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Preparation and performance of coal-based activated carbon based on an orthogonal experimental study

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  • Zhao, Can
  • Ge, Lichao
  • Mai, Longhui
  • Chen, Simo
  • Li, Qian
  • Yao, Lei
  • Li, Dongyang
  • Wang, Yang
  • Xu, Chang

Abstract

To improve the utilization value of coal resources and optimize the production process of coal-based activated carbon, an L9 (34) orthogonal experiment was designed to study the comprehensive effects of the carbonization temperature, heating rate, activation time and activator type on the specific surface area and iodine value of activated carbon prepared by physical activation, as well as the surface chemical and crystal properties. The results showed that large amounts of C–H and oxygen functional groups from the raw materials were lost in the process of preparing the activated carbon, and CaCO3 generated CaS through a two-step reaction. The raw materials were nonporous or macroporous materials, while the activated carbon developed a microporous structure. The same optimal working conditions were obtained when the iodine value and the specific surface area were used as the optimization target, as follows: 800 °C for carbonization, 10 °C/min for heating rate, 75 min for activation time, and steam + CO2 as the activator. Finally, activated carbon was prepared under the optimal experimental conditions. The results showed that this activated carbon had the highest specific surface area and iodine value. In addition, the iodine value had a good linear relationship with the specific surface area.

Suggested Citation

  • Zhao, Can & Ge, Lichao & Mai, Longhui & Chen, Simo & Li, Qian & Yao, Lei & Li, Dongyang & Wang, Yang & Xu, Chang, 2023. "Preparation and performance of coal-based activated carbon based on an orthogonal experimental study," Energy, Elsevier, vol. 274(C).
    • Handle: RePEc:eee:energy:v:274:y:2023:i:c:s0360544223007478
    DOI: 10.1016/j.energy.2023.127353
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    References listed on IDEAS

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    1. Ge, Lichao & Zhao, Can & Zhou, Tianhong & Chen, Simo & Li, Qian & Wang, Xuguang & Shen, Dong & Wang, Yang & Xu, Chang, 2023. "An analysis of the carbonization process of coal-based activated carbon at different heating rates," Energy, Elsevier, vol. 267(C).
    2. Xin, Lin & An, Mingyu & Feng, Mingze & Li, Kaixuan & Cheng, Weimin & Liu, Weitao & Hu, Xiangming & Wang, Zhigang & Han, Limin, 2021. "Study on pyrolysis characteristics of lump coal in the context of underground coal gasification," Energy, Elsevier, vol. 237(C).
    3. Yahya, Mohd Adib & Al-Qodah, Z. & Ngah, C.W. Zanariah, 2015. "Agricultural bio-waste materials as potential sustainable precursors used for activated carbon production: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 46(C), pages 218-235.
    4. Ge, Lichao & Zhao, Can & Chen, Simo & Li, Qian & Zhou, Tianhong & Jiang, Han & Li, Xi & Wang, Yang & Xu, Chang, 2022. "An analysis of the carbonization process and volatile-release characteristics of coal-based activated carbon," Energy, Elsevier, vol. 257(C).
    5. Li, He & Shi, Shiliang & Lin, Baiquan & Lu, Jiexin & Ye, Qing & Lu, Yi & Wang, Zheng & Hong, Yidu & Zhu, Xiangnan, 2019. "Effects of microwave-assisted pyrolysis on the microstructure of bituminous coals," Energy, Elsevier, vol. 187(C).
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    1. Zhao, Can & Ge, Lichao & Zuo, Mingjin & Mai, Longhui & Chen, Simo & Li, Xiaolong & Li, Qian & Wang, Yang & Xu, Chang, 2023. "Study on the mechanical strength and iodine adsorption behavior of coal-based activated carbon based on orthogonal experiments," Energy, Elsevier, vol. 282(C).

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