【摘要】 通过热重分析法研究了微米Fe2O3和纳米Fe2O3对KClO3热分解的催化性能,用非等温热分析方法研究了纯KClO3、微米Fe2O3催化的和纳米Fe2O3催化的KClO3热分解机理。结果表明,微米Fe2O3和纳米Fe2O3对KClO3热分解均有催化作用,纳米Fe2O3的催化性能比微米Fe2O3的催化性能好,纯KClO3热分解由一维扩散动力学机理控制,活化能E=177.9 kJ/mol,指前因子A=6.3×107;微米Fe2O3催化的KClO3热分解,由三维扩散动力学机理控制,活化能E=118.0 kJ/mol,指前因子A=9.7×105;纳米Fe2O3催化的KClO3热分解,由二级化学反应动力学机理控制,活化能E=68.7 kJ/mol,指前因子A=6.2×104。更多还原

【Abstract】 The thermal decomposition of KClO₃ on nano-Fe₂O₃ on and micron-Fe₂O₃ catalysts was investigated by thermogravimetric analysis.Simultaneously,the non-isothermal thermal dynamics of thermal decomposition of pure KClO₃ on nano-Fe₂O₃ and micron-Fe₂O₃ catalysts was studied by non-isothermal thermal analysis method.The results indicated that the catalytic performance of nano-Fe₂O₃ is better than micron-Fe₂O₃.The thermal decomposition of pure KClO₃ is controlled by unidimensional diffusion dynamics.The apparent activation energy is 177.9 kJ/mol and the exponential coefficient is 6.3×10⁷.The thermal decomposition of KClO₃ catalyzed by micron-Fe₂O₃ is controlled by tridimensional diffusion dynamics.The apparent activation energy is 118.0 kJ/mol and the exponential coefficient is 9.7×10⁵.The thermal decomposition of KClO₃ catalyzed by nano-Fe₂O₃ consists of only one step which is controlled by the dynamics of a second-order chemical reaction.The apparent activation energy is 68.7 kJ/mol and the exponential coefficient is 6.2×10⁴.更多还原