Abstract
In this research work, N-Isopropyl-N-Phenyl-p-phenylenediamine (IPPD) and N,N′-Diphenyl-p-phenylenediamine (DPPD) are used as antioxidants for oxides of nitrogen (NOx) mitigation in a biodiesel-diesel blend run in a dual-fuelled compression (CI) engine. Five different antioxidant concentrations are selected for doping JME20, from 0 ppm to 2000 ppm at an interval of 500 ppm. A 4.4 kW rated power at 1500 rpm, four-stroke, single-cylinder, CI engine is modified to operate as a low heat rejection (LHR) engine. The LHR engine is formed by replacing the conventional piston with a YSZ + CeO2 thermal barrier coated (TBC) piston. The combined effects of the antioxidant-doped biodiesel-diesel blend with oxy-hydrogen gas (HHO) gas are experimentally investigated on the LHR engine to study engine combustion, performance, and emission characteristics. The dual-fuelled LHR engine's combustion and performance characteristics are enhanced with the help of hydrogen combustion as compared to diesel data. The results of the engine run on the antioxidant-doped biodiesel-diesel blend reveal that a 3.13%, 6.24%, and 9.8% reduction in BSEC, EGT and NO emissions, respectively are noticed with JME20D4+HHO operation compared to JME20+HHO operation.
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