采用热重分析仪研究了空气气氛中废弃医用外科口罩的热氧化降解特性,并运用3种无模型方法以及1种模型拟合方法进行了动力学和热力学分析。结果表明:废弃医用外科口罩在空气气氛中的热氧化降解是一种吸热的非自发反应,且整个热氧化降解...采用热重分析仪研究了空气气氛中废弃医用外科口罩的热氧化降解特性,并运用3种无模型方法以及1种模型拟合方法进行了动力学和热力学分析。结果表明:废弃医用外科口罩在空气气氛中的热氧化降解是一种吸热的非自发反应,且整个热氧化降解过程可被认为是单步反应。热氧化降解过程的活化能和指前因子的平均值分别为63.83 k J·mol^(-1)和1.27×10^(5) min^(-1),最概然反应模型为g(a)-[-ln(1-a)]^(2/3),所获得的动力学参数可用于较好地预测废弃医用外科口罩在空气中的热氧化降解行为。研究结果可以为预防废弃医用外科口罩可能引发的火灾事故提供参考。展开更多
As an important strategic reserve resource,the comprehensive development and utilization of Nanyishan oil-gas field brine will bring great economic and social value.Here,according to the composition characteristics of...As an important strategic reserve resource,the comprehensive development and utilization of Nanyishan oil-gas field brine will bring great economic and social value.Here,according to the composition characteristics of this oil-gas field brine being rich in lithium,potassium and strontium,the solid-liquid stable phase equilibria and phase diagrams of Li-containing quaternary system(LiBr-MgBr_(2)-SrBr_(2)-H_(2)O)and two quinary systems(LiBr-NaBr-MgBr_(2)-SrBr_(2)-H_(2)O and LiBr-KBr-MgBr_(2)-SrBr_(2)-H_(2)O)were studied at 298.15 K.Based on the results of phase equilibrium experimental research,the phase equilibrium relationship and crystallization-dissolution behavior of each component in liquid phase were revealed theoretically,and the changing trend was summarized.Using theoretical model of Pitzer electrolyte solution,the relevant interaction parameters of mixed ions at 298.15 K were obtained by fitting experimental data,and the solubility reaching equilibrium of various salts in above systems was calculated,and the experimental results were verified.The research results of this paper lay an important foundation for further theoretical study of multi-temperature phase equilibrium and thermodynamic properties of complex brine system in the later stage.Meanwhile,it provides basic thermodynamic data and theoretical guidance for the rational development and comprehensive utilization of this oil-gas field brine resources.展开更多
文摘采用热重分析仪研究了空气气氛中废弃医用外科口罩的热氧化降解特性,并运用3种无模型方法以及1种模型拟合方法进行了动力学和热力学分析。结果表明:废弃医用外科口罩在空气气氛中的热氧化降解是一种吸热的非自发反应,且整个热氧化降解过程可被认为是单步反应。热氧化降解过程的活化能和指前因子的平均值分别为63.83 k J·mol^(-1)和1.27×10^(5) min^(-1),最概然反应模型为g(a)-[-ln(1-a)]^(2/3),所获得的动力学参数可用于较好地预测废弃医用外科口罩在空气中的热氧化降解行为。研究结果可以为预防废弃医用外科口罩可能引发的火灾事故提供参考。
基金supported by the Natural Science Foundation of Qinghai Province(2024-ZJ-901).
文摘As an important strategic reserve resource,the comprehensive development and utilization of Nanyishan oil-gas field brine will bring great economic and social value.Here,according to the composition characteristics of this oil-gas field brine being rich in lithium,potassium and strontium,the solid-liquid stable phase equilibria and phase diagrams of Li-containing quaternary system(LiBr-MgBr_(2)-SrBr_(2)-H_(2)O)and two quinary systems(LiBr-NaBr-MgBr_(2)-SrBr_(2)-H_(2)O and LiBr-KBr-MgBr_(2)-SrBr_(2)-H_(2)O)were studied at 298.15 K.Based on the results of phase equilibrium experimental research,the phase equilibrium relationship and crystallization-dissolution behavior of each component in liquid phase were revealed theoretically,and the changing trend was summarized.Using theoretical model of Pitzer electrolyte solution,the relevant interaction parameters of mixed ions at 298.15 K were obtained by fitting experimental data,and the solubility reaching equilibrium of various salts in above systems was calculated,and the experimental results were verified.The research results of this paper lay an important foundation for further theoretical study of multi-temperature phase equilibrium and thermodynamic properties of complex brine system in the later stage.Meanwhile,it provides basic thermodynamic data and theoretical guidance for the rational development and comprehensive utilization of this oil-gas field brine resources.
