Comparison of the Impact of Intake Oxygen Enrichment and Fuel Oxygenation on Diesel Combustion and Emissions

Song, Juhun; Zello, Vince; Boehman, André L.; Waller, Francis J.

doi:10.1021/ef034103p

Cited by 115 publications

(47 citation statements)

References 32 publications

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“…If a reduction in soot increases local flame temperatures, then any oxygenate additive should behave similar to biodiesel blends since the oxygen in the fuel lowers the soot, which should, in turn, increase local flame temperatures and NO x . Previous studies show varied results on NO x emissions (some increase, some decrease) with an oxygenated fuel blended with diesel fuel [19,20,44]. Song et al [20] was the only study to match the combustion phasing between the oxygenated blends and the base diesel fuel, which resulted in an increase in the NO x emissions and decrease in the soot; similar to biodiesel blends.…”

Section: Fuel Property Correlationsmentioning

confidence: 99%

Neat fuel influence on biodiesel blend emissions

Thompson

Nuszkowski

2009

International Journal of Engine Research

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The emissions of oxides of nitrogen (NO x ) from biodiesel blended fuels reported in the literature vary from an NO x increase to an NO x decrease relative to the neat petroleum diesel fuel (PDF). To explain these NO x differences, three PDFs with varying fuel properties were admixed with a neat soy-derived biodiesel at 10 per cent and 20 per cent volume ratios and evaluated using a heavy-duty diesel engine exercised over transient and steady-state cycles. The PDFs with 'low' and 'medium' cetane numbers led to a change in combustion phasing when blended with the neat biodiesel, resulting in reduced NO x emissions at low engine power. The B100 blended with the 'high'-cetane-number PDF showed minimal change in combustion phasing and resulted in an NO x increase at all engine loads. The derived peak incylinder gas temperature variation correlated with the brake-specific NO x emissions indicating that the thermal NO x formation responds to the addition of biodiesel. The biodiesel blends had an NO x -particulate matter trade-off, also suggesting a thermal NO x effect. The increase in NO x emissions of the biodiesel blends also had a strong correlation with the level of saturated hydrocarbons at high engine power.

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Section: Fuel Property Correlationsmentioning

confidence: 99%

Neat fuel influence on biodiesel blend emissions

Thompson

Nuszkowski

2009

International Journal of Engine Research

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“…A number of analytical and experimental studies [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] have demonstrated the benefits of using oxygen enriched combustion in diesel engines. The results of all these investigation show a considerable decrease in unburned hydrocarbon, carbon monoxide emissions and smoke while oxides of nitrogen emissions increased pro-rata with the oxygen added.…”

Section: Introductionmentioning

confidence: 99%

“…One of the potential drawbacks of oxygen enrichment is increased oxides of nitrogen from the tailpipe; however, this can be controlled by emulsified diesel as the results of Sekar et al [15] and Subramanian and Ramesh [17] reports shows. Song et al [16] compared the combustion and emission characteristics of oxygenated fuel and raw oxygen added into the intake air and found that the combustion characteristics of hydrocarbon fuel enhanced by supplying extra oxygen as it increases the flame velocity, flame temperature, lean flammability limit, flame stability, and available energy. Salzano et al [14] and Cammarota et al [4] report that, increase in flame velocity and flame temperature can lead to a flame propagation which is not deflagration but it is combustion induced rapid phase transition.…”

Section: Introductionmentioning

confidence: 99%

Effects of oxygen enriched combustion on pollution and performance characteristics of a diesel engine

Baskar

Senthilkumar

2016

Engineering Science and Technology, an International Journal

115

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A B S T R A C TOxygen enriched combustion is one of the attractive combustion technologies to control pollution and improve combustion in diesel engines. An experimental test was conducted on a single cylinder direct injection diesel engine to study the impact of oxygen enrichment on pollution and performance parameters by increasing the oxygen concentration of intake air from 21 to 27% by volume. The tests results show that the combustion process was improved as there is an increase in thermal efficiency of 4 to 8 percent and decrease in brake specific fuel consumption of 5 to 12 percent. There is also a substantial decrease in unburned hydro carbon, carbon mono-oxide and smoke density levels to the maximum of 40, 55 and 60 percent respectively. However, there is a considerable increase in nitrogen oxide emissions due to increased combustion temperature and extra oxygen available which needs to be addressed.

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“…The concept of oxygen enrichment of the intake air as a method of enhancing combustion in engines has been investigated for a long time [16,17]. One method to control the oxygen concentration is to inject the pure oxygen from a gas cylinder into the intake of the engine.…”

Section: Motivation and Related Workmentioning

confidence: 99%

Performance and emissions optimization of an ethanol-gasoline fueled SI engine with oxygen enrichment using artificial bee colony algorithm

2017

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Abstract. The use of arti cial neural network in conjunction with arti cial bee colony algorithm is proposed as a method for performance and emissions optimization of an SI engine. The case study here involves the oxygen enriched combustion of an SI engine fueled with hydrous ethanol and gasoline. In this study, the engine was considered as a black box and its performance and emissions were extracted experimentally at di erent intake air oxygen concentrations, hydrous ethanol injection rates, and ethanol concentration in the hydrous ethanol mixture. Then, the simultaneous injection of hydrous ethanol and oxygen enriched combustion was investigated to maximize the fuel conversion e ciency and minimize the CO and NOx emissions. Therefore, an objective function consisting of both the emission and performance parameters was optimized using the Arti cial Bee Colony algorithm. The engine model used in this optimization process was obtained from an Arti cial Neural Network trained with experimental engine data. For operating speed of 3000 rpm, the optimization results indicated 1.21% improvement in fuel conversion e ciency and 31.11% and 13.94% reduction in CO and NOx emissions, respectively. At the speed of 2000 rpm, fuel conversion e ciency improved by 4.11% and CO emission decreased by 18.73%, while NOx concentration increased by 28.35%.

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Comparison of the Impact of Intake Oxygen Enrichment and Fuel Oxygenation on Diesel Combustion and Emissions

Cited by 115 publications

References 32 publications

Neat fuel influence on biodiesel blend emissions

Neat fuel influence on biodiesel blend emissions

Effects of oxygen enriched combustion on pollution and performance characteristics of a diesel engine

Performance and emissions optimization of an ethanol-gasoline fueled SI engine with oxygen enrichment using artificial bee colony algorithm

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