A Review on SCR System for NOx Reduction in Diesel Engine

Latha, H.S.; Prakash, KB; Veerangouda, M.; Maski, Devanand; Ramappa, K. T.

doi:10.20546/ijcmas.2019.804.180

Cited by 22 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NOx emissions are reduced to harmless nitrogen (N2), water (H2O) and less harmful N2O. SCR reactions (equation 3-6) to reduce NOx emissions are shown below [22].…”

Section: Scr (Selective Catalytic Reduction)mentioning

confidence: 99%

A Study on the Effect of Injection Amount on NOx Emissions in the Selective Catalytic Reduction (SCR) System in a Single Cylinder Diesel Engine

ERÇEK

Baydir

2023

International Journal of Automotive Science and Technology

View full text Add to dashboard Cite

One of the most important exhaust emissions in diesel engines is nitrogen ox-ides (NOX). The most effective method in reducing NOX emissions is Selective Catalytic Reduction (SCR) systems. Although it has been used in light and heavy-duty vehicles in Turkey for about 15 years, it has become used in all die-sel motor vehicles, including cars as of 2020 due to the changing emission regu-lations. In the SCR system, nitrogen oxide emissions are reduced to nitrogen and water by injection of the diesel exhaust fluid (DEF) to the catalytic reactor. In this study, the SCR system was installed in a single-cylinder diesel engine and the DEF injector characteristic was extracted and NOx conversion efficiency was examined in various injection quantities. The aim of this study is to provide the best NOx conversion by finding the optimum injection amount and to reduce the accumulation of urea in the system by obtaining minimum DEF consumption. In experimental studies, NOx conversion was examined according to the DEF con-sumed in various injection amounts of 40, 80, 160, 240, 320, 400 and 560 mg/s. In order to determine the minimum DEF and maximum NOx percentage reduc-tion, the reduction % in NOx emission was proportioned by the DEF injector mass flow rate (mg/s). The highest result was obtained with a value of 0.38 with 40 mg/s injection.

show abstract

“…NOx emissions are reduced to harmless nitrogen (N2), water (H2O) and less harmful N2O. SCR reactions (equation 3-6) to reduce NOx emissions are shown below [22].…”

Section: Scr (Selective Catalytic Reduction)mentioning

confidence: 99%

A Study on the Effect of Injection Amount on NOx Emissions in the Selective Catalytic Reduction (SCR) System in a Single Cylinder Diesel Engine

ERÇEK

Baydir

2023

International Journal of Automotive Science and Technology

View full text Add to dashboard Cite

show abstract

“…This is a result of the dynamic technical progress of road vehicles, mainly the application of effective methods to reduce pollutant There is a clear tendency that the value of the energy emission factor for nitrogen oxides is much higher for heavy-duty trucks and buses than that for other categories studied. This is a result of greater difficulties in reducing the emission of nitrogen oxides from compression ignition engines as compared to spark ignition engines [Latha et al 2019;Liu, Gao 2011; Worldwide emission standards 2020/2021; Worldwide emission standards 2016/2017].…”

Section: Analysis Of Environmental Quality Of Road Vehicles With Resp...mentioning

confidence: 99%

Analysis of Pollutant Emission in Poland From Road Vehicles of the Generalised Category in Accordance With the Vehicle Application Criterion

Szczepański

Chłopek

Sar

et al. 2022

Environmental Protection and Natural Resources

View full text Add to dashboard Cite

This paper presents the results of analyses that were focused on pollutant emissions from road vehicles classified into the generalised categories with respect to vehicle use. The analyses were performed using the authorised results of Poland's pollutant emission inventory, carried out in 1990–2020 by the National Centre for Emissions Management (KOBiZE) at the Institute of Environmental Protection – National Research Institute (IOŚ-PIB) in order to meet requirements for the national emissions reporting under EU legislation and the UNECE Convention on Long-range Transboundary Air Pollution. The following road vehicle categories were analysed: passenger cars, light duty vehicles, heavy-duty trucks, buses (urban buses and coaches) and L category (motorcycles, mopeds, quads, microcars). The emissions of selected pollutants that are harmful to the health of living beings were studied, i.e. nitrogen oxides, non-methane volatile organic compounds, sulfur compounds, particulate matter size fractions, carbon monoxide and lead compounds. The shares of national annual pollutant emissions from each studied vehicle category of the total pollutant emissions from road transport were determined. With the aim to assess trends in improving environmental properties of road vehicles, there were determined changes of the energy emission factors for individual pollutants in all the vehicle categories under the study. The results obtained showed dynamic decreases in the energy emission factors for nitrogen oxides, non-methane volatile organic compounds and carbon monoxide. In the case of particulate matter emission, the improvement was not as pronounced. The evident reduction in the emissions of sulfur and lead compounds in the 21st century was confirmed to be a consequence of practical elimination of these compounds from road vehicle fuels.

show abstract

“…While SCR technology with its simple structure, mature technology, little impact on engine performance, and high denitrification efficiency of more than 90% has become a feasible scheme to purify marine NOx emission. [13][14][15] Despite the many advantages of the SCR reactor, the calibration of its model parameters is very problematic. The main problems are the nonlinearity of the SCR model and the large number of parameters involved.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the applicability of parameters identification of marine diesel engine SCR kinetic model based on Discrete-Grid algorithm

Xia

Zhu

Shreka

et al. 2023

International Journal of Engine Research

View full text Add to dashboard Cite

Selective catalytic reduction (SCR) technology is the most widely used denitrification method in industry. However, the calibration of its kinetic model is very problematic due to the large number of parameters involved and the nonlinear characteristics, especially for the undesired reactions such as formation-decomposition of ammonium nitrate (AN), ammonium sulfate (AS), ammonium bisulfate (ABS), etc. In this paper, the synthetic gas test bench and the SCR system of WD10 marine diesel engine burning high-sulfur fuel oil (HSFO) and low-sulfur fuel oil (LSFO) are taken as the research objects. Firstly, based on the experimental data obtained from the synthetic gas test bench, the pre-exponential multiplier and activation energy of each reaction were identified using the Discrete-Grid algorithm. In this work, considering that the production of N2O, SO3, AN, AS, and ABS in the undesired reactions is very low, not on the same order of magnitude as that of NO and NH3, it is easy to overlook their reaction characteristics in the optimization process. We have adopted an approach that amplifies the error between the predicted concentration and the observed concentration of the species to solve this problem. Secondly, a detailed and complete SCR kinetic model was constructed. Finally, with the parameter identification results obtained from the synthesis gas bench as initial values, all the kinetic parameters of the WD10 marine engine SCR model was calibrated simultaneously using the Discrete-Grid algorithm. The results showed that the SCR kinetic model derived from the synthetic gas test bench was suitable for the real marine engine SCR system when the range of temperature and space velocity (SV) of the synthetic gas bench test is similar to that of the marine SCR system.

show abstract

A Review on SCR System for NOx Reduction in Diesel Engine

Cited by 22 publications

References 10 publications

A Study on the Effect of Injection Amount on NOx Emissions in the Selective Catalytic Reduction (SCR) System in a Single Cylinder Diesel Engine

A Study on the Effect of Injection Amount on NOx Emissions in the Selective Catalytic Reduction (SCR) System in a Single Cylinder Diesel Engine

Analysis of Pollutant Emission in Poland From Road Vehicles of the Generalised Category in Accordance With the Vehicle Application Criterion

Investigation on the applicability of parameters identification of marine diesel engine SCR kinetic model based on Discrete-Grid algorithm

Contact Info

Product

Resources

About