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Influence of water on exhaust emissions on unmodified diesel engine propelled with biodiesel

ABSTRACT The present work aims to investigate the effect of water addition to orange peel oil biodiesel (BD100) in a diesel engine to reduce the exhaust emissions. Fuel samples are prepared with different concentrations of water into biodiesel, 95% biodiesel + 5% water (BD95W5) and 90% orange peel oil biodiesel + 10% water (BD90W10). The water is added to biodiesel in presence of surfactant (Span-80). The experimental investigation on diesel engine reveals that the oxides of nitrogen emission and smoke emission are reduced for BD95W5 and BD90W10 compared to BD100 and diesel. In addition, the introduction of water to biodiesel in diesel engine reduces the carbon monoxide and hydrocarbon emissions noticeably.