Numerical investigation of diluent influence on flame extinction limits and emission characteristic of lean-premixed H2–CO (syngas) flames

Ding, Nan; Arora, Rajat; Norconk, Michael; Lee, Seong-Young

doi:10.1016/j.ijhydene.2010.11.097

Cited by 40 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, in these experiments, the temperature was approximately 1300e1600 C for the flames without dilution. In syngas studies, Ding et al concluded that the NNH route becomes the dominant route in NO formation in impure syngas [27], Sahu et al found that the NNH and N 2 O intermediate pathways are the major contributors for NO formation in all the reaction mechanisms except GRI 3.0 in syngas diffusion flames [9], and Shih et al declared NNH and N 2 O routes also are the primary NO formation paths [13]. In this paper, combustion would not generate abundant thermal NO x at this relatively low temperature level, and the NNH and N 2 O routes perhaps are the primary NO formation paths.…”

Section: No X Emission Characteristicsmentioning

confidence: 99%

Temperature and emissions characteristics of a micro-mixing injection hydrogen-rich syngas flame diluted with N2

Zhang

Tian

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Section: No X Emission Characteristicsmentioning

confidence: 99%

Temperature and emissions characteristics of a micro-mixing injection hydrogen-rich syngas flame diluted with N2

Zhang

Tian

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

“…Finally, the NO formation through NNH route involves reactions: N 2 + H ⇒ NNH and NNH + O ⇒ NO + NH (Bozzeli and Deam 1995). Ding et al (2011) investigated NO x formation in lean premixed syngas counterflow flames and observed that the NO was formed predominantly through the NNH and N 2 O intermediate routes. The contribution of thermal NO was small due to the low-flame temperatures.…”

Section: Syngas Combustion and Emission Characteristicsmentioning

confidence: 99%

Using Petroleum and Biomass-Derived Fuels in Duel-fuel Diesel Engines

Xiao

2014

Novel Combustion Concepts for Sustainable Energy Development

View full text Add to dashboard Cite

There is worldwide interest in developing renewable energy sources in a sustainable manner. Syngas and biogas offer significant potential in this context, as these fuels offer great flexibility with regard to their production and utilization. This chapter provides an overview of research dealing with the combustion and emission characteristics of these fuels, both as stand-alone fuels or by blending with petroleum fuels. Conversion methods for producing these fuels from different biomass sources are also briefly reviewed. While the syngas composition can vary widely, it generally has lower heating value, lower density, higher mass diffusivity, higher flame speeds, and wider flammability limits compared to hydrocarbon fuels. Moreover, its combustion leads to almost zero soot emission, although NO x emission may be a concern depending upon its composition and operating temperatures. Similarly, biogas has lower heating value compared to hydrocarbon fuels, and its ignition and combustion characteristics can vary noticeably depending upon its composition. While there have been few studies focusing directly on biogas combustion, there is extensive literature on methane combustion, including ignition, extinction, flammability limits, flame speeds, cellular instabilities, and emissions. Fundamental combustion aspects requiring further research include cellular instabilities, flame stabilization and blowout behavior, turbulent flames, and emission characteristics. Such efforts would lead to the development of optimized systems for producing these fuels and provide guidelines for optimizing their composition for a given set of operating conditions. The use of syngas and biogas in dual-fuel diesel engines has been a subject of numerous experimental and computational studies. A general observation is that the engine performance and emission characteristics are significantly modified by the presence of gaseous fuel. While the heat release in a diesel engine generally occurs through a hybrid combustion mode, involving rich premixed combustion and diffusion combustion, that in a dual-fuel engine also involves a lean combustion mode with a propagating flame. The dualfuel operation at high-load conditions can provide significant reduction in soot and CO soot emissions, while maintaining the engine efficiency, provided the injection characteristics including the amount of pilot fuel can be optimized. However, the NO x emission may increase, requiring a suitable strategy for lowering the temperatures. The dual-fuel strategy may be less effective at low load, resulting in lower thermal efficiency and higher UHC and CO emissions. Future work should be directed at optimizing the various parameters, such as injection timing, amount of pilot fuel injected, EGR, and multiple injections.

show abstract

“…Most of these researchers used inert components such as steam, N or CO as an additive to evaluate impact of these components on fundamental combustion properties [1][2][3][4][5]. Aside from adding inert or active components [6][7][8][9], relative e ect of gas components on ame behaviour has also been investigated [10,11].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on premixed CNG/H2/CO2 mixture flames

Yılmaz

Çam

2018

Open Engineering

View full text Add to dashboard Cite

Abstract:In this study, the e ect of swirl number, gas composition and CO dilution on combustion and emission behaviour of CNG/H /CO gas mixtures was experimentally investigated in a laboratory scale combustor. Irrespective of the gas composition, thermal power of the combustor was kept constant (5 kW). All experiments were conducted at or near stoichiometric and the local atmospheric conditions of the city of Kayseri, Turkey. During experiments, swirl number was varied and the combustion performance of this combustor was analysed by means of centreline temperature distributions. On the other hand, emission behaviour was examined with respect to emitted CO, CO and NOx levels. Dynamic ame behaviour was also evaluated by analysing instantaneous ame images. Results of this study revealed the great impact of swirl number and gas composition on combustion and emission behaviour of studied ames.

show abstract

Numerical investigation of diluent influence on flame extinction limits and emission characteristic of lean-premixed H2–CO (syngas) flames

Cited by 40 publications

References 24 publications

Temperature and emissions characteristics of a micro-mixing injection hydrogen-rich syngas flame diluted with N2

Temperature and emissions characteristics of a micro-mixing injection hydrogen-rich syngas flame diluted with N2

Using Petroleum and Biomass-Derived Fuels in Duel-fuel Diesel Engines

An experimental study on premixed CNG/H2/CO2 mixture flames

Contact Info

Product

Resources

About