Abstract
•Microwave assisted pyrolysis oil has been tested in the diesel engine.•Pyrolysis oil tested for performance and emission characteristics.•Increased concentration of the waste pyrolysis oil reduces the engine performance.•No sign of superior reduction in the NOx emissions.
The fossil fuel crisis can be effectively tackled by the use of alternative fuels. Among the variety of biofuels, production of the biodiesel from the plastic waste seems much more attractive. Conversion of plastic waste into sustainable biodiesel plays a major role in combating the serious concern over the depletion of fossil fuels. The current research paper deals and explores the production of biodiesel from pyrolysis and transesterification method. Further the procured biodiesel was tested for performance and emission characteristics by varying the engines load. Microwave assisted pyrolysis process has been used to for obtaining the bio-oil from the plastic waste. All experimental tests were conducted in a naturally aspirated-inline, direct injection diesel engine at different engine speeds at constant load condition. The performance of the engine measured via Brake Power (BP), Brake Torque (BT), Brake Thermal Efficiency (BTE) and the emission are calculated via Carbon monoxide (CO), Carbon dioxide (CO2) and Nitrogen oxide (NO). Each test blends WPO10, WPO20 and WPO30 were tested for the above parameters at the engine speed of 1000 rpm to 3000 rpm. All the procured results were comparatively examined with neat diesel. From the results, it is found that the brake power, brake torque and brake thermal efficiency were little lower for all taken blends compared to pure diesel. However, the major problem of emitting CO was considerably reduced while using plastic fuel blends. The CO2 and NO emission were increased. There is no evidence of increase in the thermal efficiency due to the lower calorific value of the pyrolysis oil. Further, the viscosity and the poor presence of oxygen molecules reduced the overall combustion process which leads to high emission rates.