Performance, combustion and emission characteristics of a single cylinder CI engine running on diesel-biodiesel-water emulsion with additive

Abstract

ABSTRACTThe various researches on biodiesel and its blends as a fuel in a CI engine resulted in higher NOx emissions compared to diesel operation. The main objective of this study is to overcome the negative aspect of significant NOx emission than HC and CO emissions in the biodiesel blended fuel by the addition of water. The water emulsion has been used in diesel engine combustion for a long time showed encouraging results, but the point of efficiency and NOx trade-off, which is a highly challenging task for diesel engines. The objective of this study was achieved through the new blend consists of diesel- biodiesel blend (80:20 by volume), water (5% by volume), span-80 surfactant (1% by volume) and Cetane enhancing additive of Di-tertiary butyl peroxide (0.5% by volume). The chosen blend was tried in this study is unexplored. The new blend is designated as B3. Neem oil biodiesel was prepared through transesterification process. This study is to investigate the performance and emission characteristics of a single-cylinder diesel engine running on B3 fuel. The results of B3 fuel were compared with diesel (D), diesel-biodiesel blend (B1) and diesel-biodiesel with water emulsion through surfactant (B2). The conclusion reveals that B3 fuel has shown better performance intern of 17% decrease in specific energy consumption and reduction in HC and CO emissions especially NOx emission was reduced up to 29% and 45% than diesel fuel and B1 fuel respectively.