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Controlled preparation of nitrogen-doped hierarchical carbon cryogels derived from Phenolic-Based resin and their CO2 adsorption properties

Author

Listed:
  • Zhou, Yalan
  • Luo, Lu
  • Yan, Wen
  • Li, Zeliang
  • Fan, Mizi
  • Du, Guanben
  • Zhao, Weigang

Abstract

Nitrogen-doped hierarchical carbon cryogels with good monolithic structure are synthesized from phenol (P), melamine (M), and formaldehyde (F) by sol-gel, freeze-drying, and carbonization process with different molar ratios of F/(P + M). The synthesized cryogels have the characteristics of cost-effective and abundant hierarchical pores. The pore structures, chemical properties, and CO2 adsorption performance of the prepared carbon cryogels are investigated. The results reveal that the PF carbon cryogel without N doping shows poor porosity characteristics, which leads to lower CO2 adsorption performance. For the N-doped PMF carbon cryogels, with the increase in the molar ratio of F/(P + M), the specific surface area and micropore volume decreases from 1160.6 to 874.1 m2/g and from 0.47 to 0.35 cm3/g, respectively, indicating that a lower formaldehyde content is conducive to the formation of more micropores and higher specific surface area. The carbon cryogel PMF2.0 (F/(P + M) = 2.0) exhibits a CO2 adsorption capacity as high as 5.79 mmol/g, and it also has a high CO2/N2 adsorption selectivity (13.43) and isosteric adsorption heat (33.06 kJ/mol). Thus, the PMF carbon cryogel exhibits immense potential as an adsorbent for CO2 capture, and its excellent performance is attributed to the synergistic effect of N doping and abundant micropores with appropriate size.

Suggested Citation

  • Zhou, Yalan & Luo, Lu & Yan, Wen & Li, Zeliang & Fan, Mizi & Du, Guanben & Zhao, Weigang, 2022. "Controlled preparation of nitrogen-doped hierarchical carbon cryogels derived from Phenolic-Based resin and their CO2 adsorption properties," Energy, Elsevier, vol. 246(C).
  • Handle: RePEc:eee:energy:v:246:y:2022:i:c:s0360544222002705
    DOI: 10.1016/j.energy.2022.123367
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    References listed on IDEAS

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    1. Cui, Hongmin & Xu, Jianguo & Shi, Jinsong & Yan, Nanfu & Liu, Yuewei, 2019. "Facile fabrication of nitrogen doped carbon from filter paper for CO2 adsorption," Energy, Elsevier, vol. 187(C).
    2. Junya Wang & Qiuyun Pu & Ping Ning & Shijian Lu, 2021. "Activated carbonā€based composites for capturing CO2: a review," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 11(2), pages 377-393, April.
    3. Fan Guo & Yanqiu Jiang & Zhen Xu & Youhua Xiao & Bo Fang & Yingjun Liu & Weiwei Gao & Pei Zhao & Hongtao Wang & Chao Gao, 2018. "Highly stretchable carbon aerogels," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
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    Cited by:

    1. Shen, Qian & Zhu, Xianqing & Peng, Yang & Xu, Mian & Huang, Yun & Xia, Ao & Zhu, Xun & Liao, Qiang, 2024. "Structure evolution characteristic of hydrochar and nitrogen transformation mechanism during co-hydrothermal carbonization process of microalgae and biomass," Energy, Elsevier, vol. 295(C).
    2. Liu, Haorui & Wang, Shuoyu & Wang, Xiaoqiong & Feng, XiaoJing & Chen, Shuixia, 2022. "A stable solid amine adsorbent with interconnected open-cell structure for rapid CO2 adsorption and CO2/CH4 separation," Energy, Elsevier, vol. 258(C).

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