The modification of high temperature thermal stability of molten salt by molten salt additives

Zhikang WAN; Xuehui AN; Peng ZHANG; Liuming YAN; Wenfeng WANG; Jinhui CHENG

doi:10.11889/j.0253-3219.2018.hjs.41.080602

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The modification of high temperature thermal stability of molten salt by molten salt additives

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-19

- The modification of high temperature thermal stability of molten salt by molten salt additives
- NUCLEAR TECHNIQUES Vol. 41, Issue 8, Article number: 080602(2018)
- 作者机构：
  
  1.上海大学理学院化学系上海 200444
  2.中国科学院上海应用物理研究所嘉定园区上海 201800
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;Strategic Priority Research Program of Chinese Academy of Sciences
- DOI：10.11889/j.0253-3219.2018.hjs.41.080602
  CLC： TL99
- Received：05 March 2018，
  
  Revised：10 May 2018，
  
  Published：2018-08
- 稿件说明：
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Zhikang WAN, Xuehui AN, Peng ZHANG, et al. The modification of high temperature thermal stability of molten salt by molten salt additives[J]. Nuclear techniques, 2018, 41(8): 080602
DOI：

Zhikang WAN, Xuehui AN, Peng ZHANG, et al. The modification of high temperature thermal stability of molten salt by molten salt additives[J]. Nuclear techniques, 2018, 41(8): 080602 DOI： 10.11889/j.0253-3219.2018.hjs.41.080602.

摘要

熔盐由于其化学性质稳定、传热性能优异，常被用作熔盐堆的冷却剂，同时熔盐的高温热稳定性也决定着熔盐堆的稳定。选取成本低廉、传蓄热性能优异的太阳盐（Solar salt）（NaNO

-KNO

，60%（wt）~40%（wt））熔盐作为基盐，Na

作为添加剂，研究了添加剂对熔盐高温热稳定性的影响。利用同步热分析仪、质量损失率-时间曲线研究了Na

对Solar salt工作温度范围和热稳定性的影响，并通过化学分析和pH值分析验证了Solar salt的分解产物。结果表明：添加1%（wt）的Na

能使Solar salt熔盐的工作温度范围扩大20 ℃，热稳定性提高3.2%。上述研究可以为添加剂在熔盐堆中的应用提供一定的参考。

Abstract

Background

The molten salt is used as the coolant of the molten salt reactor because of its stable chemical properties and excellent heat transfer performance. At the same time

the thermal stability of the molten salt also determines the stability of the molten salt reactor (MSR). In this paper

the effect of additives on the thermal stability of molten salt at high temperature was studied by selecting Solar salt (NaNO

-KNO

60%(wt)~40%(wt)) molten salt as a base salt and Na

as an additive.

Purpose

This study aims to improve the working temperature range and high temperature thermal stability of Solar salt molten salt.

Methods

The effect of Na

on the working temperature range and thermal stability of Solar salt was studied by the simultaneous thermal analysis and the mass loss rate-time curve. The decomposition products of Solar salt were verified by chemical analysis and pH analysis.

Results

By adding 1%(wt) Na

the working temperature range and thermal stability of the Solar salt molten salt were improved by 20 degree celsius and 3.2%

respectively.

Conclusion

This study can provide a reference to the improvement of high temperature thermal stability of molten salt in MSR.

关键词

Keywords

references

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