MOTOR PROPERTIES OF ALTERNATIVE FUELS, OBTAINED BY PROCESSING OF WASTE POLYMERS

The main objective of this paper is to evaluate the efficiency of a rational technology for converting thermoplastic polymer waste into motor fuels. The implementation of this technology would enable the utilization of previously untapped resources within the energy balance and provide an environmentally friendly method for disposing of such waste. Currently, the development of alternative motor fuels represents one viable approach to addressing the growing demand for energy in both transport and stationary power generation. Thermoplastic polymer waste is one of the potential feedstocks for this process. Compared to crude oil, this material offers several significant advantages, including a negligible content of sulfur, vanadium, heavy hydrocarbons, resins, naphthenic acids, and other undesirable components. This paper examines the key performance characteristics of alternative fuels derived from thermoplastic polymer waste. It has been established that, through the selection of an optimal technological process and purification scheme, it is possible to produce gasoline, diesel, heavy diesel, and boiler fuels. Moreover, by adjusting the processing parameters, the output can be optimized to favor the production of specific fuel types. The study demonstrates that the physicochemical properties of these fuels allow for their use in thermal engines without the need for major modifications to engine design or fuel systems. A schematic diagram of the technological process for producing alternative fuel from plastic waste is presented, along with data on the resulting fuel yields and motor properties. The findings indicate that, with appropriate technological parameters, the properties of these alternative fuels can closely resemble those of conventional fuels. Indicator diagrams for the 6Ch12/14 engine operating on both standard and alternative diesel fuels are provided. The analysis includes in-cylinder pressure levels, specific effective fuel consumption, carbon monoxide (CO) and nitrogen oxide (NOx) emissions, and the rate of pressure rise (dP/dφ) during combustion. The results confirm that the use of the proposed alternative fuel does not necessitate significant modifications to engine design; appropriate adjustment of the fuel system is sufficient to ensure acceptable performance. In conclusion, the study supports the potential for the effective use of fuels derived from thermoplastic polymer waste from both an energy and environmental standpoint.