Study of Changes in the Performance Properties of MHD-20S Compressor Oil after Use in Gas-Powered Motor Compressors
Year: 2026
Type: article
Abstract: To ensure continuous and stable operation, Ukraine’s gas transmission system (GTS) needs to address the shortage of specialized lubricants, particularly MHD-20S oil for gas pumping equipment. The study aims to identify the degradation mechanisms of this oil during prolonged operation in gas-powered compressors to justify the possibility of its further regeneration or disposal. A comprehensive analysis using IR-spectroscopic, X-ray fluorescence, and derivatographic analysis allowed the evaluation of structural changes in the lubricant. It was found that during operation, a redistribution of the group composition occurs with the accumulation of aromatic compounds and asphaltene-resin substances, which leads to a decrease in the oil thermal stability and a significant change in its inorganic part. Using IR-spectroscopy, oxygen-containing products of thermal-oxidative aging were identified. A 41% increase in viscosity at 50 °C was recorded while viscosity at 100 °C remained stable. The results confirm that despite the accumulation of impurities, up to 80% of the hydrocarbon base remains unchanged. This demonstrates the technical feasibility of implementing local methods for the regeneration of used oils directly at compressor stations to ensure the energy security of the gas transmission system.
Source: Chemistry & Chemical Technology
Institution: Lviv Polytechnic National University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7224293147