THE IMPACT OF DIESEL AND VARIOUS BLENDS OF BIODIESEL ON PERFORMANCE, EMISSIONS, AND COMBUSTION IN DI DIESEL ENGINES

• Date: 2026
• Main Authors: Sekharraj , K., Balu, P., Giriprasath , A., Rathinasuriyan , C., Didkivska , H.
• Format: Article
• Language: English
• Published: Institute of Renewable Energy National Academy of Sciences of Ukraine 2026
• Subjects: diesel engine; biodiesels; performance; emissions; combustion; renewable energy.
• Online Access: https://ve.org.ua/index.php/journal/article/view/614
• Journal Title: Vidnovluvana energetika

The increasing demands for sustainable energy and stringent emission regulations have prompted the exploration of alternative fuels in internal combustion engines. This study investigates the effects of conventional diesel and various biodiesel blends on the performance, emission, and combustion characteristics of direct injection (DI) diesel engines. The study aims to identify the most suitable biodiesel blend that can serve as a viable alternative to conventional diesel fuel, providing high engine efficiency with reduced environmental impact. The rise in consumption, environmental emissions, and the cost of petrol make the energy recovery from trash a top priority. Not only can biodiesel meet energy demands, but it can also reduce greenhouse gas emissions, making it an important source of renewable energy. An experimental study of diesel and many different biodiesel blends was conducted to analyse their performance, emissions, and combustion characteristics. To prepare the emulsified fuel and go on with further experimental work, this effort aimed to identify the optimal biodiesel blends.  The results of this paper showed that among all other biodiesel blends with various compositions, Syzygy Cumini (SC) biodiesel 20% by volume with diesel (SC20) was the best mix. Based on the outcomes of performance, combustion, and emission metrics, it was selected. Overall, SC20 biodiesel was identified as the optimal blend, offering a promising balance between engine performance, combustion stability, and lower exhaust emissions, thus supporting its potential use in existing diesel engines without modifications.