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This study examines the effect of concentration and flow-rate of CeO2 nano-fluid to reduce smoke emissions from a diesel engine. Taguchi-Grey relational-based multi-response optimization method was employed for test-plan. Results revealed that nano-fluid flow-rate and its concentration have a positive impact on smoke emissions reduction in a diesel engine. It is confirmed that the results obtained in the experimentations are in line with the calculated values obtained Taguchi technique. The usage of nano-fluid in the tailpipe is an effective way of reducing Smoke emissions from a diesel engine. [ABSTRACT FROM AUTHOR]

This study examines the prospect of utilizing biodiesel from non-edible, waste seed derived from grapefruit. The prepared biodiesel was intended to replace the diesel fuel in a research diesel engine. Two antioxidants namely BHA (Butylated Hydroxyanisole) and BHT (Butylated Hydroxytoluene) are partially blended to enhance the ignition patterns of diesel/biodiesel blends. 30% volume of grape-seed biodiesel (BD) is blended with 70% volume of diesel and identified as base fuel. 10% volume of two antioxidants is equally blended to base fuel to enhance its physic-chemical properties. Upon blending the antioxidants, no change in phase was observed for base fuel. Performance results found that BHA and BHT addition lowered 1.2–1.4% of BSFC, and improved 0.7–1.1% of BTE of diesel/biodiesel blends respectively. Besides, BHA and BHT inclusion improved the physio-chemical properties of diesel/biodiesel blends and produced a prominent increase in In-Cylinder Pressure (ICP) and heat release rate (HRR). Emissions results revealed that BHA and BHT addition lowered 1.8–2.1%% of CO, 2.2–2.6% of HC of diesel/biodiesel blends. Further, a higher cetane number of BHA and BHT improved the combustion and lowered smoke (2.9–3.4%) and NO (1.9–3.7%) emission for diesel/biodiesel blends. [ABSTRACT FROM AUTHOR]

This study is aimed at reducing NOx, Smoke, HC, CO emissions from single-cylinder, four-stroke, and water cooled diesel engine. The research engine is fueled with diesel and two blends of butanol and diesel at atmospheric conditions. Neat diesel is termed as D100, 10%, and 20% Volume of butanol dispersed in D100 is termed as D90B10 and D80B20 respectively. The chemical and physical properties of D100, D90B10 and D80B20 fall within the limits of ASTM standards. Results revealed that enhanced chemical properties and higher latent heat of vaporization of butanol lowered the CO, HC, smoke, and NOX emissions of diesel fueled research diesel engine. [ABSTRACT FROM AUTHOR]

This work examines the effect of butanol as an oxygenated additive to lower carbon monoxide, smoke, nitrogen oxide and hydrocarbon emissions and to improve the performance aspects of Calophyllum inophyllum (Punnai) biodiesel. Single-cylinder, oil-cooled compression ignition engines are employed in this work. Neat Punnai biodiesel (P100) is blended with butanol at 10% and 20% by volume and labelled as B10P90 and B20P80, respectively. Methanol and alkaline catalyst (KOH) were used for the transesterification process for biodiesel production. The transesterification technique yielded 88% biodiesel from raw Punnai oil. Engine tests resulted in lower CO, smoke, NOx and HC emissions when fuelled with both butanol blends when compared to P100. In addition, BSFC (brake-specific fuel consumption) reduced and BTE (brake thermal efficiency) increased with the inclusion of butanol blends (B10 and B20) to neat Punnai biodiesel. [ABSTRACT FROM AUTHOR]

In this study, neat biodiesel with octanol additive was employed in a diesel engine and its effects on engine emission were studied. The five fuels evaluated were neat palm kernal oil biodiesel, octanol blended with biodiesel by 10%, 20%, and 30% volume, and diesel. All the emissions are reduced by the addition of octanol in biodiesel in all loads owing to the higher oxygen concentration of air/fuel mixtures and improved atomization. Hence, it is concluded that the neat biodiesel and octanol blends can be employed as an alternative fuel for existing unmodified diesel engines owing to its lesser emission characteristics. [ABSTRACT FROM PUBLISHER]

The objective of this work is to boost the performance characteristics, and to reduce emissions from neem biodiesel (BD100), and to explore the option of direct use of neat BD100 in a diesel engine. The biodiesel concentrations were maintained at 90 and 80% where the volumes of decanol were 10, 20%. This work revealed that the increase in decanol concentration was followed by the reduction in fuel consumption (0.9%) as well as the enhancement in thermal efficiency (0.5%) inside the engine. Smoke (3.2%), HC (2.4%) and CO (4.8%) level reduced with a consequence of minor higher NO X (4.3%) emissions than diesel. Additionally, Combustion front such as Heat release rate (HRR) and the peak pressure increased with decanol content for neem biodiesel. This study discloses that 80% of neem biodiesel and 20% of Decanol can enhance the diesel engine combustion, performance and emissions with no alterations. [ABSTRACT FROM AUTHOR]