多元氯化物熔盐储能材料的制备及其热性能评价  

Preparation of Polychlorinated Salt Storage Material and Evaluation for Thermal Performance

作　　者：徐贵钰[1] 何廷鸿 殷海青[1] 祝永强[1] 王广乐[1] 

机构地区：[1]青海民族大学化学化工学院,西宁810007

出　　处：《四川理工学院学报（自然科学版）》2017年第4期6-9,共4页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：国家自然科学基金项目(21361021)

摘　　要：采用静态熔融法制备了以六水氯化镁、氯化钠和氯化钾为原料的10种不同质量比的多元混合氯化物熔盐。通过TG-DSC测试手段,测定其熔点、相变潜热等热物性参数,并优选出熔点低、相变潜热大的混合氯化物熔盐,确定最佳质量比,进而考察熔盐在不同温度下灼烧不同时间的质量损失,以评价其热化学稳定性。实验结果表明,当六水氯化镁、氯化钠、氯化钾的质量比为4∶5∶1时,制备的多元混合氯化物熔盐的熔点最低,为405.7℃,相变潜热为113.0 J/g,最佳工作温度范围为455℃~800℃。在800℃以下,该混合氯化物熔盐具有较好的热稳定性,是一种较为理想的高温熔盐相变储能材料。Using the static melting method,a mixture chloride molten salt has been prepared by 10 different mass ratios of bischofite,sodium chloride and potassium chloride. By TG-DSC,the thermal physical parameters,such as melting point and phase change latent heat,are determined. After analysing chloride molten salt with low melting point and phase chang latent heat,the optimum mass ratio is determined,then its thermal chemical stability can be evaluated. The experimental results show that,when the mass ratio of bischofite,sodium chloride,potassium chloride is 4 ∶ 5 ∶ 1,mixed chloride molten salt melting point is 405. 7 ℃,phase change latent heat for the 113. 0 J/g,the best working temperature range of 455 ℃ -800 ℃. Under 800 ℃,the molten salt with good thermal stability,is an ideal high temperature molten salt phase change energy storage material.

关 键 词：氯化物 熔盐 储能材料 热稳定性 

分 类 号：TQ115[化学工程—无机化工]