Variations in non-thermal NO formation pathways in alcohol flames

Bohon, Myles D.; Guiberti, Thibault F.; Sarathy, S. Mani; Roberts, William L.

doi:10.1016/j.proci.2016.05.024

Cited by 17 publications

(4 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For clarity reasons, net rates are expressed in % and the diagram was simplified by removing negligible pathways (< 10%). It clearly shows the complexity of the chemical structure of the N-species mechanism: it is very difficult to obtain directly the contribution to the overall NO formation by only removing each of the four major routes (prompt, thermal, NNH and N2O) because of crossed pathways as mentioned in [41,44].…”

Section: B-1) Reaction Pathwaysmentioning

confidence: 99%

“…More recently, the same group [39] published LIF NO measurements in high pressure lean methane-air stagnation flames (P = 0.2, 0.4 and 0.8 MPa), with a modelling study using the NUIG mechanism [40]. Bohon et al [41,42] also studied NO formation in alcohol and alkanes premixed flames at atmospheric pressure. Zhou et al [43] investigated the effect of CH4 content in syngas flames on NO formation in a premixed flat flame burner at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

NO formation in high pressure premixed flames: Experimental results and validation of a new revised reaction mechanism

Persis

Pillier

Idir

et al. 2020

Fuel

View full text Add to dashboard Cite

This paper presents an experimental and modelling study of NO formation in high pressure premixed flames.Experiments were performed in a high-pressure counterflow burner in which laminar premixed CH4/air flames were stabilised at equivalence ratios of E.R=0.7, 1 and 1.2 and for pressures varying from 0.1 to 0.7 MPa. We report quantitative NO mole fraction profiles measured by Laser Induced Fluorescence. The effects of pressure and equivalence ratio on NO formation are discussed. These results are compared to the simulations using two reaction mechanisms: NOmecha2.0 associated to a detailed mechanism for methane oxidation: GDFkin ® 3.0 and the mechanism from Klippenstein et al., which is the most recent high-pressure NOx formation mechanism available in the literature. In general, both mechanisms are able to predict NO correctly in lean and stoichiometric high pressure flames; however, in rich flames, GDFkin ® 3.0_NOmecha2.0 gives the best predictions. The performances of these mechanisms are also tested on NO measurements in high-pressure flames from the literature.A kinetic analysis is then presented to identify the main pathways that lead to the formation and consumption of NO and highlight the differences between the two mechanisms, as well as a sensitivity analysis to identify important reactions that influence the formation/consumption of NO in our high pressure flames.

show abstract

Section: B-1) Reaction Pathwaysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

NO formation in high pressure premixed flames: Experimental results and validation of a new revised reaction mechanism

Persis

Pillier

Idir

et al. 2020

Fuel

View full text Add to dashboard Cite

show abstract

“…To meet the demands of real-world industrial production, the development of FIR burners using precise and highly efficient methods represents a burgeoning area of research for the future. Wet chemiluminescence detector measurements, , along with laser-induced fluorescence, − are currently at the forefront of research in particle image velocimetry (PIV) technology for FIR. Typically, stainless steel and quartz glass probes are utilized for gas sampling to measure local NOx concentrations.…”

Section: Challenges Research Gaps and Perspectivesmentioning

confidence: 99%

“…As computational fluid dynamics (CFD) continues to evolve, an increasing number of scientists have worked digital models to investigate the mechanisms and processes involved in the reduction and generation of NOx. − M. J. Kwon et al numerically investigate the details of NOx reduction in a mid/large-sized combustion system employing a new novel FIR burner, which thoroughly studies with emphasis on the effects of buoyancy and thermal radiation predicts the effects of buoyancy and thermal radiation. At present, there is a growing body of research focused on the creation of open-source computational models for combustion, which are leading to increasingly accurate predictions of flame behavior that more closely align with experimental observations.…”

Section: Challenges Research Gaps and Perspectivesmentioning

confidence: 99%

Review and Perspectives of Novel Flue-Gas Internal Recirculation Combustion Technology for Low Nitrogen Emission: Fundamentals, Performance, Method, and Applications for Conventional Fossil Fuels and Sustainable e-Fuels

Zhu

Wang

2023

Energy Fuels

View full text Add to dashboard Cite

Novel flue-gas internal recirculation (FIR) is gaining increasing attention owing to its overwhelming stable combustion and nitrogen oxide (NOx) reduction advantages. This paper aims to reveal the nitrogen reduction mechanisms in the exciting new FIR methods and discuss the main FIR techniques in terms of combustion performance. In particular, the basic concept and the nitrogen reduction mechanism of FIR are first introduced. Besides, three main categories of FIRs are reviewed in accordance with the characteristics and operation status of different devices. The analysis of 16 FIR systems suggests that the recirculation space, effective recirculation rate, and combustion ignition limit must be considered during the design process, in order to balance NOx reduction and combustion efficiency. The integrated FIR and external FIR can achieve NOx emission reductions of at least 20% and 15.5%−20%, respectively. The embedded FIR exhibits more outstanding NOx emission reduction performance, with NOx reduction ratios of up to 26.09%−65%. In addition, the influence elements of FIR on combustion efficiency and nitrogen reduction are also discussed. In conclusion, strategies aimed at enhancing the combustion performance of novel FIR burners are thoroughly delineated, and the challenges that need to be addressed are succinctly highlighted in a forward-looking perspective. This review is expected to clarify the NOx reduction and combustion characteristics of current FIR techniques and suggest a development direction for FIR design.

show abstract

PLIF measurements of non-thermal NO concentrations in alcohol and alkane premixed flames

Bohon

Guiberti

Roberts

2018

Combustion and Flame

View full text Add to dashboard Cite

Variations in non-thermal NO formation pathways in alcohol flames

Cited by 17 publications

References 48 publications

NO formation in high pressure premixed flames: Experimental results and validation of a new revised reaction mechanism

NO formation in high pressure premixed flames: Experimental results and validation of a new revised reaction mechanism

Review and Perspectives of Novel Flue-Gas Internal Recirculation Combustion Technology for Low Nitrogen Emission: Fundamentals, Performance, Method, and Applications for Conventional Fossil Fuels and Sustainable e-Fuels

PLIF measurements of non-thermal NO concentrations in alcohol and alkane premixed flames

Contact Info

Product

Resources

About