Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (12): 3709-3719.doi: 10.19799/j.cnki.2095-4239.2023.0685

• Special issue on composite thermal storage • Previous Articles     Next Articles

Effect of carbon sequestration on the performance of waste concrete shape-stable phase change composites

Xi TIAN1(), Yaxuan XIONG1(), Jing REN2, Yanqi ZHAO3, Shihao JIN4, Shuo LI1, Yang YANG1, Yulong DING5   

  1. 1.Beijing Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
    2.Beijing Building Research Institute CO. , LTD. of CSCEC, Beijing 100076, China
    3.School of Energy Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China
    4.State Grid Henan Provincial Power Company Yuzhou Power Supply Company, Xuchang 461670, Henan, China
    5.Birmingham Center for Energy storage, University of Birmingham, Birmingham B15 2TT, UK
  • Received:2023-09-30 Revised:2023-10-11 Online:2023-12-05 Published:2023-12-09
  • Contact: Yaxuan XIONG E-mail:TX17731114603@163.com;xiongyaxuan@bucea.edu.cn

Abstract:

In order to fully resource the use of waste concrete to capture and store CO2, this paper utilizes waste concrete for carbon capture, and seven composite phase change heat storage materials with different mass ratios were prepared by using carbon consolidated and unconsolidated waste. Results indicate that the carbon sequestration efficiency of the waste concrete was as high as 24.7% under the specific experimental conditions. The latent heat of melting of the shape-stable phase change composites prepared by carbon sequestration was higher than that before carbon sequestration after adding the same mass fraction of phase change material. The compressive strength of SS2 was as high as 121.54 MPa, and the compressive strengths of both the carbon sequestered waste concrete and shape-stable phase change composites were significantly increased, with the highest thermal conductivity [0.648 W/(m·K)] being lower than that of the un-sequestered sample [0.884 W/(m·K)]. The shape-stable phase change composites before and after carbon sequestration had good chemical compatibility among the components, and the phase change materials were densely bonded with the skeleton materials.

Key words: waste concrete, carbon sequestration, skeleton material, shape-stable phase change composites, energy storage

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