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CO 2 Adsorption Performance of Activated Coke Prepared from Biomass and Coal

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  • He Gao

    (Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China
    Institute for Advanced Technology, Shandong University, Jinan 250061, China)

  • Shaohua Wang

    (Shandong Provincial Oil and Gas Pipeline Protection Service Center, Jinan 250012, China)

  • Miaomiao Hao

    (Center for Ecology and Environmental Protection Education and Communications of Shandong Province, Jinan 250100, China)

  • Wei Shao

    (Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China)

  • Shuhui Zhang

    (Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China)

  • Lei Zhang

    (Department of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Xiaohan Ren

    (Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China)

Abstract

CO 2 adsorption is one of the promising CCS technologies, and activated coke is a solid adsorbent with excellent adsorption properties. In this study, activated coke was prepared by using bituminous coal and coconut shells activated with KOH or CaCl 2 in a physically activated atmosphere and modified with ammonia. The effect of the active agent impregnation ratio on the physicochemical properties of activated coke was investigated by N 2 adsorption isotherms, scanning electron microscopy (SEM) and Fourier transform infrared spectrometry (FTIR). The CO 2 adsorption performance of activated coke was tested, and the effect of nitrogen-containing functional groups on CO 2 adsorption was investigated by experiments and simulations. The results showed that the specific surface area of activated coke reached 629.81 m 2 /g at a KOH impregnation ratio of 0.5 and 610.66 m 2 /g at a CaCl 2 impregnation ratio of 1. The maximum CO 2 adsorption capacity of activated coke reached 71.70 mg/g and 90.99 mg/g for conventional power plant flue gas and oxy–fuel combustion flue gas, respectively. After ammonia modification, the CO 2 adsorption capacity of activated coke was further increased. Simulations showed that pyrrole and pyrrole functional groups changed the polarity of graphene and established weak interactions with CO 2 .

Suggested Citation

  • He Gao & Shaohua Wang & Miaomiao Hao & Wei Shao & Shuhui Zhang & Lei Zhang & Xiaohan Ren, 2023. "CO 2 Adsorption Performance of Activated Coke Prepared from Biomass and Coal," Energies, MDPI, vol. 16(9), pages 1-21, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:9:p:3872-:d:1138393
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    References listed on IDEAS

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    2. Tan, Y.L. & Islam, Md. Azharul & Asif, M. & Hameed, B.H., 2014. "Adsorption of carbon dioxide by sodium hydroxide-modified granular coconut shell activated carbon in a fixed bed," Energy, Elsevier, vol. 77(C), pages 926-931.
    3. Yaumi, A.L. & Bakar, M.Z. Abu & Hameed, B.H., 2017. "Reusable nitrogen-doped mesoporous carbon adsorbent for carbon dioxide adsorption in fixed-bed," Energy, Elsevier, vol. 138(C), pages 776-784.
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