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本文以气相色谱为主要手段测定了十种羧酸镍盐在氦气和氢气中的热稳定性,对一些重叠的脱水峰,用高斯曲线进行分峰,结果能同晶体结构相对应,脱羧反应可分为两类:羟乙酸镍以Ni[-COO]_2→NiO+CO+CO_2为主,其他镍盐以Ni[-COO]_2→Ni+2CO_2为主,螯合效应增加镍盐的热稳定性,镍盐在氢气中热分解时,由于加氢催化,峰值温度比在氦气中提前,分解温度范围变小。以早先提出的热分解动力学方程计算了分解活化能,结果比常见的动力学方程更符合实验。
In this paper, the thermal stability of ten nickel salts of nickel carboxylates in helium and hydrogen was determined by gas chromatography. Some overlapping dehydration peaks were peaked by Gaussian curves. The results were in agreement with the crystal structure. The decarboxylation reaction There are two types of Ni (-COO) _2 → NiO + CO + CO_2 for nickel glycolate, and the other nickel salts are mainly Ni [-COO] _2 → Ni + 2CO_2. The chelation effect increases the heat of nickel salt Stability, nickel salt in the thermal decomposition of hydrogen, due to the hydrogenation catalyst, the peak temperature ahead of helium, the decomposition temperature range becomes smaller. The decomposition activation energy was calculated using the previously proposed thermal decomposition kinetic equation and the results were more in line with the experimental kinetic equations.