The Influence of Reduxco Catalyst in the Diesel Fuel on Energy Parameters, Exhaust Gas Composition and Rate of Heat Release of a Diesel Engine

Cisek, Jerzy; Leśniak, Szymon; Mokretskyy, Vitaliy; Przybylski, Włodzimierz

doi:10.4271/2020-01-2061

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…The shorter self-ignition delay for DFKA (than for the base fuel) explains the lower NO x concentration in the exhaust gas because the smallest amount of fuel accumulates in the combustion chamber of the engine in the shortest time between the start of injection and the start of fuel self-ignition. The smaller the amount of fuel subject to spontaneous combustion, the lower the dynamics of the initial (kinetic) combustion phase, leading to reduced temperature in the combustion phase associated with the formation of NO x and ultimately reducing the NO x concentration in the exhaust gas (relative to the base fuel) [53]. However, this does not explain why the DFS fuel, with a slightly higher τ c value than the DFKA fuel, produces the lowest NO x concentration in the exhaust gas.…”

Section: Indicator Chartsmentioning

confidence: 99%

Visualisation and Thermovision of Fuel Combustion Affecting Heat Release to Reduce NOx and PM Diesel Engine Emissions

et al. 2022

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Research was conducted on fuels with additives that selectively affect the rate of kinetic (dQk/dα) and diffusion (dQd/dα) combustion in the diesel engine cylinder. In addition to the base fuel (DFB), DFKA fuel with an additive reducing dQk/dα, DFDA fuel with an additive increasing dQd/dα, and DFS fuel with both additives were tested. The main purpose of such dQ/dα course control in the engine cylinder was to simultaneously reduce the emissions of nitrogen oxides (NOx) and particulate matter (PM), and to increase the efficiency of the combustion process. Similar to the course of the dQ/dα, the course of the combustion temperature (Tc(α)) affects the NOx produced and the number of afterburned solid particles; the influence of the fuel additives on the functional curves was analysed. In addition to analysis of the temperature Tc(α) calculated from the indicator diagrams, Tc(α) analysis was conducted using the two-colour method, which allows the analysis of the isotherm distributions locally and temporarily. The two-colour method required prior endoscopic visualisation of the fast-changing processes inside the engine cylinder. Parameters defined by pressure, temperature, heat release rate, and visualisation and thermovision in the engine cylinder (as a function of the crank angle) allowed for an in-depth cause and effect analysis. It was determined why combustion of DFS fuel with both additives produced a synergy resulting in the simultaneous reduction in NOx and PM emissions in the exhaust gas and an increase in combustion efficiency. This publication relates to the field of Mechanical Engineering.

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Section: Indicator Chartsmentioning

confidence: 99%

Visualisation and Thermovision of Fuel Combustion Affecting Heat Release to Reduce NOx and PM Diesel Engine Emissions

et al. 2022

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The Synergy of Two Biofuel Additives on Combustion Process to Simultaneously Reduce NOx and PM Emissions

et al. 2021

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The article presents the results of research on the influence of two fuel additives that selectively affect the combustion process in a diesel engine cylinder. The addition of NitrON® reduces the concentration of nitrogen oxides (NOx), due to a reduction in the kinetic combustion rate, at the cost of a slight increase in the concentration of particulate matter (PM) in the engine exhaust gas. The Reduxco® additive reduces PM emissions by increasing the diffusion combustion rate, while slightly increasing the NOx concentration in the engine exhaust gas. Research conducted by the authors confirmed that the simultaneous use of both of these additives in the fuel not only reduced both NOx and PM emissions in the exhaust gas but additionally the reduction of NOx and PM emissions was greater than the sum of the effects of these additives—the synergy effect. Findings indicated that the waveforms of the heat release rate (dQ/dα) responsible for the emission of NOx and PM in the exhaust gas differed for the four tested fuels in relation to the maximum value (selectively and independently in the kinetic and diffusion stage), and they were also phase shifted. Due to this, the heat release process Q(α) was characterized by a lower amount of heat released in the kinetic phase compared to fuel with NitrON® only and a greater amount of heat released in the diffusion phase compared to fuel with Reduxco® alone, which explained the lowest NOx and PM emissions in the exhaust gas at that time. For example for the NOx concentration in the engine exhaust: the Nitrocet® fuel additive (in the used amount of 1500 ppm) reduces the NOx concentration in the exhaust gas by 18% compared to the base fuel. The addition of a Reduxco® catalyst to the fuel (1500 ppm) unfortunately increases the NOx concentration by up to 20%. On the other hand, the combustion of the complete tested fuel, containing both additives simultaneously, is characterized, thanks to the synergy effect, by the lowest NOx concentration (reduction by 22% in relation to the base). For example for PM emissions: the Nitrocet® fuel additive does not significantly affect the PM emissions in the engine exhaust (up to a few per cent compared to the base fuel). The addition of a Reduxco® catalyst to the fuel greatly reduces PM emissions in the engine exhaust, up to 35% compared to the base fuel. On the other hand, the combustion of the complete tested fuel containing both additives simultaneously is characterized by the synergy effect with the lowest PM emission (reduction of 39% compared to the base fuel).

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The Influence of Reduxco Catalyst in the Diesel Fuel on Energy Parameters, Exhaust Gas Composition and Rate of Heat Release of a Diesel Engine

Cited by 2 publications

References 4 publications

Visualisation and Thermovision of Fuel Combustion Affecting Heat Release to Reduce NOx and PM Diesel Engine Emissions

Visualisation and Thermovision of Fuel Combustion Affecting Heat Release to Reduce NOx and PM Diesel Engine Emissions

The Synergy of Two Biofuel Additives on Combustion Process to Simultaneously Reduce NOx and PM Emissions

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