Effect of fuel oxygen on the trade-offs between soot, NOx and combustion efficiency in premixed low-temperature diesel engine combustion

Zhu, Haoyue; Bohac, Stanislav V.; Nakashima, Kouichi; Hagen, Luke M.; Huang, Zhen; Assanis, Dennis N.

doi:10.1016/j.fuel.2013.05.023

Cited by 36 publications

(6 citation statements)

References 35 publications

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“…Exhaust gas recirculation (EGR) and fuel injection timing retardation are the commonly used strategies for reducing NO X emissions, however, in this case, an increase in soot emis-sions and brake-specific fuel consumption occurs on account of diminished combustion temperature and oxygen concentration [35]. This is a substantial practical difficulty to meet increasingly strict emission regulations [36]. The trade-off between NO X and smoke opacity for test fuels is depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

Improvement of exhaust emissions in a diesel engine with the addition of an oxygenated additive to diesel-biodiesel blends

Çakmak¹

2023

energetika

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Emissions control in internal combustion engines is the big challenge faced by engine manufacturers. Modern internal combustion engines exploit various systems to reduce exhaust emissions. However, the existing emission control systems will fall short of meeting stringent future emission regulations. This study attempts to reduce the exhaust emissions of a diesel engine fuelled with diesel-biodiesel blends by utilising ethyl acetate as a renewable oxygenated fuel additive. In this context, initially, ethyl acetate is mixed with biodiesel-diesel blends by 5% and 10% volume to obtain test fuels. Then, their fuel properties are measured by applying test methods proposed in the standards. Subsequently, engine experiments are conducted on a single-cylinder four-stroke diesel engine operated on distinct test conditions. The findings indicate that the inclusion of ethyl acetate in the diesel-biodiesel blends improves the fuel quality and markedly decreases emissions. A substantial reduction is achieved in NOX, soot, and CO emissions up to 50%, 70%, and 71%, respectively, with a slight increase in fuel consumption in the case of adding ethyl acetate. More importantly, the addition of ethyl acetate enhances the NOX-smoke trade-off and NOX-BSFC trade-off characteristic of a diesel engine without loss of thermal efficiency. From this research, it can be inferred that ethyl acetate can potentially reduce exhaust emissions of the existing diesel engines fuelled with diesel-biodiesel blends.

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Section: Resultsmentioning

confidence: 99%

Improvement of exhaust emissions in a diesel engine with the addition of an oxygenated additive to diesel-biodiesel blends

Çakmak¹

2023

energetika

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“…Literatürdeki çoğu çalışmada biyodizelin yüksek oksijen içeriği nedeniyle NOx seviyelerinin arttığı bildirilmiştir (Chattopadhyay & Sen, 2013;Ganapathy, Gakkhar, & Murugesan, 2011;Lahane & Subramanian, 2015). Birkaç araştırmacı, biyodizel yakıtla bağlanmış oksijenin NOx emisyonlarını arttırdığı fikrini reddeden bir sonuca ulaşmışlardır (Lapuerta, Armas, Ballesteros, & Fernández, 2005;Ng, Ng, & Gan, 2012;Zhu et al, 2013). An ve diğ.…”

Section: Biyodizelunclassified

Sustainable Road Transport: Alternative Fuels, Electrical Vehicles and Environmental Effects

2019

JSTR

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Transportation sector enables the transfer of goods and services that forms the basis of the economy and the work of people. It supports global productivity and is a key for economic growth. On the other hand, transportation is largely based on fossil fuels and generates greenhouse gas emissions. Moreover, it releases other pollutants and creates local air pollution. Although the air pollutant emissions of road transport of Turkey have decreased over the years due to new emission standards, greenhouse gas emisions of the same sector in Turkey have been sharply increased. Therefore, there is an urgent necessity of focusing on sustainable transport strategies to reduce emissions from transportation sector. The sustainability of the road transportation depends on alternative fuels and electric vehicles. Alternative fuels like biodiesel and bioethanol have already been used in motor vehicles for many years. Using alternative fuels reduce the release of air pollutant emissions except nitrogen oxides. However, alternative fuel production generally depends on local farming and not common every part of the world. Electric vehicles are a hope for road transport sustainability. Hybrid electric cars consume less fossil fuel and full electric cars run on only by electricity. If electricity comes from an alternative energy source, transportation by electric vehicles will be much more sustainable since it does not produce any greenhouse gas or air pollutants. This paper briefly discusses motor vehicle air pollution problem and gives some information about Turkish road transport sector emissions. Furthermore, it reviews sustainable road transport options mainly by focusing on alternative fuels and electric vehicles. Also, there exist some suggestions for policy makers about the sustainability of transportation sector.

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“…It was reported in most of the literature that, NOx levels increase with the use of biodiesel due to their higher oxygen contents . A few researchers found the opposite trend , negating the idea that biodiesel fuel‐bound oxygen increases NOx emissions. An et al .…”

Section: Introductionmentioning

confidence: 99%

“…It was reported in most of the literature that, NOx levels increase with the use of biodiesel due to their higher oxygen contents [14][15][16][17][18][19]. A few researchers found the opposite trend [20][21][22], negating the idea that biodiesel fuel-bound oxygen increases NOx emissions. An et al [23] showed a reduction of NOx with the use of B100, owing to lower in-cylinder pressure and heat release rate, except under a few operating conditions (low speeds and high load), where the opposite trend was observed.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of fuel cetane number, oxygen content, fuel density, and engine operating variables on NOx emissions of a heavy duty diesel engine

Singh

Subramanian

Juneja

et al. 2016

Env Prog and Sustain Energy

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Biodiesel is a promising alternative fuel for compression ignition (CI) engine, but the nitrogen oxide (NOx) liability associated with it is a major challenge. NOx emissions are affected by both engine technology and fuel properties. Experimental studies were conducted on an unmodified heavy‐duty direct injection diesel engine to analyze the effect of fuel properties such as cetane number (CN), oxygen content, fuel density, and engine operating variables (speed and load) on NOx emissions. Test results revealed that NOx concentration is directly proportional to engine load and to biodiesel percentage in blends, and is inversely related to engine speed. Fuel‐bound oxygen in the blended fuels are mainly responsible for the higher NOx. An empirical correlation was developed to predict NOx concentration as a function of CN, oxygen content, fuel density, speed, and load. Experimental and predicted values of NOx emission concentrations for two blends, BA25 and BA50 (25% and 50% microalgae biodiesel blended with diesel), at 2205 rpm and 100% load are 723.19 and 722.94 ppm, and 749.89 and 791.12 ppm, respectively. The developed correlation will be useful in estimating the NOx emissions of a CI engine fueled with various other oxygenated biofuels at different speeds and loads. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 214–221, 2017

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Effect of fuel oxygen on the trade-offs between soot, NOx and combustion efficiency in premixed low-temperature diesel engine combustion

Cited by 36 publications

References 35 publications

Improvement of exhaust emissions in a diesel engine with the addition of an oxygenated additive to diesel-biodiesel blends

Improvement of exhaust emissions in a diesel engine with the addition of an oxygenated additive to diesel-biodiesel blends

Sustainable Road Transport: Alternative Fuels, Electrical Vehicles and Environmental Effects

Investigating the effect of fuel cetane number, oxygen content, fuel density, and engine operating variables on NOx emissions of a heavy duty diesel engine

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