2000
DOI: 10.1243/0954407001527727
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In-cylinder studies of the effects of CO2 in exhaust gas recirculation on diesel combustion and emissions

Abstract: This paper reports the results of the effects of CO2 in exhaust gas recirculation (EGR) on diesel combustion and emissions. The experiments were carried out on a specially designed single-cylinder diesel engine. In-cylinder measurements were obtained from the optically accessible swirl chamber using high-speed shadowgraphy, the two-colour method and laser extinction. Furthermore, in-cylinder pressure measurements from the combustion chambers were used to derive the heat release rates during combustion. Two ex… Show more

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Cited by 27 publications
(11 citation statements)
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“…Moreover, the chemical structures such as aromatics, C=C and cyclic molecules, which are regarded to have increased PM producing tendency, are absent in gaseous fuels such as NG or biogas [43,44]. The reduction in PM emissions in this study were attributed to (a) a direct consequence of flame temperature reduction (resulting a lower PM nucleation rate) and the lowered concentration (or mass fraction) of acetylene, (b) increased oxidation of soot nuclei/precursors in the soot forming region by the enhanced concentrations of O and OH around the flame (resulting in the high oxidation attack) that was produced from the CO 2 reaction mechanism [45,46]. From the Fig.7 it is also observed that the more CO 2 in biogas, the more reduction in PM mass emissions.…”
Section: Gravimetric Methodsmentioning
confidence: 78%
“…Moreover, the chemical structures such as aromatics, C=C and cyclic molecules, which are regarded to have increased PM producing tendency, are absent in gaseous fuels such as NG or biogas [43,44]. The reduction in PM emissions in this study were attributed to (a) a direct consequence of flame temperature reduction (resulting a lower PM nucleation rate) and the lowered concentration (or mass fraction) of acetylene, (b) increased oxidation of soot nuclei/precursors in the soot forming region by the enhanced concentrations of O and OH around the flame (resulting in the high oxidation attack) that was produced from the CO 2 reaction mechanism [45,46]. From the Fig.7 it is also observed that the more CO 2 in biogas, the more reduction in PM mass emissions.…”
Section: Gravimetric Methodsmentioning
confidence: 78%
“…Furthermore, CO2 was used in simulating the effects of EGR by [28]. Their findings showed that CO2 addition was suitable in extenuating NOx and soot emissions and the cost of EGR cooling system.…”
Section: Cng-co2/diesel Dual-fuel Combustionmentioning
confidence: 99%
“…Zhao et al, 12 it was concluded that the majority of the NO X reduction from CO 2 was primarily the result of the dilution effect (i.e. a reduction in oxygen mass fraction) with a minor contribution due to a chemical and thermal effect.…”
Section: Andmentioning
confidence: 99%