Thermodynamic simulation study on compression ignition engine operating with oil obtained via catalytic pyrolysis of waste polythene covers

• Published in: Sustainable Chemistry for Climate Action 2024-06, Vol.4, p.100041, Article 100041
• Main Authors: Nalluri, Premdasu, Premkumar, P., Sastry, M.R.Ch
• Format: Article
• Language: English
• Subjects: Catalytic pyrolysis; Exhaust gas recirculation; Fly ash catalyst; Waste plastic oil; Waste polythene covers
• ISSN: 2772-8269; 2772-8269
• DOI: 10.1016/j.scca.2024.100041

•Catalytic pyrolysis of plastic waste is an effective and economical solution to twin problem of environmental pollution due to pollution caused by waste plastic disposal and shortage of fossil fuels.•Waste plastic oil (WPO) emits more oxides of nitrogen compared to conventional diesel due to higher combustion temperatures.•Exhaust gas recirculation is the effective in-cylinder treatment however suffering from higher CO2 emissions and higher particulate matter.•Rosenbrok optimization technique is the promising method to optimize the engine emission characteristics without compromising the performance. In recent years, waste-to-energy systems are receiving more attention due to their dual benefit of reduction of pollution caused by waste materials and reducing the overconsumption of fossil fuels. Since plastic waste is readily available and has a high heating value, it is a viable source of energy.; plastic garbage makes an excellent source of energy. Today, a feedstock made up of several types of plastic is used to quickly pyrolyze and produce plastic pyrolysis oil (PPO) or waste plastic oil (WPO). The oil could be utilized in internal combustion engines to produce heat and power. In the current work, waste polythene covers were transformed into value added products by utilizing fly ash catalyst and oil obtained is examined for suitability to run in the diesel engine. In the primary phase simulation study is performed on a four-stroke single cylinder DI Compression ignition engine using Diesel-RK engine simulator, results indicated that, waste plastic oil was found to emit higher oxides of nitrogen compared to diesel therefore in the secondary phase the same engine simulated by implementing exhaust gas recirculation at 3.5 %,7 %,10.5 % and 14 % rates. In the end engine parameters get optimized using 3D parametric optimization technique. Simulation Results indicate that, performance parameters such as brake power, brake thermal efficiency and brake specific fuel consumption were found to be decreased slightly under EGR conditions. Furthermore, combustion parameters such as cylinder peak pressure and peak temperature decrease up on implementing the exhaust gas recirculation, similarly the emission characteristics such as CO2, PM and smoke found to be increase with increase in EGR ratio while oxides of nitrogen emissions significantly decreased under EGR conditions. In order to reduce the emissions further, a 3D parametric optimization technique was adopted a