Noise and Exhaust Emission Characteristic of a Diesel Engine Fuelled with Natural Gas and Blends of Biodiesel and Diesel Fuels

Abstract

High energy demand of modern society has led to environmental pollution which has become one of the biggest problems for almost all living. Therefore, the effect of energy sources on emissions has been investigated by researchers for decades. In this research, the effect of natural gas and biodiesel which was produced from corn oil on emissions of a diesel engine was experimentally investigated. In engine experiments, natural gas used at the engine as a secondary fuel while low sulphur diesel fuel and its blend with corn biodiesel (20% and 40% by volume) was used as a primary fuel. According to results, compared to low sulphur diesel fuel, both natural gas and biodiesel usage improved the noise emission that distributed from the diesel engine. Biodiesel blends resulted in lower CO emission of 4,05% and 7,63% for CoB20 and CoB40, respectively, whereas introduction of natural gas caused significant rise of the emission. However, increment of CO2 emission caused by biodiesel addition into low sulphur diesel fuel was well compensated by the addition of natural gas. Moreover, 4,08%, 18,00% increment of NOx emissions that caused by CoB20 and CoB40 usage was also compensated up to 33,0% by the introduction of natural gas.