碳酸盐/高炉矿渣定型复合相变储热材料的制备与性能  

Carbonates/blast furnace slag form-stable phase change materials

作　　者：王君雷 张第玲 王昆 许东东 徐祥贵 姚华[1,2] 刘文巍 黄云 WANG Junlei;ZHANG Diling;WANG Kun;XU Dongdong;XU Xianggui;YAO Hua;LIU Wenwei;HUANG Yun(State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China;Dalian National Laboratory for Clean Energy,Dalian 116023,Liaoning,China)

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]天津大学内燃机燃烧学国家重点实验室,天津300072 [4]中国科学院洁净能源创新研究院,辽宁大连116023

出　　处：《储能科学与技术》2022年第9期3028-3034,共7页Energy Storage Science and Technology

基　　金：国家自然科学基金(21975262);中科院清洁能源先导基金(DNL202017);河南省储能材料与过程重点实验室(202102)。

摘　　要：碳酸盐(Na_(2)CO_(3)和K_(2)CO_(3))是极具潜力的高温相变材料,高炉矿渣(blast furnace slag,BS)作为基体材料兼具环境和经济效益,但是碳酸盐在高温熔融状态下通常会与高炉矿渣发生反应。为此,本工作发展两步法制备路线以攻克这一问题。首先,使用碳酸盐对高炉矿渣进行改性,得到化学性质稳定的改性矿渣(modified blast furnace slag,MBS);其次,通过混合烧结法制备碳酸盐/改性矿渣定型复合相变材料(form-stable phase change materials,FSPCMs)。经过冷热循环测试制备的K_(2)CO_(3)/KMBS复合相变材料比Na_(2)CO_(3)/NMBS的定型效果更优。分析发现,K_(2)CO_(3)与KMBS具有良好的化学相容性,随着K_(2)CO_(3)含量增加,K_(2)CO_(3)/KMBS定型相变材料的潜热逐渐增加,且测试结果与计算一致,在质量比4∶6(40K_(2)CO_(3)/60KMBS)时,潜热为94.8 k J/kg,且热稳定性最好。Blast furnace slag(BFS)is a very affordable matrix material,and carbonates(Na_(2)O_(3) and K_(2)O_(3))are promising phase change materials for high-temperature applications;however,carbonates react with BFS when it is in the molten state.A two-step approach was created as a result to solve this problem.First,carbonate was used to modify BFS so that it can no longer react with carbonate;second,a hybrid sintering method was used to create form-stable phase change materials(FSPCMs).After thermal cycling,the obtained K_(2)O_(3)/KMBS FSPCMs exhibited better shape preservation than Na_(2)O_(3)/NMBS FSPCMs.Further tests revealed that K_(2)O_(3) and KMBS were chemically compatible.The measurement was consistent with the calculated value,and the latent heat of K_(2)O_(3)/KMBS FSPCMs gradually increased with the increase in K_(2)O_(3)content.At the mass ratio of 4∶6(40K_(2)O_(3)/60KMBS),the latent heat is 94.8 k J/kg,and the thermal stability is the best.

关 键 词：储热 碳酸盐 改性矿渣 定型复合相变材料 

分 类 号：TK02[动力工程及工程热物理]