物理化学学报2007，Vol.23Issue(9)：1316-1320,5.
柠檬酸镧催化双基推进剂的非等温热分解反应动力学
Nonisothermal Thermal Decomposition Reaction Kinetics of Double-base Propellant Catalyzed with Lanthanum Citrate
摘要
Abstract
The decomposition reaction kinetics of the double-base (DB) rocket propellant composed of the mixed ester of triethyleneglycol dinitrate (TEGDN) and nitroglycerin (NG), and nitrocellulose (NC) with lanthanum citrate as a combustion catalyst was investigated by thermogravimetry and differential thermogravimetry (TG-DTG), and differential scanning calorimetry (DSC) under atmospheric pressure and flowing nitrogen gas conditions. The results showed that the thermal decomposition processes of DB propellant had two mass loss stages: volatilization and decomposition of the mixed ester in the first-stage and exothermic decomposition reaction in the second-stage. The exothermic decomposition reaction mechanism obeyed the third-order chemical reaction rule. The kinetic parameters The critical temperatures of the thermal explosion of the DB propellant obtained from the onset temperature (Te) and the peak temperature (Tp) were: Tbe=463.62 K, Tbp=477.88 K. The entropy of activation (ΔS≠), enthalpy of activation (ΔH≠), and free energy of activation (ΔG≠) of the reaction were 219.75 J·mol-1·K-1, 239.23 kJ·mol-1, and 135.96 kJ·mol-1, respectively.关键词
双基推进剂/非等温反应动力学/柠檬酸镧/燃烧催化剂/二缩三乙二醇二硝酸酯/硝化甘油Key words
Double-base propellant/ Nonisothermal kinetics/ Lanthanum citrate/ Combustion catalyst/Triethyleneglycol dinitrate/ Nitroglycerin分类
化学化工引用本文复制引用
仪建华,赵凤起,徐司雨,高红旭,胡荣祖,郝海霞,裴庆,高茵..柠檬酸镧催化双基推进剂的非等温热分解反应动力学[J].物理化学学报,2007,23(9):1316-1320,5.基金项目
国家自然科学基金(20573098)和国防科技重点实验室基金(9140C3503020605)资助项目 （20573098）
