NOx and HC Emissions Reduction from a Diesel Engine Fuelled with Various Biodiesel Blends- A Review

Biodiesel is a clean, renewable and environmentally friendly fuel, derived from various feedstock’s like: edible and non-edible oils. Moving towards renewable energy sources, to overcome the problems of rising fossil fuel price, increasing dependency on foreign energy sources, and environmental concerns. We use the biodiesel blends as B20 (20% biodiesel and 80% diesel) because B20 blend shows as comparative properties as diesel .In this review work we study the effect of various biodiesel blends like: Palm biodiesel blend (PB20), Calophyllum inophyllum biodiesel blend (CIB20), Jatropha biodiesel blend (JB20), Karanja biodiesel blend (KB20), Microalgae biodiesel blend (MGB20), Mahua biodiesel blend (MB20) and diesel on diesel engine performance characteristics in term of brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE), emissions characteristics as NOx, CO, HC emission and smoke intensity, compared to diesel. We can concluded that MGB20 blend having the highest BTE and lower BSFC of among all blends. Diesel produce minimum NOx emission compared to biodiesel blends. NOx emission is reduce by 13.33, 33.33, 26.67, 43.33 and 50% for MGB20 when compared to CIB20, JB20, PB20, MB20 and KB20 blends and increase by 15.38% when compared to diesel. So MGB20 biodiesel blend can be used in diesel engine without any modifications in diesel engine if NOx and HC emissions are the main criteria.