论文部分内容阅读
本文应用了富兰克—卡缅涅茨基的热自燃稳定理论,结合混气导热率和浓度的关系,系统地研究了 J.C.李和 P.格莱的肼—氧混气的热自燃实验数据。在350~550℃间得出了肼氧反应的表观活化能和指前因子等动力学数据和导出了最小的热自燃温度和压力等的计算方程式。由所得方程式计算和作出了“压力—组成”、“压力—温度”和“温度—组成”的曲线图,与实验结果符合。同时有关容器大小和表面性质的变更以及惰性气体的加入所引起对热自燃的影响,也作了比较详细的探讨。初步认为容器表面本性的改变可以使肼氧反应的活化能、指前因子发生变更,而且缩小自燃区;而惰性气体加入对动力学参数影响不大,但是由于改变了混气的导热性质而使热自燃条件有所变更。
In this paper, the theory of thermal autoignition of Frank-Kamenezky was applied. Based on the relationship between the thermal conductivity of mixed gas and the concentration, the experimental data of thermal pyrolysis of hydrazine-oxygen mixed gas by JC Li and P. Glewe . The kinetic data of apparent activation energy and pre-exponential factor of hydrazine oxygen reaction and the equations for calculating the minimum thermal autoignition temperature and pressure are derived from 350 to 550 ℃. From the equation obtained and the “pressure - composition”, “pressure - temperature” and “temperature - composition” of the curve, in line with the experimental results. At the same time on the container size and surface properties of the change and the addition of inert gas caused by thermal spontaneous combustion, but also made a more detailed discussion. It is preliminarily believed that the change of the nature of the surface of the vessel can change the activation energy and the pre-exponential factor of the hydrazine oxygen reaction and reduce the spontaneous combustion zone. However, the addition of inert gas has little effect on the kinetic parameters, but due to the change of the thermal conductivity of the mixed gas Thermal autoignition conditions have changed.