The effect of triacetin as a fuel additive to waste cooking biodiesel on engine performance and exhaust emissions

Abstract

h i g h l i g h t sOxygen ratio was used instead of the equivalence ratio. Oxygen ratio decreases with engine load, but increases with engine speed. IMEP, BMEP, friction power, CO 2 , HC, PM and PN decreased with oxygenated fuels. BSFC, BTE and NOx increased with oxygenated fuels. Accumulation mode count median diameter decreased with oxygenated fuels. a b s t r a c tThis study investigates the effect of oxygenated fuels on engine performance and exhaust emission under a custom cycle using a fully instrumented 6-cylinder turbocharged diesel engine with a common rail injection system. A range of oxygenated fuels based on waste cooking biodiesel with triacetin as an oxygenated additive were studied. The oxygen ratio was used instead of the equivalence ratio, or air to fuel ratio, to better explain the phenomena observed during combustion. It was found that the increased oxygen ratio was associated with an increase in the friction mean effective pressure, brake specific fuel consumption, CO, HC and PN. On the other hand, mechanical efficiency, brake thermal efficiency, CO 2 , NOx and PM decreased with oxygen ratio. Increasing the oxygen content of the fuel was associated with a decrease in indicated power, brake power, indicated mean effective pressure, brake mean effective pressure, friction power, blow-by, CO 2 , CO (at higher loads), HC, PM and PN. On the other hand, the brake specific fuel consumption, brake thermal efficiency and NOx increased by using the oxygenated fuels. Also, by increasing the oxygen content, the accumulation mode count median diameter moved toward the smaller particle sizes. In addition to the oxygen content of fuel, the other physical and chemical properties of the fuels were used to interpret the behavior of the engine.

Efecto de la Adición de Biodiésel en el Rendimiento y la Opacidad de un Motor Diésel

“…El mayor par en la camioneta GW Wingle lo obtuvo el diésel a 2500 rpm con 268.99 Nm, los combustibles en mezcla a la misma revolución obtuvieron una disminución de torque de 2.37 y 4.50 % con mezcla B10 y B20 respectivamente. Kousoulidou et al, (2010) concluyó que la mezcla de biodiesel en diésel derivado del petróleo a 10% en volumen cambia las propiedades del combustible en un grado que puede afectar las características de combustión, como el inicio del encendido, además, Campaña et al, (2016) en sus resultados obtuvo que el diésel presentó un mayor par motor en comparación con el B10, lo que coincide con los resultados de la presente experimentación (Zare et al, 2016).…”

An Overview of the Production of Oxygenated Fuel Additives by Glycerol Etherification, Either with Isobutene or tert-Butyl Alcohol, over Heterogeneous Catalysts

“…Specifically, the influence exhibited by different catalytic processes and reaction conditions, as well as the characteristic of the catalysts on the values of conversion and yield to the desired products, have been compiled and discussed. In fact, several researches have evaluated the effects of glycerol-derived oxygenated fuel additives on diesel engines [32][33][34][35][36]. One of the most promising fuel additives, taking into account the cost of production, is a mixture of di-tert-Butyl glycerol ethers (DTBGs) and tri-tert-Butyl glycerol ether (TTBG), the so-called h-GTBE, obtained by the etherification reaction of glycerol, either with isobutene (IB) or with tert-Butyl alcohol (TBA).…”

Prospect of Algal Biodiesel as a Fuel in Engine

“…In performance test research founded that pure diesel with 0% oxygen contents has less BSFC as compared to oxygenates fuel. [19]. High density fuel causes rich mixture locally due to non-homogeneous mixture inside combustion chamber which attributes to increase BSFC [18].…”