Exhaust emission characteristics of various types of biofuels

Meeting the growing demand for sustainable energy is one of the major challenges of the 21st century. In the Kyoto conference on global climate change, numerous nations committed to large reductions in greenhouse gas emissions. Reduced greenhouse gas emissions are a major advantage of using biodiesel on diesel engines. The test uses three biodiesels (soybean oil, palm oil, and waste edible oil) in the engine, comparing engine performance and exhaust emissions with the baseline (pure petrodiesel) case. The results indicated that the use of biodiesel produces decreased smoke opacity but increased fuel consumption up to 7.38% compared with petrodiesel. Exhaust emissions, such as CO and HC, were reduced using biodiesel in fuels, primarily because of the effect of complete combustion of the oxygen contained in biodiesel