Effect of primary and secondary alcohols as oxygenated additives on the performance and emission characteristics of diesel engine (original) (raw)
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Effect of Alcohol Additives on Diesel Engine Performance and Emissions
Alcohols have been used as an additive to diesel fuel. Two methods of alcohol addition have been considered: blending and fumigation. The effects of both methods on the performance and emissions of diesel engine have been studied and compared. The analysis was based on the fuel injection and combustion characteristics derived from indicator diagrams. The pros and cons of both methods have been emphasized and the recommendations of their application provided.
Emission study of a diesel engine fueled with higher alcohol-biodiesel blended fuels
International Journal of Green Energy, 2019
This work examines the effect of butanol (higher alcohol) on the emission pattern of neat neem oil biodiesel (NBD100) fueled diesel engine. Single-cylinder, 4-stroke, research diesel engine was employed to conduct the trial. Blends comprising the mixture of biodiesel and higher alcohol were prepared by employing an ultrasonic agitator. Four test fuels such as neat neem oil biodiesel, diesel, and two blends of higher alcohol/neem oil biodiesel: 10% and 20% (by volume). Experimental result showed that increasing alcohol content to biodiesel brought down the various emissions such as Smoke, NO x , HC, and CO by 6.8%, 10.4%, 8.6%, and 5.9%, respectively, at all loads. It was also concluded from the trail that a 20% higher alcohol/neem oil biodiesel blends show the promising signs in reducing all the emissions associated with biodiesel fuelled diesel engine.
1st INTERNATIONAL ENGINEERING AND TECHNOLOGY SYMPOSIUM, 2018
In this study, was experimentally investigated the effect on diesel engine performance and exhaust emissions of different fuel and blends. In study, D2 (standart diesel), B5 (%95 diesel+ %5 biodiesel), B5B10 (%90 B5+%10 n-butanol) and B5B20 (%80 B5+%20 n-butanol) fuels were tested under different engine load (25%. 50%. 75% and 100%). Test results showed that the incrtease rate n-butanol within B5 fuel decrease of engine power and an increase of spesific fuel consumption. In addition, the emission results also showed that the increase of n-Butanol ratio in B5 fuel led to an increase in HC and NOx emissions and a decrease in CO and soot emissions.
Effective application of ethanol in diesel engines
International Journal of Green Energy, 2017
This work aimed to prove the effects of adding different proportions of ethanol with diesel (DE) and ethanol-water mixture with diesel (DEW) in a single cylinder diesel engine on the performance, emissions and combustion parameters. The blends were stabilized by Tetra Methyl Ammonium Bromide as additive. The study was conducted at two operating conditions initially on normal diesel engine and in the second case the engine piston, valves and cylinder head coated with Zirconia Alumina. Results showed that addition of 10% ethanol with diesel performing almost equivalent to neat diesel with 29.2% BTE and 17.7% decrease in smoke and 11.4% increase in NOx emission at peak load than those of base fuel. Modified engine with thermal barrier coating performed superior than the normal engine with 4% and 5.5% increase in BTE respectively for DE and DEW type fuels with reduced exhaust emissions. 5% addition of water with diesel-ethanol blends favor higher proportion of ethanol to be employed in diesel engine.
2012
Fossil fuels play a crucial role in the world energy market. The world's energy market worth around 1.5 trillion dollars is still dominated by fossil fuels. The World Energy Outlook (WEO) claims that energy generated from fossil fuels will remain the major source and is still expected to meet about 84% of energy demand in 2030. As population increases and the standard of living improve, there will be a shortage of source of energy. Bio-fuel such as bio-diesel and bio-ethanol are now receiving the impetus required for becoming the fuel source for the future. One of the way to reduced the dependence on the fossil fuel is the blending of bio-ethanol with the conventional diesel. Advances in technology have allowed development of alternative energy sources. In this review paper we briefly discuss replacement of fossil fuel with bio-diesel+ bio-ethanol+ diesel and its effect on the engine performance and emission characteristics.
