NaNO2-KNO3-NaNO3三元熔盐体系的物理化学性质与结构进行了深入 研究。 材料和方法: 实验材料包括分析纯的NaNO2、KNO3和NaNO3,实验设备包括热分析 仪(如DSC/TGA)、光谱仪(如FTIR、Raman)、电导率计和X射线 衍射仪。实验方法包括热分析、光谱分析、电导率测量和X射线衍射。
本实验研制了高温原位紫外-可见吸收光谱仪,并结合标准的电子顺磁共振谱仪来研究HTS(53wt%KNO3—40wt%NaNO2-7wt%NaNO3)熔盐分解过程中是否产生超氧离子.实验结果表明NaNO2相对于NaNO3更易于产生超氧负离子,并且熔盐中的超氧负离子在420~440nm有吸收峰,在HTS熔盐中该吸收峰随温度升高发生红移.这个吸收峰可归属为NaO2...
(HTS,53 wt% KNO3/40 wt% NaNO2/7 wt% NaNO3).It is found that the superoxide is m ore easily generated from molten NaNO2 com pared to NaNO3,and it has an absorption band at 420—440 nm in HTS which red shifts as temperature increases.The band is assigned to charge—transfer transition...
3 结论 本文利用Buckingham势函数对NaNO3-KNO3- NaNO2三元混合熔盐进行了分子动力学计算。径向分布函数、配位数与角分布函数计算结果表明,随着温度的升高,离子间相互作用减弱,离子团簇变得松散,且异号离子之间距离变大,而同号离子间距没有明显变化。配位数与角分布函数表明混合熔盐中阴阳离子呈六配位八面体构型,且Na-...
KNO3NaNO2系熔盐的物理化学性质研究--优秀毕业论文 热度: 东北大学 硕士学位论文 NaNO<,2>-KNO<,3>-NaNO<,3>三元熔盐体系物理化学性质与结构 的研究 姓名:*** 申请学位级别:硕士 专业:化学工程 指导教师:**亮 20090601 东北大学硕士学位论文摘要 NaN...
In support of advanced solar central receiver programs, six commercially available, iron-based construction materials were exposed to a molten NaNO2-NaNO3-KNO3 salt mixture at 823 K for periods up to six months. After one month of exposure, oxide coatings formed on each alloy;the amount of oxid...
通过调整多元盐配方可以获得更低熔点和凝固点的熔融盐;如GLADEN等制备出了熔点为75.6 ℃的多元盐,WANG等发现了一种四元盐(LiNO3-NaNO3-KNO3-NaNO2)具有较低的熔点(99 ℃),GOMEZ等也报道了36%Ca(NO3)2-48% KNO3-16%NaNO3熔盐的固相线温度为102.3℃。通常认为,熔融盐存在使用温度上限,将熔融硝酸盐加热到高于此...
The corrosion of stainless steel SS316L in a low melting point novel LiNO3-NaNO3-KNO3-NaNO2 eutectic molten salt mixture was investigated at 695K. After long-term isothermal dipping corrosion experiments, the SS316L samples were analyzed using scanning electron microscopy (SEM) equipped with ...
Then, 2.65g of KNO3, 0.35g of NaNO3, and 2.0g of NaNO2 were accurately weighed using a balance, ground uniformly in an agate mortar, and then placed in a 100 ml ceramic crucible. The crucible was then placed in a muffle furnace and maintained at 300 °C for 24 h. Subsequently, the...
二甲基亚砜(DMSO)工业废渣含NaNO3及少量有毒的NaNO2,以该废渣为原料制备农用KNO3,既实现资源回收利用又保护了环境。工艺流程如下:(1)农用KNO3为农作物