Research On Gasoline Component Analysis By Using Multi-dimensional Chromatography

For the improvement of gasoline quality monitoring, the paper had studiedmultidimensional chromatograph, and two kinds of analysis model were established, PIONAand PHONA, which were based on foreign advanced new formula gasoline analyzer. Thesystematic analysis of influence factors were carried out. Compared with the FIA currentstandard, the results are as follows:It is good to use multidimensional chromatography analysis model PIONA if the olefincontent under20%(volume fraction), the results of the analysis not only in good consistencywith the FIA standard analysis method and give large amount of information, it is favorablefor production monitoring and scientific researchï¼›Multidimensional chromatography modelPHONA is suitable for the analysis of domestic gasoline sample of the high olefin content,whose unique binary adsorption method can take care of olefins and ensure no heavysaturated hydrocarbon adsorption for reducing misjudgment.Multidimensional chromatography has very good repeatability, the difference is in thepermissible error range of the confidence level. The applicability of the method is wide, andmore automatic. The average molecular weight of gasoline, density and C/H ratio can becalculated by using little gasoline sample.The following influence factor should be specified and determined: the property ofOlefin adsorption trap, the temperature of Olefin adsorption trap, the volume of sample, theseparation temperature of alcohol/ether Olefin adsorption trap, the separation temperature of5A molecular sieve, the Valve switch time.