高效可逆吸附测定含烯汽油族组成的气相色谱法研究  

Analysis of Saturates, Olefines and Aromatics in Gasoline with Gas Chromatography

作　　者：由源鹤[1] 金珂[1] 

机构地区：[1]石油化工科学研究院

出　　处：《色谱》1996年第5期379-380,共2页Chinese Journal of Chromatography

摘　　要：在研制成功高效烯烃可逆吸附剂ＡＤ－１的基础上，开发了一套适于日常分析的高稳定性专用ＳＯＡ分析系统和相应的分析方法。分析样品时，样品先进入极性分析柱（ＣＯＬ．１），芳烃留在柱中，烯烃与烷烃继续进入可逆吸附柱（ＣＯＬ．２）。烯烃被吸附，烷烃进入检测器，待饱和烃全部流出后，切换十通阀反吹芳烃，待芳烃完全流出后再将十通阀切换回进样状态，同时将吸附柱升温至２００℃，使烯烃脱附出来，利用积分仪以面积归一法计算出样品中的饱和烃（Ｓ）、芳烃（Ａ）及烯烃（Ｏ）的含量。至此完成一次样品分析。Saturates(S), olefines(O) and aromatics(A) in gasoline up to a boiling point of 200℃ can be determined quickly in one run by GC based on a research for a high-performance reversible olefine trap. This analytical system is equipped with two columns and a column switching valve. The flow scheme is illustrated in Fig. 1. The sample at first passes into a polar CEF column (COL. 1) in which saturates and olefines are eluted while aromatics is retained. Olefines and saturates pass through an AD-l column (COL. 2) where olefines are adsorbed at lower temperature (80℃), and saturates are detected as a single peak. Then the valve is switched to backflush the aromatics. After all of the aromatics are eluted from the polar CEF column, the valve is switched back to its original position and the AD-1 column is heated up to 200℃. Olefines are then eluted as a single peak. The total-analysis time is less than 30 min. Fig. 2 is a typical chromatogram for such analysis. Due to the fact that AD-1 adsorbent has high thermostability, adsorptive power and desorption efficiency(>98%), both accuracy and reproducibility are good enough for the routine analysis. Under the operating conditions the lifetime of AD-1 column can reach 400 sample injections.

关 键 词：气相色谱法 汽油 SOA族组成分析 

分 类 号：TE622.14[石油与天然气工程—油气加工工程] TE626.21