C5~C7烃类组分在Al2O3毛细管色谱柱上的分离及应用

详细研究了54种常见的C₅~C₇烃类组分在S型、KCl型和M型3种类型Al₂O₃毛细管色谱柱上的分离和定性,结果显示大部分C₅~C₇烃类组分在3种类型Al₂O₃毛细管色谱柱上的分离效果良好,但也存在一些组分分离不完全或共流出的现象,3种类型Al₂O₃毛细管色谱柱上的分离效果也存在一定的差异。共测定了15个C₅烃类组分,25个C₆烃类组分及14个C₇烃类组分在这3种类型Al₂O₃毛细管色谱柱上的线性程序升温保留指数,为C₅~C₇烃类组分在Al₂O₃毛细管色谱柱上的定性提供了依据。同时定量分析了某石化企业的裂解气样品中C₅~C₇烃类组分的含量。本研究拓展了Al₂O₃毛细管色谱柱的应用范围,可以为石化企业轻烃的分析提供参考。

Separation of C5-C7 hydrocarbon components on Al2O3 capillary column and its application

The separation and qualitative analysis of 54 common C₅-C₇ hydrocarbon components on three Al₂O₃ capillary columns, including S type, KCl type and M type, were investigated in detail. The results showed that the separation of the 54 C₅-C₇ hydrocarbon components were partly different on these three Al₂O₃ capillary columns, and the most of C₅-C₇ hydrocarbon components could be well separated, except that some of them couldn't achieve a baseline separation or co-eluted. Linear temperature programmed retention indices of the 54 C₅-C₇ hydrocarbon components, including 15 C₅ hydrocarbons, 25 C₆ hydrocarbons and 14 C₇ hydrocarbons, were determined on these three Al₂O₃ capillary columns. The determination of linear temperature programmed retention indices for these C₅-C₇ hydrocarbon components on Al₂O₃ capillary columns provided a basis for the qualitative analysis of them. At the same time, a real pyrolysis gas sample from one of the petrochemical plants was qualitatively analyzed according to the linear temperature programmed retention indices, and the contents of C₅-C₇ hydrocarbon components were determined. The application field of Al₂O₃ capillary column was expanded and it is helpful for the analysis of light hydrocarbons in petrochemical enterprises.