The effect of thermal degradation and thermogravimetric analysis on pyrolysis oil production from waste milk packet for CI engine application

• Published in: Journal of thermal analysis and calorimetry Vol. 147; no. 17; pp. 9677 - 9691
• Main Authors: Senthilkumar, P. B., Parthasarathy, M., Nagarajan, R., Murgunachiappan, N., Elumalai, P. V., Varaprasad, B. H.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-09-2022; Springer; Springer Nature B.V
• Subjects: Air quality management; Alternative energy sources; Analytical Chemistry; Biodiesel fuels; Calorific value; Carbon monoxide; Chemistry; Chemistry and Materials Science; Combustion; Dairy industry; Diesel fuels; Emission analysis; Emissions; Emissions control; Energy minerals; Fossil fuels; Gas chromatography; Inorganic Chemistry; Internal combustion engines; Mass spectrometry; Measurement Science and Instrumentation; Milk; Peak load; Physical Chemistry; Polymer blends; Polymer Sciences; Production data; Pyrolysis; Recycling (Waste, etc.); Renewable energy sources; Thermal degradation; Thermodynamic efficiency; Thermogravimetric analysis; Waste management; Emission; Waste milk packets; Thermogravimetric analysis; Performance; Waste plastic pyrolysis oil
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-022-11226-6

Fossil fuels are non-renewable energy sources that are continuously depleting while also causing major environmental issues, which has led to the usage of alternative methods in conventional engines for better performance and emissions. Plastic is a non-degradable waste material, and recycling of waste plastic has gained much importance as the alternative source of energy, and it can be induced to the internal combustion engine to produce power generation and propulsion. The waste plastic oil (WPO) was extracted from the waste milk packet by using the pyrolysis method. The properties of pyrolysis fuel are tested and compared with conventional diesel fuel. WPO has a closer calorific value than neat diesel fuel which has higher density and viscosity. The present study also analyzed the aromatic components which are present in pyrolysis oil by using gas chromatography–mass spectrometry analysis. The experiments were conducted on a four-stroke, single-cylinder, direct injection, CI engine of 5.2 kW at 1500 rpm. The various combinations and different blends used in this study are pure diesel, waste plastic oil 20% + diesel 80% (D80WPO20), waste plastic oil 40% + diesel 60% (D60WPO40) and waste plastic oil 60% + diesel 40% (D40WPO60). The experimental results observed that an increase in the percentage of biodiesel in the blend gradually reduces the thermal efficiency and global emissions (HC and CO). From the investigation, it was revealed that brake power was increased from 0 to 65% and HC emission linearly reduced for all the test fuels. Moreover, CO emission was a similar trend of HC emission at all load conditions for the WPO blends. The test results also showed that BTE of D80WPO20 was slightly lower than the conventional diesel fuel. The percentage of decrement in HC, CO and smoke emissions were 4.34, 2.35 and 7.1% when compared to diesel at peak load condition, but penalty showed that there was 15.29% increment in NO
x
emission. Based on the results, it was concluded that D80WPO20 was chosen as optimum blend and promising replacement of fossil diesel fuel.