
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| author | Jiawei Shao Yingyi Wang Mingyang Che Ya Liu Yongfu Jiang Qiang Xiao Muslum Demir Linlin Wang Xin Hu |
| author_facet | Jiawei Shao Yingyi Wang Mingyang Che Ya Liu Yongfu Jiang Qiang Xiao Muslum Demir Linlin Wang Xin Hu |
| author_sort | Jiawei Shao |
| collection | DOAJ |
| description | CO<sub>2</sub> capture from the flue gas is a promising approach to mitigate global warming. However, regulating the carbon-based adsorbent in terms of textural and surface modification is still a challenge. To overcome this issue, the present study depicts the development of cost-effective and high-performance CO<sub>2</sub> adsorbents derived from petroleum coke, an industrial by-product, using a two-step process involving thiourea modification and KOH activation. A series of N,S-codoped porous carbons was synthesized by varying activation temperatures and KOH quantity. The optimized sample exhibited a high specific surface area of 1088 m<sup>2</sup>/g, a narrow micropore volume of 0.52 cm<sup>3</sup>/g, and considerable heteroatom doping (1.57 at.% nitrogen and 0.19 at.% sulfur). The as-prepared adsorbent achieved a CO<sub>2</sub> adsorption capacity of 3.69 and 5.08 mmol/g at 1 bar, 25 °C and 0 °C, respectively, along with a CO<sub>2</sub>/N<sub>2</sub> selectivity of 17. Adsorption kinetics showed 90% of equilibrium uptake was achieved within 5 min, while cyclic studies revealed excellent stability with 97% capacity retention after five cycles. Thermodynamic analysis indicated moderate isosteric heat of adsorption (<i>Q<sub>st</sub></i>) values ranging from 18 to 47 kJ/mol, ensuring both strong adsorption and efficient desorption. These findings highlight the potential of petroleum coke-derived porous carbons for sustainable and efficient CO<sub>2</sub> capture applications. |
| format | Article |
| id | doaj-art-58922987a3fc436aa4fa148a46730f9e |
| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Molecules |
| spelling | doaj-art-58922987a3fc436aa4fa148a46730f9e2025-01-24T13:44:00ZengMDPI AGMolecules1420-30492025-01-0130242610.3390/molecules30020426Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and StabilityJiawei Shao0Yingyi Wang1Mingyang Che2Ya Liu3Yongfu Jiang4Qiang Xiao5Muslum Demir6Linlin Wang7Xin Hu8Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, ChinaInstitute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, ChinaDepartment of Chemical Engineering, Bogazici University, 34342 Istanbul, TürkiyeKey Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology and Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, ChinaCO<sub>2</sub> capture from the flue gas is a promising approach to mitigate global warming. However, regulating the carbon-based adsorbent in terms of textural and surface modification is still a challenge. To overcome this issue, the present study depicts the development of cost-effective and high-performance CO<sub>2</sub> adsorbents derived from petroleum coke, an industrial by-product, using a two-step process involving thiourea modification and KOH activation. A series of N,S-codoped porous carbons was synthesized by varying activation temperatures and KOH quantity. The optimized sample exhibited a high specific surface area of 1088 m<sup>2</sup>/g, a narrow micropore volume of 0.52 cm<sup>3</sup>/g, and considerable heteroatom doping (1.57 at.% nitrogen and 0.19 at.% sulfur). The as-prepared adsorbent achieved a CO<sub>2</sub> adsorption capacity of 3.69 and 5.08 mmol/g at 1 bar, 25 °C and 0 °C, respectively, along with a CO<sub>2</sub>/N<sub>2</sub> selectivity of 17. Adsorption kinetics showed 90% of equilibrium uptake was achieved within 5 min, while cyclic studies revealed excellent stability with 97% capacity retention after five cycles. Thermodynamic analysis indicated moderate isosteric heat of adsorption (<i>Q<sub>st</sub></i>) values ranging from 18 to 47 kJ/mol, ensuring both strong adsorption and efficient desorption. These findings highlight the potential of petroleum coke-derived porous carbons for sustainable and efficient CO<sub>2</sub> capture applications.https://www.mdpi.com/1420-3049/30/2/426N,S-codoped porous carbonsCO<sub>2</sub> adsorptionpetroleum cokethiourea |
| spellingShingle | Jiawei Shao Yingyi Wang Mingyang Che Ya Liu Yongfu Jiang Qiang Xiao Muslum Demir Linlin Wang Xin Hu Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability Molecules N,S-codoped porous carbons CO<sub>2</sub> adsorption petroleum coke thiourea |
| title | Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability |
| title_full | Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability |
| title_fullStr | Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability |
| title_full_unstemmed | Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability |
| title_short | Sustainable CO<sub>2</sub> Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability |
| title_sort | sustainable co sub 2 sub capture n s codoped porous carbons derived from petroleum coke with high selectivity and stability |
| topic | N,S-codoped porous carbons CO<sub>2</sub> adsorption petroleum coke thiourea |
| url | https://www.mdpi.com/1420-3049/30/2/426 |
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