Investigation of nitric oxide formation in methane, methane/propane, and methane/hydrogen flames under condensing gas boiler conditions

Hinrichs, Jörn; Hellmuth, Maximilian; Meyer, Felix; Kruse, Stephan; Plümke, Marco; Pitsch, Heinz

doi:10.1016/j.jaecs.2020.100014

Cited by 7 publications

(3 citation statements)

References 47 publications

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“…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%

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

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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.

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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

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“…The production of nitrogen oxides (NOx) during the combustion of fuels with air causes significant environmental damage. NOx emissions, which include the gases nitric oxide (NO) and nitrogen dioxide (NO2), contribute to ozone depletion, cause photochemical smog, and endanger human health and the stratospheric protective ozone layer [3,4]. As a result, it is necessary to investigate NOx emissions caused by PDE and potential ways to reduce them.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of NOx Reduction in a Hydrogen-Fueled Pulse Detonation Engine

Mahammadsalman Warimani,

Fharukh Ahmed Ghasi Mahaboobali,

Sher Afghan Khan

et al. 2024

ARFMTS

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A change in combustion concepts from conventional isobaric to constant volume combustion (CVC) has several advantages. Pulse detonation combustion (PDC) operates on CVC, increasing the engine's thermodynamic efficiency significantly. Little research has been conducted on pollutant emissions from pulse detonation engines (PDE). Because PDE burns at a higher temperature, it emits more NOx. The formation of NOx is investigated in this paper using the computational fluid dynamics (CFD) method. For hydrogen fuel, a model is built by varying pressure, temperature, spark size, and geometry. The SST K- Omega model is used with transient conditions. EINOx was calculated using CFD analysis for 12 cm and 20 cm tubes. The results were encouraging. A 12 cm tube produced 200 g/kg of fuel EINOx, while a 20 cm tube produced 250 g/kg of fuel EINOx. The computed results are consistent with previous literature.

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“…The generation of nitrogen oxides (NOx) while burning fuels with air cause severe environmental damage. NOx emissions, which include the gases nitric oxide (NO) and nitrogen dioxide (NO 2 ), contribute to ozone depletion, generate photochemical smog, and are hazardous to human health and the depletion of the protective ozone layer in the stratosphere 2,3 . So, it is necessary to examine NOx emission caused by PDE and possible ways to minimize it.…”

Section: Introductionmentioning

confidence: 99%

Performance characteristics of combustion and emission in pulse detonation engine

Warimani¹,

Bellary²,

Teli

et al. 2023

Preprint

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A shift in combustion concepts from conventional isobaric to constant volume combustion (CVC) has various benefits. Pulse detonation combustion (PDC) works on CVC, significantly increasing the engine's thermodynamic efficiency. Pollutant emissions from pulse detonation engines (PDE) have received little research. PDE has higher temperature combustion, resulting in a higher NOx emission. In the present paper, the formation of NOx is investigated using the computational fluid dynamics (CFD) method. A model is constructed by varying pressure, temperature, spark size, and geometry for hydrogen fuel. SST K- Omega model with transient conditions is used. CFD analysis was performed to calculate EINOx for 12 cm and 20 cm tubes. Encouraging results were obtained. The size of 12 cm tube produced EINOx of 200 g/kg of fuel, and a 20 cm tube produced 250 g/kg of fuel. Computed results are in good agreement with previous literature.

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Investigation of nitric oxide formation in methane, methane/propane, and methane/hydrogen flames under condensing gas boiler conditions

Cited by 7 publications

References 47 publications

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

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

Numerical Investigation of NOx Reduction in a Hydrogen-Fueled Pulse Detonation Engine

Performance characteristics of combustion and emission in pulse detonation engine

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