h i g h l i g h t s Modeling of engine performance by applying the statistical technique. Rigorous optimization of additives-diesel fuel formulation. Model verification and accuracy analysis based on performance factors. Decrease of soot emission and increase of engine performance. a b s t r a c t In this study, the effect of ethanol-diesel blends with different types of additives on performance and exhaust emission is experimentally investigated through experimental modeling and optimization methods. Experiments are performed on a turbocharged common rail direct injection (CRDI) engine. The mod-eling is used to optimize the emission, engine performance, and physico-chemical properties by implementing factorial design considering four main parameters, namely, choice of oxygenate and nitro-genate such as Nitroethane (NE), Nitromethane (NM) and 2-methoxy ethyl ether (MXEE) and metal additives such as Manganese (MN) and Cerium (CE), engine speed (2200 and 1500 rpm) and load (370, 275, 180 and 20 N m). Findings by modeling show that the quadric and cubic terms of these four variables had significant effects. The obtained results prove that using the diesel-ethanol-(NE + MN) is better to decrease soot emissions and increase cetane number. The properties under study were cetane number and viscosity experiment. The emissions decrease with increasing the engine speed. The effect of blending (MXEE + CE) with diesel-ethanol on improvement of the engine performance is higher than other additives. The optimal conditions are found to be the NE, MN, engine speed and load of 1500 rpm and 168 N m, respectively. Under these conditions, the model estimated the soot content, formation of NO x and CO 2 , brake specific fuel consumption (BSFC) and powers of 27.6, 441.3, 28.1 ppm, 224.2 g/kW h and 26.5 kw, respectively. The modeling techniques and developed models can be employed as a useful tool for design and optimization of appropriate ethanol-diesel fuels with effective performance for various industrial applications.
Energy Conversion and Management, 2008
An experimental investigation is conducted to evaluate the effects of using blends of ethanol with conventional diesel fuel, with 5% and 10% (by vol.) ethanol, on the performance and exhaust emissions of a fully instrumented, six-cylinder, turbocharged and after-cooled, heavy duty, direct injection (DI), Mercedes-Benz engine, installed at the authors' laboratory, which is used to power the mini-bus diesel engines of the Athens Urban Transport Organization sub-fleet with a view to using bio-ethanol produced from Greek feedstock. The tests are conducted using each of the above fuel blends, with the engine working at two speeds and three loads. Fuel consumption, exhaust smokiness and exhaust regulated gas emissions such as nitrogen oxides, carbon monoxide and total unburned hydrocarbons are measured. The differences in the measured performance and exhaust emissions of the two ethanol-diesel fuel blends from the baseline operation of the engine, i.e. when working with neat diesel fuel, are determined and compared. Theoretical aspects of diesel engine combustion combined with the widely differing physical and chemical properties of the ethanol against those for the diesel fuel, are used to aid the correct interpretation of the observed engine behavior.
Energies, 2021
Oxygenated fuels, in this case short carbon-chain alcohols, have been investigated as alternative fuels to power compression ignition engines. A major advantage of short-chain alcohols is that they can be produced from renewable resources, i.e., cultivated commodities or biomass-based biorefineries. However, before entering the market, the effects of short-chain alcohols on engine performance, exhaust emissions, noise and sound quality need to be understood. This work sheds light on the relationship between the physicochemical properties of the alcohol/diesel fuel blends (ethanol and 1-propanol) on engine performance, exhaust emissions and, for the first time, on noise and sound quality. It has been demonstrated that when the content of alcohol in blends increased, soot and soluble organic material emissions drastically decreased, mainly due to the increase of oxygen content in the fuel. Reduction in soot emissions combined with higher thermodynamic efficiency of alcohol fuels, with...
Energies
Many countries have adopted the addition of biodiesel to diesel as a way of inserting renewable content into mineral fuel and making a contribution to the environment. The addition of ethanol to the diesel/biodiesel blend to increase the renewable content of the added fuel blend and reduce the percentage of biodiesel could be a strategysince the demand for biodiesel production is high, and this fuel has a high production cost when compared to ethanol. Thus, this study evaluated the performance and the content of NOx, CO and CO2 exhaust gases from a diesel engine fueled with blends of diesel/biodiesel/ethanol: pure B7, B7E3 (B7 with 3% ethanol) and B7E10 (B7 with 10% ethanol). Emissions of fuel blends were evaluated using the engine speed variation and tested at a speed of 1500 rpm under constant load (185 Nm). Assays were performed at engine speeds of 1000, 1100, 1250, 1500 and 1750 rpm and with loads of 10, 25, 50, 75 and 100% of the maximum torque. Through the performance curves, ...
The effect of ethanol blended diesel fuels on emissions from a diesel engine
Atmospheric Environment, 2003
The addition of ethanol to diesel fuel simultaneously decreases cetane number, high heating value, aromatics fractions and kinematic viscosity of ethanol blended diesel fuels and changes distillation temperatures. An additive used to keep the blends homogenous and stable, and an ignition improver, which can enhance cetane number of the blends, have favorable effects on the physicochemical properties related to ignition and combustion of the blends with 10% and 30% ethanol by volume.