Combustion, performance and emission analysis of a DI diesel engine using plastic pyrolysis oil

Abstract

Plastic waste is an ideal source of energy due to its high heating value and abundance. It can be converted into oil through the pyrolysis process and utilised in internal combustion engines to produce power and heat. In the present work, plastic pyrolysis oil is manufactured via a fast pyrolysis process using a feedstock consisting of different types of plastic. The oil was analysed and it was found that its properties are similar to diesel fuel. The plastic pyrolysis oil was tested on a four-cylinder direct injection diesel engine running at various blends of plastic pyrolysis oil and diesel fuel from 0% to 100% at different engine loads from 25% to 100%. The engine combustion characteristics, performance and exhaust emissions were analysed and compared with diesel fuel operation. The results showed that the engine is able to run on plastic pyrolysis oil at high loads presenting similar performance to diesel while at lower loads the longer ignition delay period causes stability issues. The brake thermal efficiency for plastic pyrolysis oil at full load was slightly lower than diesel, but NOX emissions were considerably higher. The results suggested that the plastic pyrolysis oil is a promising alternative fuel for certain engine application at certain operation conditions

DC Thermal Plasma Design and Utilization for the Low Density Polyethylene to Diesel Oil Pyrolysis Reaction

“…Combustion of pyrolysis oils releases less CO 2 in comparison with LDPE incineration, with an average of 6 to 11.5% wt. % (i.e., 0.06-0.115 kg CO 2 /kg of combusted pyrolysis oil) depending on the engine load [19].…”

Prospect of Algal Biodiesel as a Fuel in Engine

“…The higher NOx emission for biodiesel was contributed to high oxygen content which completes the combustion phase lead to higher temperature of cylinder [23]. The latent heat of vaporization of fuel, iodine number, oxygen contents, viscosity, density and cetane number was attributed to variations of NO X emission [27][28][29]. The higher oxygen content, iodine number, density, viscosity, air fuel ratio and lower cetane number of fuel contributed to increased trend of NO X .…”

Assessment on performance and emission parameter of diesel engine using waste plastic oil used as a fuel

“…In any case, for same mixing proportion, unconsumed hydrocarbon diminishes with increment in load. The explanation behind increment in unconsumed hydrocarbon is due to higher aromatic content, low viscosity, higher density and cetane number in the plastic oil [5]. : variation of carbon dioxide with load Carbon dioxide being green house gas and that is the reason to reduce the carbon dioxide emissions.…”