利用Kissinger方程的体积法数据求氢化物分解活化能的简单方法

IF 0.8 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
M. Song, Y. Kwak
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引用次数: 0

摘要

热分析方法,如TGA、DSC分析、DTA和TDS分析,已在许多报告中用于测定氢化物分解的活化能。在我们之前的工作中,我们证明了Mg-5Ni样品的脱水速率服从一阶定律,因此Kissinger方程可以用来确定活化能。在本工作中,我们使用了活化后的Mg-5Ni样品。我们通过从解吸氢量Hd与温度T的曲线中发现解吸氢量的变化与T的变化之比dHd/dT最高的温度,获得了不同加热速率下的Tm。从温度T与时间T曲线的拐点(Φ=dT/dT=0)也获得了不同加热速率下的Tm。然后通过将不同加热速率下的Tm应用于Kissinger方程来计算氢化物分解的活化能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simple Ways to Obtain Activation Energy for Hydride Decomposition by Applying Data from a Volumetric Method to the Kissinger Equation
Thermal analysis methods - such as TGA, DSC analysis, DTA, and TDS analysis - have been used in many reports to determine the activation energy for hydride decomposition. In our preceding work, we showed that the dehydriding rate of Mg-5Ni samples obeyed the first-order law and the Kissinger equation could thus be used to determine the activation energy. In the present work, we used the Mg-5Ni samples after activation. We obtained Tm at different heating rates by finding the temperature at which the ratio of the desorbed hydrogen quantity Hd change to T change, dHd/dT, was the highest from the desorbed hydrogen quantity Hd versus temperature T curves. Tm’s at different heating rates were also obtained from points of inflection (Φ = dT/dt = 0) in temperature T versus time t curves. The activation energy for hydride decomposition was then calculated by applying Tm’s at different heating rates to the Kissinger equation.
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来源期刊
Materials Science-medziagotyra
Materials Science-medziagotyra 工程技术-材料科学:综合
CiteScore
1.70
自引率
10.00%
发文量
92
审稿时长
6-12 weeks
期刊介绍: It covers the fields of materials science concerning with the traditional engineering materials as well as advanced materials and technologies aiming at the implementation and industry applications. The variety of materials under consideration, contributes to the cooperation of scientists working in applied physics, chemistry, materials science and different fields of engineering.
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