Evaluation of the influence of OEC on soot formation and thermal radiation in confined acetylene diffusion flames

Santos, Alex Álisson Bandeira; Torres, Ednildo Andrade; Pereira, Pedro A. P.

doi:10.1016/j.icheatmasstransfer.2012.10.004

Cited by 6 publications

(4 citation statements)

References 23 publications

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“…Another strategy documented in the patents and also found in the literature is the use of O 2 to enhance the combustion process. First mentioned by Baukal (1998) [38], OEC is a process that involves enriching the intake air for combustion with O 2 ; it provides good results, including higher productivity, better thermal efficiency, a lower volume of exhaust gas, greater efficiency in heat transfer processes, reduction in fuel consumption, cost reduction in raw material, and greater flame characteristics, which promote stability and shape control [1,39,40]. Patent EP2284130A1 (2011) refers to a new method of producing mineral wool using a cupola furnace, where the combustion chamber is fed with fuel and O 2 gas.…”

Section: Resultsmentioning

confidence: 99%

Patent Analysis of the Development of Technologies Applied to the Combustion Process

et al. 2022

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The use of combustion in industrial activity is of paramount importance for economic and social development. However, combustion reactions are the main sources of atmospheric pollutant emissions. Given this reality, it is necessary to study new combustion techniques, such as the application of oxygen in the process, in order to increase the efficiency and productivity of the burning process and energy production. In addition, studies have reported the use of acoustic excitation, a low-investment technique that can promote higher rates of heat and mass transfer. Thus, the goal of this study was to bring data on the current scenario related to the application of these two technologies to the combustion process where, through the reported results, they can be used as a guide for companies’ decisions about new technologies and global trends to be identified. For this, a technological prospection was carried out which focused on patents to investigate the use of oxygen-enhanced combustion and acoustic excitation coupled to the combustion process; a total of 88 documents were found. Few documents applied acoustic excitation for process improvement, indicating that its use is recent; however, according to the literature, it is a promising field to be explored. Siemens AG was the main depositor, and ten primary inventors were identified. Germany and the United States were the countries with the highest number of filings. In the prospected documents, it was possible to identify that there is a need for the further investigation of the joint use of both techniques. These investigations may lead to the development of processes and devices that can provide economic and environmental gains for the energy industry.

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Section: Resultsmentioning

confidence: 99%

Patent Analysis of the Development of Technologies Applied to the Combustion Process

et al. 2022

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“…Under the same oxygen partial pressure as air condition, the combustion temperature in O 2 /CO 2 combustion was lower than that in conventional combustion 2,21 . With the increase of O 2 concentration, the combustion temperature increases to a certain extent, and the flue gas in the furnace has stronger radiation characteristics and convective heat transfer ability 21–24 . In addition, according to measuring soot in acetylene and natural gas flames, its concentration was found to increase with the increase of oxygen content.…”

Section: Introductionmentioning

confidence: 95%

“…2,21 With the increase of O 2 concentration, the combustion temperature increases to a certain extent, and the flue gas in the furnace has stronger radiation characteristics and convective heat transfer ability. [21][22][23][24] In addition, according to measuring soot in acetylene and natural gas flames, its concentration was found to increase with the increase of oxygen content. Many studies 25,26 have shown that O 2 /CO 2 combustion can reduce NOx emissions.…”

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confidence: 99%

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Zhang

et al. 2022

Greenhouse Gases

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A numerical model of a 75 t/h gas‐fired boiler burning blast furnace gas (BFG) and coke oven gas (COG) was developed to study the effect of O2/CO2 conditions on the combustion characteristics, verified by comparing with the results measured in field experiments. The results showed that the ignition distance of COG was shorter than that of BFG, and COG reached the stable combustion temperature of 1000 K earlier in the condition of O2/CO2 combustion with 31% O2 than in the condition of air combustion. Under different O2/CO2 conditions, the overall temperature of gas‐fired boiler decreased. The maximum temperature of air combustion, O2/CO2 combustion with 26% O2, and O2/CO2 combustion with 31% O2 were 1867, 1678, and 1834 K, respectively. Under the condition of O2/CO2 combustion, the radiation heat transfer of mixed gas was enhanced, and the overall heat flux was obviously improved. Under the O2/CO2 condition, the overall temperature was lower than that of air combustion, but the wall heat flux increased. The NOx production decreased after the change to O2/CO2 combustion, and the NOx generation at the furnace arch decreased from 70.28 mg/m3 to 6.94 mg/m3 under the condition of O2/CO2 combustion with 26% O2. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…Combustion data were obtained from an experiment performed in an apparatus consisting of a combustion chamber coupled with instruments to analyze gases and soot and to measure thermal radiation (Fig. 2) [20]. The experimental device has a burner composed of two concentric tubes where a flame is generated in the chamber.…”

Section: Introductionmentioning

confidence: 99%

Fractal aspects in O2 enriched combustion

Souza

Santos

Guarieiro

et al. 2015

Physica A: Statistical Mechanics and its Applications

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Evaluation of the influence of OEC on soot formation and thermal radiation in confined acetylene diffusion flames

Cited by 6 publications

References 23 publications

Patent Analysis of the Development of Technologies Applied to the Combustion Process

Patent Analysis of the Development of Technologies Applied to the Combustion Process

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Fractal aspects in O2 enriched combustion

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Evaluation of the influence of OEC on soot formation and thermal radiation in confined acetylene diffusion flames

Cited by 6 publications

References 23 publications

Patent Analysis of the Development of Technologies Applied to the Combustion Process

Patent Analysis of the Development of Technologies Applied to the Combustion Process

Numerical investigation of blast furnace gas and coke oven gas combustion under different O2/CO2 environments

Fractal aspects in O2 enriched combustion

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Product

Resources

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Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments