A pulsed plasma pyrolysis reactor with an efficient control system was designed for fuel oil processing. Non-thermal plasma pyrolysis was carried out in the liquid phase at low temperatures (not higher than 100 °C) in a 300 cm³ reactor without additional reagents or catalysts. The main process parameters and characteristics of non-thermal plasma fuel oil products were investigated within the DC source voltage range of 300–700 V. An increase in the energy of pulsed discharges led to an increase in the productivity of the plasma pyrolysis process and the yield of hydrogen but reduced the yield of acetylene and ethylene. The resulting gas consisted predominantly of hydrogen (46.5–50.0 mol%), acetylene (28.8–34.3 mol%), ethylene (7.6–8.6 mol%), methane (4.2–6.2 mol%), and C3–C5 hydrocarbons. The solid-phase products were in the form of disordered graphite and multilayer nanotubes.

The non-thermal plasma pyrolysis of fuel oil, under the action of low-voltage electric discharges in the liquid phase, has made it possible to develop a new process to obtain valuable petrochemical products. In this study, the main parameters, including pulse energy and the time of impact on the non-thermal plasma pyrolysis process, are studied. The main components of the obtained gaseous products are hydrogen (27.6–49.6 mol%), acetylene (33.6–49.1 mol%), ethylene (6.9–12.1 mol%), methane (3.9–9.1 mol%), and hydrocarbons C3-C5 (3.8–9.3 mol%). Increasing the capacity of electric discharges leads to an increase in the content of acetylene in the gas phase to 49.1 mol% and a decrease in energy costs for the production of gaseous products.

This article discusses magnetic vibrations in squirrel-cage induction motor stators and provides a mathematical description of the process of their excitation. A model of a 30 kW squirrel-cage induction motor was developed in finite element software. This model considers the motor geometry, material properties and stator winding. The electromagnetic and mechanical processes in the motor during the rotation of the rotor were considered. In the course of this study, currents of various harmonic compositions and amplitudes were applied to the motor windings, which caused magnetic noise, vibration and pulsations of the electromagnetic torque. Magnetic noises, vibrations and pulsations of the electromagnetic torque were investigated in the case of imbalance and harmonic distortions of the supply voltage.

This paper describes the scheme and algorithm for controlling a laboratory setup that result in low uncertainty and high convergence with respect to the characteristics of electric discharges under the conditions of variable parameters of a reaction medium. The article presents current and voltage oscillograms when processing hydrocarbon raw materials. Methods for calculating the energy impact of electrical discharge are described. A comparison is made between the parameters of electric discharge with current pulse limitations and those without current pulse duration limitations. The proposed approach to controlling the characteristics of electric discharges provides the same parameters of nonthermal nonequilibrium plasma and, as a result, a regular composition of the products of plasma pyrolysis of hydrocarbon raw materials.

Plasma chemical aquatermolysis of heavy oil feedstock allows increasing the depth of oil refining and the yield of light hydrocarbons. In the present work, the process of NTP-pyrolysis of a mixture of fuel oil with water (10 wt%) in the liquid phase at 700V was carried out. The introduction of water (10 wt%) into the fuel oil leads to changes in the conversion rate, product composition and energy consumption. Addition of 10 wt% of water to fuel oil increases the conversion rate from 18.6 to 25.9 wt% and reduces energy consumption. The main products are carbon materials, acetylene, ethylene and C3-C6 hydrocarbons.