Reduction of Emissions in Diesel Engine using Blended Diesel with Edible Bran Oil

Abstract Compare to the other internal combustion engines, the Diesel engine contributes a considerable part in air pollution; especially by emission of sulfur oxides (SOx) along with NOx, CO, and HC, those have a significant effect on the environment as well as on the human health. In concern to the fact, maintaining of the emissions out of diesel engines into the environment is mandatory; accordingly, a standard for emission regulation is set stringently from the BS-IV to BS-VI in this decade. Under this background, it is essential to look for an alternative method to reduce the emissions. Blending of biofuel with diesel is one of the suitable methods. On the track, most of the research works considered neem and jatropha oil as biofuel for blending. However, use of rice bran oil (RBO) is an interesting option, and rarely considered as a biofuel for the engines. In the present work, thus, the emission of pollutants and performance of a single cylinder Diesel engine with variable compression ratio (VCR) facility, made of Kirloskar, are investigated experimentally powered using blending of rice bran oil (0%, 15% and 30%) with diesel under three suitable compression ratios. It is observed, out of the experimental results, that the emission of major pollutants is less compare to using of pure diesel, together with almost same power output, which is a significant outcome of the research. This work recommends blending of the rice bran oil up to a limit of 30% in diesel and the engine is to be operated at moderate load.