Influence of the Adsorbed Hydrocarbons on Change of the Free Surface Energy of Solid Surfaces

About the authors:

Aleksandr S. Stepanov, Postgraduate Student, Department of Mechanics of Multiphase Systems, Institute of Physics and Technology, University of Tyumen; stepanovsanya45@mail.ru

Aleksandr A. Vakulin, Dr. Sci. (Tech.), Professor, Honorary Worker of Science and High Technologies of the Russian Federation, Professor of the Department of Applied and Technical Physics, Institute of Physics and Technology, University of Tyumen; a.a.vakulin@utmn.ru

Abstract:

Expansion of the fuel and energy complex associated with oil and gas extraction brings the issues of processing, cleaning, drying, and exporting of hydrocarbon raw materials to the fore. Oil and gas processing faces the problem of adsorption of hydrocarbons on a solid surface, which has a negative impact on production processes. The study of hydrocarbon adsorption is caused by practical problems, in particular, from the metrological assurance port of production. Indeed, the existing method of verification/calibration the gas analyzer signalers of GKPS17.41.00.000 RE configured for pre-explosive concentrations of hydrocarbon vapors (gasoline, diesel fuel) does not take into account the adsorption of gaseous matter on the walls of the verification/calibration plant to create control gas mixture (CGM) that leads to a systematic error/fault in the customizable measuring instruments.

The purpose of this study was the experimental determination of contact angles and free surface energies (FSE) of materials of the plants for the preparation of CGM. The paper describes the experimental plant for determining the contact angle (van Oss method) designed to determine the energy characteristics of the surfaces of solids, there are photographs of wetting of these surfaces by test liquids. Issues related to the change in FSE of solids are discussed. The results of experiments are presented and materials (alternative to currently used) are recommended by the authors for modernization of the verification/calibration device for gas analyzers to reduce the systematic error in the determination of the concentration of CGM.

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