Determination of Olefin Content in
Gasoline
The emergence of smog has made people pay more attention to the protection of the
atmospheric environment. Although the cause of smog is complicated, it is certain that
motor vehicle is one of the major pollutant manufacturers. The olefin content in gasoline
is one of the important indicators for the quality control of gasoline. In order to minimize
environmental pollution, improving the quality standard of gasoline and diesel is an
objective requirement and an inevitable measure for controlling automobile exhaust
pollution. Although olefins in gasoline are high octane components, they are prone to
gels and deposits during storage and combustion. In addition, olefins are exposed to
ultraviolet rays from the sun to form ozone-based toxic photochemical smog. Therefore, it
is important to have an in-depth understanding of olefinic compounds in gasoline, which
can not only provide reference for process catalyst research and production process, but
also an important means to measure the quality of gasoline.
Fluorescent Indicator Adsorption Method
Fluorescent indicator adsorption (FIA) is a classic liquid-solid adsorption chromatography
method for determining the total amount of olefins in gasoline fractions. The method uses
a specific size silica gel adsorption column to separate alkane, olefin and aromatics from
gasoline, uses a fluorescent indicator to indicate the separation interface, and calculates
the volume fraction of each hydrocarbon by the length of the region occupied by the
different components on the silica gel column.
Multidimensional Gas Chromatography
Multi-dimensional gas chromatography (MGC) is based on the principle of
chromatographic separation. It uses multiple columns of different polarities and combines
valve switching technology to separate different components in gasoline to obtain sample
composition information. AC Corporation of the Netherlands has commercialized
multidimensional gas chromatography for the analysis of ol