Combustion characteristics of methane–oxygen enhanced air turbulent non-premixed swirling flames

Merlo, Nazim; Boushaki, Toufik; Chauveau, Christian; Persis, S. de; Pillier, Laure; Sarh, Brahim; Gökalp, İskender

doi:10.1016/j.expthermflusci.2013.11.019

Cited by 31 publications

(3 citation statements)

References 40 publications

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“…The configuration of a CNF CC power plant can utilize the pure oxygen produced by the electrolysis, the anodic product of the carbon dioxide splitting, to improve the efficiency of the combustion include happen for a variety of reasons, ranging from a decrease in partial combustion as more oxidant is present, the reduction of NO x present as less nitrogen is available, and the higher temperatures reached which allow for improved thermodynamic efficiency [35][36][37][38][39][40]. This transition to an oxy-fuel combustion process reduces the impurities in the exhaust gas, which will prevent side reaction from occurring in the electrolysis chamber.…”

Section: Carbon Nanofiber Combined Cycle Power Plantmentioning

confidence: 99%

Thermodynamic assessment of CO2 to carbon nanofiber transformation for carbon sequestration in a combined cycle gas or a coal power plant

Lau

Dey

Licht

2016

Energy Conversion and Management

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a b s t r a c tMolten carbonate electrolyzers offer a pathway to capture emitted CO 2 from the flue gas of the power plants and transform this greenhouse gas emission at low energy and high yield instead into a specific, value added, hollow carbon nanofiber product, carbon nanotubes. The present day value of the carbon nanotubes product is $10,000 that of proposed, or in place, current carbon tax costs of $30 per ton, strongly incentivizing carbon dioxide removal. The recent progress in high-temperature molten carbonate electrolysis systems for carbon dioxide utilization and the impact these advances have on developing a CO 2 -free fossil fuel power plant for electricity generation is presented. A thermodynamic model analysis is presented for a molten Li 2 CO 3 electrolysis system incorporated within a combined cycle (CC) natural gas power plant to produce carbon nanofibers (CNF) and oxygen. Such a CC CNF plant system is shown to require 219 kJ to convert one mole of CO 2 to carbon, and generates electricity at higher efficiency due to pure oxygen looped back to the gas turbine input from the CO 2 splitting, with the added advantages that (i) the CC CNF plant emits no CO 2 and (ii) all CO 2 is converted to value added carbon nanotubes useful for strong, lightweight construction, batteries and nanoelectronics. Converting to power and ton units, per metric ton of methane fuel consumed the CC CNF plant is thermodynamically assessed to produce 8350 kW h of electricity and 0.75 ton of CNT and emits no CO 2 , while the CC plant produces 9090 kW h of electricity and emits 2.74 ton CO 2 . The required energy balance for a carbon nanotube production from an analogous coal power plant consumes a larger fraction of the coal energy, and encourages co-generation with renewable electric energy.

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Section: Carbon Nanofiber Combined Cycle Power Plantmentioning

confidence: 99%

Thermodynamic assessment of CO2 to carbon nanofiber transformation for carbon sequestration in a combined cycle gas or a coal power plant

Lau

Dey

Licht

2016

Energy Conversion and Management

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“…In the near field at the burner exit, each jet is composed of two shear layers (ISL and OSL) owing to the annular geometry of the burner. More details about these works can be found in the previous paper of the authors [35][36][37].…”

Section: Swirl Effects On Flamesmentioning

confidence: 99%

Introductory Chapter: Swirling Flows and Flames

Boushaki¹

2019

Swirling Flows and Flames

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Swirling flows are used in a very wide range of industrial applications. In non-reacting cases, examples of applications include vortex amplifiers and reactors, heat exchangers, jet pumps, cyclone separators, whirlpools, tornadoes, etc. In reacting cases, swirlers are widely used in combustion systems, such as gas turbines, industrial furnaces, boilers, gasoline and diesel engines and many other practical heating devices. Effects of using swirl on flow and combustion are significant and various and concern, for example, aerodynamics, mixing, flame stability, intensity of combustion and pollutant emissions. In this chapter, we are interested in the use of swirling flows in combustion systems. In industrial plants, the geometric methods of flame stabilization are based on increasing the residence time of reactive gases either by the wake effect bluff-body burner, by the flow rotation of reactants swirl burner or by a combination of these two mechanisms. Burners with helical flows generally referred to as the swirl burner have very wide applications in the industrial field. In the literature, many examples of uses of swirling jets are found as a means of controlling combustion [1-4]. Other studies focused on the swirl effect on the characteristics of lifted flames [5], stabilization and blow-out phenomenon [6-8] and pollutant emissions [9-13]. 2. Swirl generation techniques There are several ways to generate the rotation of a flow. They can be classified into three main categories:

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“…Oxygenenhanced combustion (OEC) is known as one of the most promising combustion technologies (Wu et al, 2010) because it has several benefits over fueleair combustion, such as a significant increase in thermal efficiency and flame stability, decrease in exhaust gas volume, and flue gas rich in CO 2 , which enables easy CO 2 sequestration (Merlo et al, 2014;S anchez et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Risk assessment of an oxygen-enhanced combustor using a structural model based on the FMEA and fuzzy fault tree

Chen

Qin

2014

Journal of Loss Prevention in the Process Industries

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Combustion characteristics of methane–oxygen enhanced air turbulent non-premixed swirling flames

Cited by 31 publications

References 40 publications

Thermodynamic assessment of CO2 to carbon nanofiber transformation for carbon sequestration in a combined cycle gas or a coal power plant

Thermodynamic assessment of CO2 to carbon nanofiber transformation for carbon sequestration in a combined cycle gas or a coal power plant

Introductory Chapter: Swirling Flows and Flames

Risk assessment of an oxygen-enhanced combustor using a structural model based on the FMEA and fuzzy fault tree

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