Effect of ethanol addition on soot precursors emissions during benzene oxidation in a jet-stirred reactor

Rezgui, Yacine; Guemini, Miloud

doi:10.1007/s11356-014-2582-8

Cited by 12 publications

(5 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reaction rate analyses showed that the reaction paths were very similar when increasing the alcohol fraction in the mixture. In a similar way, Rezgui and Guemini carried out a computational study based on the experimental results previously obtained by Ristori et al and Aboussi on the effects of ethanol addition on the formation of some pollutants during benzene JSR oxidation, and their results indicated that the mole fractions of acetylene (C 2 H 2 ), cyclopentadienyl radical (C 5 H 5 ), and propargyl radical (C 3 H 3 ) decreased when increasing the ethanol percentage in the mixture. In an atmospheric plug-flow reactor, Abián et al analyzed the effect of the temperature (775–1375 K), air excess ratio (from fuel-rich to fuel-lean conditions), and ethanol concentration (0–200 ppm) on the oxidation of acetylene–ethanol mixtures.…”

Section: Introductionmentioning

confidence: 85%

“…In recent years, the role of ethanol as an additive to diesel or gasoline has been studied in engines (e.g., refs and ) and when added to different hydrocarbons (such as acetylene, ethylene, n -heptane, propene, iso-octane, or benzene, among others) in laboratory flames [for example, refs − ], jet-stirred reactors (JSRs), , and plug-flow reactors, to investigate its influence on combustion performance and pollutant emissions. Dagaut and Togbé carried out an experimental and modeling study of the oxidation of different mixtures of iso-octane with ethanol and 1-butanol in a JSR at an equivalence ratio of 1 and a pressure of 10 atm with good agreement between experimental and modeling calculations.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the role of ethanol as an additive to diesel or gasoline has been studied in engines (e.g., refs 3 and 4) and when added to different hydrocarbons (such as acetylene, ethylene, n-heptane, propene, iso-octane, or benzene, among others) in laboratory flames [for example, refs 5−9], jet-stirred reactors (JSRs), 10,11 and plug-flow reactors, 12 to investigate its influence on combustion performance and pollutant emissions.…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ethanol as a Fuel Additive: High-Pressure Oxidation of Its Mixtures with Acetylene

et al. 2018

View full text Add to dashboard Cite

An experimental and modeling study of the oxidation of acetylene-ethanol mixtures under highpressure conditions (10-40 bar) has been carried out in the 575-1075 K temperature range, in a plug flow reactor. The influence on the oxidation process of the oxygen inlet concentration (determined by the air excess ratio, λ) and the amount of ethanol (0-200 ppm) present in the reactant mixture has also been evaluated. In general, the predictions obtained with the proposed model are in satisfactory agreement with the experimental data. For a given pressure, the onset temperature for acetylene conversion is almost the same independently of the oxygen or ethanol concentrations in the reactant mixture, but it is shifted to lower temperatures when the pressure is increased. Under the conditions of this study, the ethanol presence does not modify the main reaction routes for acetylene conversion, being its main effect the modification of the radical pool composition.

show abstract

Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ethanol as a Fuel Additive: High-Pressure Oxidation of Its Mixtures with Acetylene

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In addition to the above technical constraints, the fact that physicochemical formation pathways of soot are still not fully understood-even in zero-dimensional systems-may provide enough rationale for the wide interests in soot studies with simple flow configurations. In this regard, various laboratory-scale setups have been employed, including constant volume combustion chambers [23][24][25][26][27][28][29][30], shock tubes [31][32][33][34][35][36][37][38][39][40], well-stirred reactors [41][42][43][44][45], burner-stabilized flat premixed flames [46][47][48][49][50][51][52][53][54][55], coflow diffusion flames [56][57][58][59][60][61][62][63][64][65][66][67][68]…”

