【摘要】 根据F-T柴油的主要性质，提出了以摩尔浓度分别为94%和6%的正十二烷(NC₁₂H₂₆)和异辛烷(IC₈H₁₈)混合物作为F-T柴油的替代物。运用射流搅拌器（JSR）氧化平台与同步辐射真空紫外光电离质谱方法 （SVUV-PIMS），开展了F-T柴油替代物低温氧化实验。构建了F-T柴油的简化机理，分析了NC₁₂H₂₆与IC₈H₁₈的敏感性和氧化路径。结果表明，构建的简化机理对反应物的消耗和CH₄、C₃H₆等主要中间物质的生成具有良好的预测效果。在F-T柴油的氧化过程中，NC₁₂H₂₆增强了IC₈H₁₈的低温氧化活性，IC₈H₁₈减缓了NC₁₂H₂₆的低温反应速率。当氧化温度升高时，NC₁₂H₂₆的氢提取反应路径更加丰富，烷基自由基更容易通过解离反应生成小分子物质。更多还原

【Abstract】 According to the main properties of F-T diesel, the mixture of n-dodecane(NC₁₂H₂₆)and isooctane(IC₈H₁₈) with molar concentrations of 94% and 6% respectively is proposed as a surrogate for F-T diesel. The low temperature oxidation experiment of F-T diesel surrogate was carried out by using jet agitator（JSR） oxidation platform and synchrotron radiation vacuum ultraviolet photoionization mass spectrometry（SVUV-PIMS）. The reduced mechanism of F-T diesel is constructed the sensitivity and oxidation path of NC₁₂H₂₆and IC₈H₁₈were analyzed by using the mechanism. The results shows that the reduced mechanism has a good prediction effect on the reactants consumptions and the main intermediate substances formations such as CH₄ and C₃H₆.During the oxidation of F-T diesel, NC₁₂H₂₆enhances the low-temperature oxidation activity of IC₈H₁₈, and IC₈H₁₈slows down the low-temperature reaction rate of NC₁₂H₂₆. When the oxidation temperature increases, the hydrogen extraction reaction path of NC₁₂H₂₆is more abundant, and alkyl radicals are easier to form small molecules through dissociation reaction.更多还原