Engineering Research Equipment Grant: Advanced Gas Chromatography System with Multidimensional Capabilities

从类燃料碳氢化合物的氧化中分离中间体和产物的复杂分析问题需要复杂的色谱技术。提供这些功能的两种互补方法是毛细管柱和计算机控制的程序化阀门开关，也称为多维或“心脏切割”分析。虽然毛细管柱本身比填充柱提供更高的分辨率，但它们还不足以分离非常复杂的烷烃、烯烃和含氧化合物的混合物。因此，为了实现分离，通常需要使用多个色谱柱，这些色谱柱在分析过程中可以切换到载流和出载流。进一步的分离通常是通过在柱中保持选定的气体样品的馏分，并将部分样品反冲洗到第二个分析柱中来实现的。这种技术被称为“多维”气相色谱法。指定的系统将允许实施复杂的分离技术，这是燃烧和燃料研究小组正在进行的几个研究项目所需要的。要求增强型气相色谱鉴定/分析系统，以取代和升级在燃烧过程以及发动机和燃料技术领域进行研究的现有能力。提出的系统允许多维分析能力，这是必不可少的，在分析更多的类似燃料的碳氢化合物，碳数大于或等于5。

The complex analytical problems of separating the intermediates and products from the oxidation of fuel-like hydrocarbons require sophisticated chromatographic techniques. Two complementary methodologies to provide these capabilities are capillary columns and computer controlled, programmed valve switching, also called multi-dimensional or "heart cutting" analysis. While capillary columns by themselves provide increased resolution over packed columns, they have not been sufficient to separate very complicated mixtures of alkanes, olefins, and oxygenates. Therefore to achieve separation, it is often necessary to use multiple columns which are switched into and out of the carrier flow during an analysis. Further separation is often achieved by holding selected fractions of the gas sample in a column and backflushing this partial sample into a second analytical column. This technique is called "multi-dimensional" gas chromatography. The system specified will allow implementation of sophisticated separation techniques, which are required for several ongoing research projects of the Combustion and Fuels Research Group. An enhanced gas chromatography identification/analysis system is requested to replace and upgrade existing capabilities for conducting research in the combustion processes and engine and fuels technology areas. The proposed system allows multi- dimensional analysis capabilities, which are essential in the analysis of more fuel-like hydrocarbons which have carbon numbers greater than or equal to five.