Section: Laboratory-scale Experimental Configurationsmentioning

confidence: 99%

Soot formation in laminar counterflow flames

Wang

Chung

2019

Progress in Energy and Combustion Science

346

116

View full text Add to dashboard Cite

Many practical soot-emitting combustion systems such as diesel and jet engines rely on diffusion flames for efficient and reliable operation. Efforts to mitigate soot emissions from these systems are dependent on fundamental understanding of the physicochemical pathways leading from fuel to soot in laminar diffusion flames. Existing diffusion flame−based soot studies focused primarily on overventilated coflow flame where the fuel gas (or vapor) issues from a cylindrical tube into a co-flowing oxidizer, and counterflow flame, where a reacting zone is established between two opposing streams of fuel and oxidizer. As a canonical diffusion flame configuration, laminar counterflow diffusion flames have been widely used as a highly controllable environment for soot research, enabling significant progress in the understanding of soot formation for several decades. In view of the possibility of fuel/oxidizer premixing in practical systems, counterflow partially premixed flames have also been studied. In the present work we intend to provide a comprehensive review of the researches on various aspects of soot formation utilizing counterflow flames. Major processes of soot formation (formation of gas phase soot precursors, soot inception and surface reactions, as well as particle-particle interactions) are examined first, with focus on the most recent (post-2010) research progress. Experimental techniques and associated challenges for the measurement of soot-related properties (some knowledge of which is helpful for full appreciation of the experimental data to be reviewed) are then introduced. This is followed by a detailed description of soot evolution in counterflow flames, which is complemented by a discussion on the similarity and differences of the sooting structures between counterflow and coflow diffusion flames. Parametric studies of the effects of fuel molecular structure, fuel additive, partial-premixing, pressure, temperature, stoichiometric mixture fraction, and residence time on soot formation in counterflow flames will then be addressed in detail. This review concludes with a summary of the knowledge and challenges gathered and demonstrated through decades of research, and an outlook on opportunities for future counterflow flame−based soot research towards a more complete understanding of soot formation and the development of novel techniques for soot mitigation in practical combustion devices.

show abstract

“…6 Additionally, the carbonyl compounds such as formaldehyde and acetaldehyde are also among the major species on soot generation in diesel engine operation. 4 Various combustion devices have been introduced for the purpose of investigating soot formation in diesel fuels, including real engines, [7][8][9] constant volume combustion chambers, 10,11 jet stirred reactors, 12,13 and shock tubes. 14 Soot development in laminar diffusion flames is preferable because it makes it possible to conduct a practical fundamental study of the soot generation process in flames.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies of soot formation for petro‐ and renewable diesels

Alhikami

Wang

Nugroho

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary The soot formation characteristics of hydro‐processed renewable diesel (HRD), biodiesel, and petroleum diesel were studied in a non‐premixed counter‐flow laminar flame configuration. This investigation is discussed herein in terms of soot morphology, soot volume fraction (SVF), smoke point (SP), and threshold sooting index (TSI) measurements. It was found that both alternative diesel fuels (ie, HRD, and biodiesel) were similar in terms of the soot particle diameter, whereas petroleum diesel was found to exhibit the greatest soot particle formation. Additionally, the soot particle diameter and SVF were both sensitive to the variations of the reactant concentration by as much as 28%, and 86%, respectively. The sooting tendencies of the tested fuels were found to be proportional to their respective aromatic concentrations. In addition, the fuel containing higher hydrogen‐to‐carbon ratio (ie, HRD) had a lower SVF. The TSI indices reported that both HRD and biodiesel had a similar tendency to form soot, and the highest TSI index was petro‐diesel. The SVF has good correlations with the SP results.

show abstract

Effect of ethanol addition on soot precursors emissions during benzene oxidation in a jet-stirred reactor

Cited by 12 publications

References 80 publications

Ethanol as a Fuel Additive: High-Pressure Oxidation of Its Mixtures with Acetylene

Ethanol as a Fuel Additive: High-Pressure Oxidation of Its Mixtures with Acetylene

Soot formation in laminar counterflow flames

Experimental studies of soot formation for petro‐ and renewable diesels

Contact Info

Product

Resources

About