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CO2 capture on aminosilane functionalized alumina-extracted residue of catalytic gasification coal ash

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  • Li, Xiangyu
  • Wang, Zhiqing
  • Feng, Ru
  • Huang, Jiejie
  • Fang, Yitian

Abstract

The technology of alumina-extraction from coal ash provides an effective way for re-utilization of coal based solid waste as resource. However, one of the most serious challenges that this technology face is the harmless treatment of alumina-extracted residue (AR). Considering the structure and properties of AR, a scheme was proposed to make the AR as a potential sorbent for CO2, and in order to achieve enhanced CO2 adsorption performance, the AR was functionalized with (3-aminopropyl) triethoxysilane (APTES). Moreover, the effects of amine grafting amount and temperature on CO2 adsorption capacity of sorbents were investigated. The results show that at 25 °C and 100% CO2, the sample obtained by adding 12 mmol of APTES presented the maximum CO2 adsorption capacity of 1.23 mmol/g. The sorbent can be regenerated successfully at 110 °C and maintain a stable uptake in 5 repeated adsorption–desorption cycles. These results suggested that APTES functionalized alumina-extracted residue is a potential excellent sorbent for CO2 absorption.

Suggested Citation

  • Li, Xiangyu & Wang, Zhiqing & Feng, Ru & Huang, Jiejie & Fang, Yitian, 2021. "CO2 capture on aminosilane functionalized alumina-extracted residue of catalytic gasification coal ash," Energy, Elsevier, vol. 221(C).
    • Handle: RePEc:eee:energy:v:221:y:2021:i:c:s0360544220327493
    DOI: 10.1016/j.energy.2020.119642
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    References listed on IDEAS

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    1. Zhao, Chuanwen & Guo, Yafei & Yan, Junjie & Sun, Jian & Li, Weiling & Lu, Ping, 2019. "Enhanced CO2 sorption capacity of amine-tethered fly ash residues derived from co-firing of coal and biomass blends," Applied Energy, Elsevier, vol. 242(C), pages 453-461.
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    4. Sanna, Aimaro & Ramli, Ili & Mercedes Maroto-Valer, M., 2015. "Development of sodium/lithium/fly ash sorbents for high temperature post-combustion CO2 capture," Applied Energy, Elsevier, vol. 156(C), pages 197-206.
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    Cited by:

    1. Zhao, Peiyu & Yin, Yanchao & Xu, Xianmang & Yang, Deliang & Wang, Jin & Yang, Fuxing & Zhang, Guojie, 2022. "Facile fabrication of mesoporosity silica as support for solid amine CO2 adsorbents with enhanced adsorption capacity and kinetics," Energy, Elsevier, vol. 253(C).
    2. Li, Xiangyu & Wang, Zhiqing & Liu, Zheyu & Feng, Ru & Song, Shuangshuang & Huang, Jiejie & Fang, Yitian, 2022. "A novel preparation of solid amine sorbents for enhancing CO2 adsorption capacity using alumina-extracted waste," Energy, Elsevier, vol. 248(C).

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