储能科学与技术 ›› 2023, Vol. 12 ›› Issue (12): 3690-3698.doi: 10.19799/j.cnki.2095-4239.2023.0683

• 复合储热专辑 • 上一篇    下一篇

碳捕捉对电石渣-钢渣复合相变储热材料性能的影响

杨洋1(), 熊亚选1(), 任静2, 赵彦琦3(), 李烁1, 田曦1, 丁玉龙4   

  1. 1.北京建筑大学供热供燃气通风及空调工程北京市重点实验室，北京 100044
    2.北京中建 建筑科学研究院有限公司，北京 100076
    3.南京工业大学能源科学与工程学院，江苏 南京 211816
    4.伯明翰大学伯明翰储能中心，伯明翰 B15 2TT
  • 收稿日期:2023-09-29 修回日期:2023-10-15 出版日期:2023-12-05 发布日期:2023-12-09
  • 通讯作者: 熊亚选,赵彦琦 E-mail:562532701@qq.com;xiongyaxuan@bucea.edu.cn;zhaoyanqi456@126.com
  • 作者简介:杨洋(1997—)，男，硕士研究生，主要从事固体储热研究，E-mail：562532701@qq.com；
  • 基金资助:
    国家自然科学基金(52006008);北京市教委科研项目(KM201910016011);北京建筑大学科学研究基金(Z13086)

Effects of CO2 capture on carbide-steel slag shape-stable phase-change composites

Yang YANG1(), Yaxuan XIONG1(), Jing REN2, Yanqi ZHAO3(), Shuo LI1, Xi TIAN1, Yulong DING4   

  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.Birmingham Center for Energy Storage, University of Birmingham, Birmingham B15 2TT, UK
  • Received:2023-09-29 Revised:2023-10-15 Online:2023-12-05 Published:2023-12-09
  • Contact: Yaxuan XIONG, Yanqi ZHAO E-mail:562532701@qq.com;xiongyaxuan@bucea.edu.cn;zhaoyanqi456@126.com

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摘要：

为资源化利用工业固废，降低储热系统成本，选取电石渣和钢渣1∶1混合进行CO2捕集和封存，将封存CO2的电石渣-钢渣混合材料作为骨架材料制备7种不同配比的NaNO3/固碳电石渣-钢渣复合相变储热材料。通过热重分析法探究电石渣-钢渣混合材料的固碳性能，利用差示扫描量热法、高温热冲击法、X射线衍射法、电子显微法表征其储热性能、热循环稳定性、化学相容性和微观结构。结果表明，电石渣-钢渣混合材料的固碳率为24.48%；最佳热性能样品CC-SC4中NaNO3、电石渣和钢渣的质量比为2∶1∶1，100～400 ℃工作温度内储热密度达到444.2 J/g，热导率为1.057 W/(m·K)，各组分间具有良好的化学相容性；样品CC-SC4经历1440次加热/冷却循环后仍具有优异的储热性能。

关键词: 工业固废, 骨架材料, 复合相变储热材料, 固碳, 储热性能, 热循环稳定性

Abstract:

To achieve sufficient utilization of industrial solid waste and reduce the cost of thermal energy storage (TES) systems, a mixture of alkaline solid waste of carbide slag (CS) and steel slag (SS) is selected at a 1∶1 ratio for CO2 capture and sequestration. In addition, seven types of carbon-captured shape-stable phase-change composite materials (CCSMs) with different ratios of NaNO3/CS-SS were prepared by combining CS and SS as the skeleton materials after CO2 sequestration. Furthermore, thermogravimetric analysis was conducted to characterize the carbon sequestration properties of the CS-SS hybrid materials. Moreover, the TES performance, thermal cycling stability, chemical compatibility, and microstructure of CCS were characterized using differential scanning calorimetry (DSC), high-temperature thermal shock method, X-ray diffraction (XRD) analysis,and scanning electron microscopy. The results indicate that the carbon-sequestration rate of the CS-SS hybrid material is 24.48%. Furthermore, the mass ratio of NaNO3, CS, and SS in the best thermal performance sample of CC-SC4 was 2∶1∶1, with its thermal storage density reaching 444.2 J/g at a working temperature of 100—400 ℃, thermal conductivity of 1.057 W/(m·K), and chemical compatibility among the components. Sample CC-SC4 exhibited excellent thermal storage performance after 1440 heating/cooling cycles.

Key words: industrial solid waste, skeleton material, shape-stable phase change composite, carbon capture and storage, thermal energy-storage performance, thermal cycling stability

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