Structural-Group Composition of Heavy Oil Conversion Products Using FTIR Spectroscopy

  • Ilmira M. Abdrafikova
Keywords: Petroleum, Composition, Asphaltenes, Conversion, Catalytic Transformations, Coke, FTIR Spectroscopy

Abstract

The decrease of oil production with its simultaneous
price increase and a growing demand for petroleum
products leads to the importance increase of heavy
hydrocarbon raw materials. The processing of heavy
petroleum raw materials in water vapor using oxide
type catalysts containing the metals of variable
valence is a promising trend, but there are some
problems for the study of liquid and solid conversion
products of such raw materials that differ from
traditional fractions of oil refining. There is the need
to choose an informative research method that
allows to analyze the structure and the composition
of the products obtained quickly and with great
accuracy. One of such methods is Fourier infrared
spectroscopy method, widely used to study the
structural-group composition of oil and petroleum
products, which allows to determine more precisely
the presence of certain functional groups in the
composition of the products under study as
compared to the chemical methods. Using Fourier
infrared spectroscopy method, they studied the
products of hydrothermal-catalytic conversion of
heavy oil in a water vapor medium and in the
presence of a natural hematite catalyst at the
temperatures of 210, 250 and 300 °C. The effect of
temperature and water content in the reaction
mixture on the yield and the composition of
experiment products is shown. Under of
hydrocarbons takes place due to the destruction of
high-molecular hydrocarbons, resins and
asphaltenes. It has been established that the increase
of temperature and the decrease of water content lead
to the increase of test product aromaticity and
oxidation degree with the development of insoluble
asphaltene and coke product fraction. The method of
Fourier infrared spectroscopy makes it possible to
fix changes in the composition of products with a
great accuracy and can serve as the control of heavy
hydrocarbon raw material processing.

Published
2017-12-31