Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gas
Nitrogen (N)-doped microporous hollow carbon spheres were prepared by facilely nanocasting spherical SiO2 with N-containing melamine phenolic resin through a simple in-situ polymerization process. Through regulating the dosage of melamine, N content in microporous hollow carbons could be easily tune...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of CO2 Utilization |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982023001816 |
| _version_ | 1797686901908439040 |
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| author | Zhongzheng Zhang Lina Zhang Qiang Gao Nannan Sun Wei Wei |
| author_facet | Zhongzheng Zhang Lina Zhang Qiang Gao Nannan Sun Wei Wei |
| author_sort | Zhongzheng Zhang |
| collection | DOAJ |
| description | Nitrogen (N)-doped microporous hollow carbon spheres were prepared by facilely nanocasting spherical SiO2 with N-containing melamine phenolic resin through a simple in-situ polymerization process. Through regulating the dosage of melamine, N content in microporous hollow carbons could be easily tuned to an unprecedented level of 49.2 wt%. Additionally, in order to address the common problem of relatively poor structural porosity of N-doped carbons, especially after incorporating vast N into carbon frameworks in reported literature, a comprehensive strategy including optimizing carbonization temperature and performing further activation by CO2 and KOH were explored, and their effects on material textural properties and CO2 capacity were systematically studied. Although this strategy did not completely avoid the N loss during activation of carbon materials, it sharply promoted the textural properties of carbon materials at the expenses of partial N and efficiently produced a series of highly microporous carbon materials, still with abundant N species (11.5 ∼ 29.9 wt%) and large structural porosity (330 ∼ 1263 m2/g). More importantly, these N-doped microporous hollow carbons, when used for CO2 capture, showed superior CO2 capacities of 3.00 mmol/g (25 °C and 1 bar) and 1.05 mmol/g (40 °C and 0.1 bar), exceptionally robust cyclic stability, and low regeneration energy of 2.75 GJ/ton CO2, which is much lower than aqueous amine-based absorbents and comparable to amine-supported adsorbents. Thus, these outstanding adsorption performances make the N-doped microporous hollow carbon spheres prepared in this study more promising for energy-effective CO2 capture from dilute gas streams. |
| first_indexed | 2024-03-12T01:11:16Z |
| format | Article |
| id | doaj.art-f770968c640a461d90069b760af079be |
| institution | Directory Open Access Journal |
| issn | 2212-9839 |
| language | English |
| last_indexed | 2024-03-12T01:11:16Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj.art-f770968c640a461d90069b760af079be2023-09-14T04:53:32ZengElsevierJournal of CO2 Utilization2212-98392023-09-0175102570Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gasZhongzheng Zhang0Lina Zhang1Qiang Gao2Nannan Sun3Wei Wei4CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201203, China; Corresponding authors.CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201203, ChinaCAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201203, ChinaCAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201203, China; Corresponding authors.CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201203, China; School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China; Corresponding author at: CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201203, China.Nitrogen (N)-doped microporous hollow carbon spheres were prepared by facilely nanocasting spherical SiO2 with N-containing melamine phenolic resin through a simple in-situ polymerization process. Through regulating the dosage of melamine, N content in microporous hollow carbons could be easily tuned to an unprecedented level of 49.2 wt%. Additionally, in order to address the common problem of relatively poor structural porosity of N-doped carbons, especially after incorporating vast N into carbon frameworks in reported literature, a comprehensive strategy including optimizing carbonization temperature and performing further activation by CO2 and KOH were explored, and their effects on material textural properties and CO2 capacity were systematically studied. Although this strategy did not completely avoid the N loss during activation of carbon materials, it sharply promoted the textural properties of carbon materials at the expenses of partial N and efficiently produced a series of highly microporous carbon materials, still with abundant N species (11.5 ∼ 29.9 wt%) and large structural porosity (330 ∼ 1263 m2/g). More importantly, these N-doped microporous hollow carbons, when used for CO2 capture, showed superior CO2 capacities of 3.00 mmol/g (25 °C and 1 bar) and 1.05 mmol/g (40 °C and 0.1 bar), exceptionally robust cyclic stability, and low regeneration energy of 2.75 GJ/ton CO2, which is much lower than aqueous amine-based absorbents and comparable to amine-supported adsorbents. Thus, these outstanding adsorption performances make the N-doped microporous hollow carbon spheres prepared in this study more promising for energy-effective CO2 capture from dilute gas streams.http://www.sciencedirect.com/science/article/pii/S2212982023001816N-doped microporous carbonHollow structureCO2 activationKOH activationCO2 adsorption |
| spellingShingle | Zhongzheng Zhang Lina Zhang Qiang Gao Nannan Sun Wei Wei Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gas Journal of CO2 Utilization N-doped microporous carbon Hollow structure CO2 activation KOH activation CO2 adsorption |
| title | Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gas |
| title_full | Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gas |
| title_fullStr | Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gas |
| title_full_unstemmed | Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gas |
| title_short | Robust nitrogen-doped microporous hollow carbon spheres for energy-efficient CO2 capture from flue gas |
| title_sort | robust nitrogen doped microporous hollow carbon spheres for energy efficient co2 capture from flue gas |
| topic | N-doped microporous carbon Hollow structure CO2 activation KOH activation CO2 adsorption |
| url | http://www.sciencedirect.com/science/article/pii/S2212982023001816 |
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