The preparation and properties of multi-component molten salts
The preparation and properties of multi-component molten salts
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DOI：
10.1016/j.apenergy.2009.06.022
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发表时间：
2010-09-01
期刊：
影响因子：
11.2
通讯作者：
Yang, Xiaoxi
中科院分区：
文献类型：
--
作者：
Peng, Qiang;Ding, Jing;Yang, Xiaoxi
本文主要研究了熔盐的热稳定性及其高温下的热物理性质。本实验采用静态混合法制备了由硝酸钾、亚硝酸钠和硝酸钠组成的多元熔盐，并添加5%的氯化物添加剂A。实验发现，添加5%添加剂A的熔盐具有更高的热稳定性，与三元硝酸盐相比，其最佳使用温度由500 ℃提高到550 ℃。同时，热稳定性和热循环分析表明，添加5%的添加剂A可以降低熔盐的凝固点，减少亚硝酸盐含量的损失，缩短熔盐变质时间。DSC测试还表明，添加5%的添加剂A的熔融盐的潜热损失减少。此外，测量的热物理性质显示具有5%添加剂A的熔融盐具有2.32kJ/kg摄氏度的热容，对于0摄氏度和100摄氏度之间的水低于4.19kJ/kg摄氏度，并且在150摄氏度和500摄氏度之间具有3.0至1.4cp的低粘度范围，对于0 ℃至100 ℃之间的水，类似于1.8-0.3 cp。其他热物理性能，如导热系数，密度和线性热膨胀也在这里确定。(C)2009爱思唯尔有限公司保留所有权利。
This paper was focused on thermal stability of molten salts and their thermo-physical properties at high temperature. In this experiment, multi-component molten salts composed of potassium nitrate, sodium nitrite and sodium nitrate with 5% additive A of the chlorides were prepared by statical mixing method. The experiments found molten salt with 5% additive A had higher thermal stability and its best operating temperature would be increased to 550 degrees C from 500 degrees C when comparing to ternary nitrate salt. Meanwhile, thermal stability and thermal cycling analysis showed molten salts with 5% additive A had lower freezing point and loss of nitrite content and deterioration time of molten salts were reduced at the same time. DSC tests also indicated loss of latent heat in molten salts with 5% additive A was decreased. Besides, thermo-physical properties measured showed molten salt with 5% additive A had a heat capacity of 2.32 kJ/kg degrees C, lower than 4.19 kJ/kg degrees C for water between 0 degrees C and 100 degrees C and a low viscosity range from 3.0 to 1.4 cp between 150 degrees C and 500 degrees C, analogous with 1.8-0.3 cp for water between 0 degrees C and 100 C. Other thermo-physical properties, such as thermal conductivity, density and linear thermal expansion, were also determined here. (C) 2009 Elsevier Ltd. All rights reserved.