Identifier: TFG:1670
Authors: Edo Muñoz, Sílvia
Abstract:
This work has been done at the Repsol Petroleum refinery in Tarragona, specifically, in the gas room of the laboratory where samples are analyzed using chromatographic techniques. Petrochemical industries are devoted to refine and transform crude petroleum, to obtain products of great value, one of these products are gasolines. These are obtained from fractional distillation of crude oil and thanks to physical and chemical processes; they acquire the necessary characteristics to be marketed. In order to verify physical and chemical parameters or the composition of the products, the refinery has an analysis laboratory. This laboratory determines and ensures that the products comply with the quality specifications requested, following the approach established by international standards. One analysis that is carried out in the laboratory for gasoline is the determination of its composition using a multidimensional GC. This instrument allows separating each group of hydrocarbons and at the same time, within each group, separating the different compounds according to their carbon numbers. The purpose of this work is to determine the accuracy of the analytical method, which is used to identify and quantify gasoline, and to compare these results with those established by international standard EN ISO 22854. Also, it determines the veracity of the method by comparing the values obtained with the accepted values of reference. Two samples were used, one is a gasoline of an interlaboratory test and the other is a gasoline used to verify the equipment. For the results that are obtained, different statistical tests are applied to achieve the aim proposed. Thanks to these tests, it is concluded that the analytical method is accurate but not truthful, and therefore, it is not exact.
Repositori URV