无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (10): 114-120.doi: 10.19964/j.issn.1006-4990.2022-0730

• 环境·健康·安全 • 上一篇    下一篇

氯化钠-硫酸钠/硅基相变材料的热物性研究

袁子鸥1(), 王峰1(), 祁星朝1, 张琦1, 马剑龙1, 唐忠锋2()   

  1. 1.内蒙古工业大学能源与动力工程学院,内蒙古 呼和浩特 010051
    2.中国科学院上海应用物理研究所,上海 201800
  • 收稿日期:2022-12-09 出版日期:2023-10-10 发布日期:2023-10-16
  • 通讯作者: 王峰(1981— ),女,博士,副教授,主要研究方向为碳捕集技术、熔盐储热;E-mail:wangfeng@imut.edu.cn
    唐忠锋(1976— ),男,博士,研究员,主要研究方向为能源材料化学、碳捕集和熔盐储能等;E-mail:tangzhongfeng@sinap.ac.cn
  • 作者简介:袁子鸥(1998— ),女,硕士,主要研究方向为碳捕集及熔盐储热;E-mail:yuan980317@163.com
  • 基金资助:
    内蒙古自治区科技计划项目(2021ZD0036);国家自然科学基金项目(52076006);中国科学院洁净能源创新研究院合作基金项目(DNL202012)

Thermal properties of sodium chloride-sodium sulfate/silicon-based phase change composites

YUAN Ziou1(), WANG Feng1(), QI Xingzhao1, ZHANG Qi1, MA Jianlong1, TANG Zhongfeng2()   

  1. 1.College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051 ;China
    2.Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China
  • Received:2022-12-09 Published:2023-10-10 Online:2023-10-16

摘要:

采用高温熔融法制备NaCl-Na2SO4共晶熔盐,使用介孔MCM-41和微孔13X硅基材料为载体制备相变复合材料,研究相变复合材料的物相、结构、微观形貌及热物性的变化。结果表明,负载熔盐后硅基材料的孔结构保持完好,晶体结构维持不变,硅基材料作为骨架在高温下起到定型和提高稳定性的作用。NaCl-Na2SO4熔盐熔点为623 ℃,介孔MCM-41负载熔盐后其熔点为618 ℃,微孔13X负载熔盐后其熔点为607 ℃,负载熔盐后复合材料熔点略有降低。NaCl-Na2SO4熔盐在700 ℃的高温下质量损失率>3%,与其相比,负载MCM-41硅基材料后其分解温度提高,比热容为0.652 J/(g·℃),MCM-41硅基材料与共晶盐有良好的相容性。该研究能有效地改善熔盐在服役过程中的易泄漏和强腐蚀问题,具有重要的研究意义和应用价值。

关键词: NaCl-Na2SO4熔盐, 腐蚀, 硅基相变材料, 复合材料, 热物性

Abstract:

NaCl-Na2SO4 eutectic molten salts were prepared by the high temperature melting process.Composites phase change materials with silicon porous matrix were prepared by employing the mesoporous MCM-41 and microporous 13X as carriers for the problems of leakages and strong corrosion of molten salts.The changes in the structure,microtopography and thermophysical property of the composite phase change materials were investigated by the various methods.The results showed that the pore structure and crystalline structure of the silicon-based materials remained intact after the loading of molten salt.The silicon-based material as the skeleton played a role in setting and improving the stability at high temperature.The melting point of NaCl-Na2SO4 molten salts was 623 ℃,the melting point of composites using the mesoporous MCM-41 was 618 ℃,and the melting point of composites using the microporous 13X was 607 ℃.The melting point of the composites was slightly reduced after loading with the molten salts.The weight loss of NaCl-Na2SO4 molten salts was more than 3% at 700 ℃.The decomposition temperature of composites using MCM-41 was increased and the specific calorific value was 0.652 J/(g·℃).MCM-41 silicon-based material had good compatibility with eutectic salt.It could effectively improve the leakage and strong corrosion of molten salt in the service process and had important research implications and applications value.

Key words: NaCl-Na2SO4 molten salt, corrosion, silicon-based phase change materials, composite, thermophysical property

中图分类号: