NOX emissions of compression ignition engines fueled with various biodiesel blends: A review

Mirhashemi, Fatemeh Sadat; Sadrnia, Hassan

doi:10.1016/j.joei.2019.04.003

Cited by 152 publications

(78 citation statements)

References 149 publications

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“…NO x emissions also vary with air-fuel ratio, combustion timing and duration. 17,42 Rahmani et al 43 noted that an optimum liner temperature would allow a certain trade-off between emissions and generated friction. Higher temperatures reduce lubricant ingression into the combustion chamber which in turn decreases the rate of lubricant evaporation, and hence the emissions.…”

Section: Introductionmentioning

confidence: 99%

Energy loss and emissions of engine compression rings with cylinder deactivation

Turnbull

Dolatabadi

Rahmani

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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A novel integrated multi-physics assessment of the piston top compression ring of an internal combustion engine under normal operation mode, as well as subjected to cylinder deactivation is carried out. The methodology comprises ring-liner thermo-mixed hydrodynamics, elastodynamics of ring, as well as combustion gas blow-by and emissions. Therefore, the analysis provides prediction of ring-liner contact’s energy losses and gas power leakage across the piston and ring crevices, as well as the resulting emissions. Cylinder deactivation (CDA) technology reduces the unburnt fuel entering the ring-pack crevices, as well as the emissions. It is also shown that the frictional and gas leakage power losses are exacerbated under CDA by as much as 20%. Although this is much lower than the potential gains in fuel usage when using CDA. The optimisation of the piston compression ring would provide further fuel efficiency and improved emissions, an issue which has not hitherto received the attention which it deserves. The in-depth analysis has also shown that CDA reduces the predicted CO, NOx and HC emissions by nearly as much as 8.5%, 10% and 8.7%, respectively.

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Section: Introductionmentioning

confidence: 99%

Energy loss and emissions of engine compression rings with cylinder deactivation

Turnbull

Dolatabadi

Rahmani

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Blending biodiesel with alcohols, biogas and gasoline reduced the NO x emissions. 46,47 Many researchers have produced castor biodiesel using transesterification process. The properties of transesterification/castor-biodiesel depend on the fatty acid content of the feedstock and agree with biodiesel standards.…”

Section: Introductionmentioning

confidence: 99%

Diesel engine performance, emissions and combustion characteristics of castor oil blends using pyrolysis

Attai

Abu-Elyazeed

ElBeshbeshy³

et al. 2014

Advances in Mechanical Engineering

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Castor biodiesel (CBD) was manufactured by slow pyrolysis of oil from highly yielded seeds with anhydrous sodium hydroxide catalyst. An experimental study of engine’s performance, emissions and combustion characteristics using biodiesel blended with gas oil in volumetric ratios of 0, 10, 25, 50, 75, and 100% at different loads was performed. Increase of CBD percentage in the blend led to a reduction in engine’s thermal efficiency, cylinder pressure, net heat release rate, and smoke emission. The exhaust gas temperature, specific fuel consumption, unburned hydrocarbon, CO, and nitrogen oxide emissions were increased with the increase of CBD ratio. Biodiesel showed the maximum increase in specific fuel consumption by 10% and the thermal efficiency was decreased by 10.5% about pure diesel. Smoke emissions were decreased for CBD100 by 12% about gas oil. The maximum increases in NOx, CO, HC emissions, and exhaust gas temperature for CBD 100 were 22, 34, 48, and 11%, respectively related to diesel oil. The maximum reductions in cylinder pressure and net heat release rate were 5 and 13% for CBD100 about gas oil, respectively. Biodiesel percentage of 10% showed near values of performance parameters and emissions to gas oil, so, it is recommended as the optimum percentage.

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“…Additionally, according to Yoon et al [28], pure biodiesel provides about 11% in mass of molecular oxygen and has a negligible content of sulfur and aromatics (which are precursors of this pollutant), two explanatory factors as to why smoke emissions are reduced with these types of fuel. An increase in biofuel content also generates an advance in the combustion process since biodiesel features a higher cetane index values compared to conventional Diesel [29], triggering a reduction in the ignition delay, better ignition performance and higher combustion efficiency [30]. However, engine speed and load did not show any significant impact on NOx emissions, as shown in Figure 7.…”

Section: Pollutant Emissions Resultsmentioning

confidence: 99%

Influence of biodiesel blends produced in Colombia on a Diesel engine

Venegas

Muñoz

2021

JMES

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Diesel engines have dominated the heavy duty and passenger vehicle market in the past 30 years. Consequently, the oil-derived fuels demand and the amount of pollutant emissions have witnessed exponential growth during the last three decades. Although Diesel engines present the advantage of higher efficiency and, therefore, lower levels of CO2 emissions, they produce high levels of NOX and particulate matter. In order to face these difficulties, the use of alternative fuels started booming in the early 2000s and continue to gain influence today. Biodiesel stands out from the alternative fuels’ selection for its ease of use, production, storage and potential to reduce levels of particles, CO, HC and CO2. The main goal of this research is to experimentally determine the influence of palm oil biodiesel produced in Colombia on a Diesel engine’s behavior in terms of engine performance and pollutant emissions. As different mixtures of commercial Diesel and biodiesel at different operating conditions were tested, the results showed that it is possible to maintain the engine’s performance at acceptable levels and to, in some cases, reduce smoke density and NOX levels.

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NOX emissions of compression ignition engines fueled with various biodiesel blends: A review

Cited by 152 publications

References 149 publications

Energy loss and emissions of engine compression rings with cylinder deactivation

Energy loss and emissions of engine compression rings with cylinder deactivation

Diesel engine performance, emissions and combustion characteristics of castor oil blends using pyrolysis

Influence of biodiesel blends produced in Colombia on a Diesel engine

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