Experimental investigation on emission characteristics of non-road diesel engine equipped with integrated DOC + CDPF + SCR aftertreatment

Hu, Jie; Liao, Jianxiong; Hu, Youyao; Jun, Lei; Zhang, Ming; Zhong, Jing; Yan, Fuwu; Cai, Zhizhou

doi:10.1016/j.fuel.2021.121586

Cited by 43 publications

(9 citation statements)

References 32 publications

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“…It can efficiently oxidize HC, CO and soluble organic component. It can also oxidize NO to NO 2 , which is conducive to the rapid reduction reaction of SCR [109]. It is found that DOC system can effectively remove CO, HC, NO and soot emissions from engine exhaust, and SCR device behind DOC device can effectively reduce NO X emissions.…”

Section: Doc Technologymentioning

confidence: 99%

The Impact of Alternative Fuels on Ship Engine Emissions and Aftertreatment Systems: A Review

Feng

Yuan

et al. 2022

Catalysts

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Marine engines often use diesel as an alternative fuel to improve the economy. In recent years, waste oil, biodiesel and alcohol fuel are the most famous research directions among the alternative fuels for diesel. With the rapid development of the shipping industry, the air of coastal areas is becoming increasingly polluted. It is now necessary to reduce the emission of marine engines to meet the strict emission regulations. There are many types of alternative fuels for diesel oil and the difference of the fuel may interfere with the engine emissions; however, PM, HC, CO and other emissions will have a negative impact on SCR catalyst. This paper reviews the alternative fuels such as alcohols, waste oils, biodiesel made from vegetable oil and animal oil, and then summarizes and analyzes the influence of different alternative fuels on engine emissions and pollutant formation mechanism. In addition, this paper also summarizes the methods that can effectively reduce the emissions of marine engines; it can provide a reference for the study of diesel alternative fuel and the reduction of marine engine emissions.

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Section: Doc Technologymentioning

confidence: 99%

The Impact of Alternative Fuels on Ship Engine Emissions and Aftertreatment Systems: A Review

Feng

Yuan

et al. 2022

Catalysts

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“…3,4 The performance of DOCs for various diesel engine applications has been studied in the literature extensively. [5][6][7][8][9][10] The oxidation process in the DOC begins with the oxidation of CO because of the catalyst's selectivity for its oxidation. After significant oxidation of CO, THC oxidation begins due to strong inhibition effects of CO and strong carbon-hydrogen (C-H) bonds of THC.…”

Section: Introductionmentioning

confidence: 99%

“…In the washcoat, interdependent diffusion and heterogenous chemical reactions occur. It is worth mentioning that, generally, in the numerical models, both for actual exhaust and flow reactor artificial exhaust conditions, only the external mass transfer limitations of the exhaust gas species from open channel to the flow-channel interface was considered [6][7][8][9][10][11][12][13][14][15][16][17] and the internal diffusion phenomenon was ignored. In some other numerical models, the internal mass transfer phenomenon for CO and THC oxidation reactions were only considered.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling and non-dimensional analysis of a diesel oxidation catalyst with focus on NO₂ reduction

Suman,

Khedkar,

Sarangi

et al. 2024

International Journal of Engine Research

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A diesel oxidation catalyst (DOC) is widely used to oxidize partial combustion by-products, such as unburned hydrocarbons and carbon monoxide (CO), and nitric oxide (NO) from compression ignition (CI) engines. Numerical modelling of the DOC, reported in the literature, often does not predict the performance of the DOC accurately over a wide range of engine operating conditions because only a few chemical reactions are considered. The objective of this work is to develop a robust 1D transient numerical model, capable of accurately predicting the conversion efficiency of the engine-out total hydrocarbon (THC), CO and NO in a conventional diesel combustion mode. Based on experimental observations of the low temperature oxidation of CO and THC with nitrogen dioxide (NO2), the developed numerical model not only include oxidation reactions with oxygen but also the NO2 reduction and selective catalytic reduction (SCR) reactions to improve the robustness of the model. From the non-dimensional analysis, the kinetics and mass transfer limitation of exhaust gas species oxidation and their dependence on exhaust gas properties and DOC geometric parameters are identified. Relative magnitudes of resistances to chemical reaction and mass transfer reveal that CO oxidation in the DOC transitions from kinetically controlled to a mass transfer-controlled regime at the CO oxidation light-off temperature (218°C DOC inlet temperature), whereas, THC oxidation is in the kinetic controlled regime even at 377°C exhaust gas temperature. NO2 reduction in the DOC is always in the kinetic controlled regime; however, NO oxidation reaction transitions from kinetic to a mass transfer-controlled regime at 215°C.

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“…To meet the EURO VI emission norms (In India, it is BS-VI equivalent to EURO VI norms), diesel-powered ICE's have undergone a rapid change over the years with the help of technologies such as; (i) electronically controlled flexible common rail direct injection (CRDI) [4], (ii) variable geometry turbochargers (VGT) [5], (iii) exhaust gas recirculation (EGR) [6], (iv) multi-valving, (v) variable valve timing (VVT) [7], and (vi) various after treatment systems (Diesel oxidation catalysts (DoC), Diesel particulate filter (DPF), Selective catalytic reduction (SCR)) [8][9][10][11] engines/vehicles are more dependent on after-treatment technologies with complex control strategies to reduce the diesel particulates (PM) and oxides of nitrogen (NOx) to comply for EURO VI / BS VI norms. As an alternate to this, many researchers have worked on an alternate combustion technique known as low-temperature combustion (LTC) to reduce the PM and NOx emissions simultaneously [12].…”

Section: Introductionmentioning

confidence: 99%

A study on flexible dual-fuel and flexi combustion mode engine to mitigate NO, soot and unburned emissions

Duraisamy

Rangasamy

Hossain

2022

Fuel

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Experimental investigation on emission characteristics of non-road diesel engine equipped with integrated DOC + CDPF + SCR aftertreatment

Cited by 43 publications

References 32 publications

The Impact of Alternative Fuels on Ship Engine Emissions and Aftertreatment Systems: A Review

The Impact of Alternative Fuels on Ship Engine Emissions and Aftertreatment Systems: A Review

Numerical modelling and non-dimensional analysis of a diesel oxidation catalyst with focus on NO₂ reduction

A study on flexible dual-fuel and flexi combustion mode engine to mitigate NO, soot and unburned emissions

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Experimental investigation on emission characteristics of non-road diesel engine equipped with integrated DOC + CDPF + SCR aftertreatment

Cited by 43 publications

References 32 publications

The Impact of Alternative Fuels on Ship Engine Emissions and Aftertreatment Systems: A Review

The Impact of Alternative Fuels on Ship Engine Emissions and Aftertreatment Systems: A Review

Numerical modelling and non-dimensional analysis of a diesel oxidation catalyst with focus on NO2 reduction

A study on flexible dual-fuel and flexi combustion mode engine to mitigate NO, soot and unburned emissions

Contact Info

Product

Resources

About

Numerical modelling and non-dimensional analysis of a diesel oxidation catalyst with focus on NO₂ reduction