Effect of Biodiesel Blend on Exhaust Emission and Engine Performance of Diesel Dual Fuel Engine

In this study, four main types of fuel such as pure Diesel, Biodiesel, Diesel Dual Fuel (DDF), and Biodiesel with DDF were employed to obtain the comparison of the engine performance and emission parameter. The use of compressed natural gas (CNG) in diesel engines can be considered as one of the optimum alternative solution for reducing fuel consumption rate. CNG can partly replace diesel fuel in the combustion chamber, while the remaining diesel is used as a testing fuel. The biodiesel employed in this research was extracted from waste cooking oil which was provided by Forest Research Institute of Malaysia (FRIM). The results of the engine tests showed that an increase in biodiesel percentage in the testing fuel compound resulting in the reduction of the engine power. Biodiesel used with CNG (B20-DDF) showed a better result of engine torque compared to other types of fuel tested. It was recorded from this particular work research that, when the composition of the biodiesel in the fuel increased, the inherent biodiesel properties like NOx emissions seemed to decrease; however, unburnt hydrocarbon (HC) was found to increase due to incomplete combustion of biodiesel fuel compound