A numerical study of the effects of CO2 and H2O on the ignition characteristics of syngas in a micro flow reactor

Ning, Daoguan; Wang, Shixuan; Fan, Aiwu; Yao, Hong

doi:10.1016/j.ijhydene.2018.10.060

Cited by 17 publications

(6 citation statements)

References 53 publications

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“…As expected, the presence of H 2 in the biogas affects the balance of branching reactions shifting the high temperature branching to lower temperatures, thus reducing the negative temperature coefficient (NTC) region with respect to the one of methane. Similar results were found by Ning et al in their studies on ignition delay of syngas. In their paper, the authors confirmed the effect of CO 2 as a third body in the branching reaction of H 2 /O 2 kinetic schemes.…”

Section: Biogas Conversion In Mild Combustionsupporting

confidence: 91%

MILD Combustion and Biofuels: A Minireview

Sabia¹,

Sorrentino

Ariemma³

et al. 2021

Energy Fuels

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Even in the presence of the formidable growth of renewable energy sources, advanced combustion processes have and will continue to have an irreplaceable role as a driving force for energy market. This is indeed motivated by the same huge amount of energy that can be conveniently stored in the form of energy carriers, made available from the renewable sources. The coupling of the appropriate combustion conversion technology with locally available biofuels certainly is among the most effective solutions, now on the table, to face the decarbonization challenge. In this framework, moderate or intense low oxygen dilution (MILD) combustion is among the best candidates to support the transition toward the net zero emission target. Indeed, due to its inherent features, it is highly fuel flexible and efficient, allowing for the utilization of whatever energy carrier can be considered in the decarbonization strategy. It is also characterized by an inherent low or absent pollutant emission. The novelty of this minireview is to highlight the relevance of the kinetics involved in MILD combustion processes with particular focus on biofuels, identifying invariant temperatures, relevant for process stabilization for any energy carrier. A critical evaluation of advantages and drawbacks of the use of raw bioliquids in MILD combustion conditions is reported. Then, challenges, open questions, and future perspectives on the use of biofuel in MILD combustion are discussed.

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Section: Biogas Conversion In Mild Combustionsupporting

confidence: 91%

MILD Combustion and Biofuels: A Minireview

Sabia¹,

Sorrentino

Ariemma³

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…These characters may respectively challenge the ame stability and ignition. Ning et al (2018) reported that water vapor and carbon dioxide increased the ignition temperature of H 2 /O 2 ame, which both steam and carbon dioxide show some negative effects on it. It means that a cooling dewatering process of anode off-gas should be carried out before ame combustion.…”

Section: Introductionmentioning

confidence: 99%

Study on pure oxygen exhaust gas combustion: key technology of CO2 capture for high temperature fuel cell with coal syngas

Wang

Lei

et al. 2021

Preprint

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IGFC based on high temperature SOFC coupled with CO2 capture process provides a new technology route of high efficiency and nearly zero CO2 emission power system. Flame burning is an ideal method for tail gas treatment. In this paper, an oxy-combustor for a gross 10kW IGFC system anode exhaust gas is experimentally and numerically studied. Simulation method is verified by experiments. Key performances of the combustor are studied under different system process design conditions. 315K might be an ideal condensation temperature before burning for flame stability. CO could be almost fully converted under flame burning condition.CO2 concentration after burning is over 0.958 when excess O2 is less than 5%. Overall, 5% excess O2 could be recommended for CO2 gathering and environmental consideration. An optimal tangential angle exists around 25°for liner temperature controlling. Total fuel utilization percent had better be high enough to make oxygen flame temperature of anode exhaust gas lower than 1800K to make systems environment friendly. The results would be of great value to IGFC and CO2 capture combined system designing.

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“…The main characteristics of exhaust gas are its extremely high moisture content and its low calorific value; these features hinder the flame stability and ignition, respectively. Ning et al (2018) reported that water vapor and carbon dioxide increased the ignition temperature of an H 2 /O 2 flame and had some additional negative effects. These results indicated that the anode exhaust gas should be cooled and dried prior to flame combustion.…”

Section: Introductionmentioning

confidence: 99%

Key CO2 capture technology of pure oxygen exhaust gas combustion for syngas-fueled high-temperature fuel cells

Wang

Lei

et al. 2021

Int J Coal Sci Technol

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Integrated gasification fuel cells (IGFCs) integrating high-temperature solid oxide fuel cell technology with CO2 capture processes represents highly-efficient power systems with negligible CO2 emissions. Flame burning with pure oxygen is an ideal method for fuel cell exhaust gas treatment, and this report describes experimental and numerical studies regarding an oxy-combustor for treating the exhaust gas of a 10 kW IGFC system anode. The applied simulation method was verified based on experiments, and the key performance indices of the combustor were studied under various conditions. It was determined that 315 K was the ideal condensation temperature to obtain flame stability. Under these pure oxygen flame burning conditions, CO was almost completely converted, and the dry mole fraction of CO2 after burning was ≥ 0.958 when there was up to 5% excess O2. Overall, 5% excess O2 was recommended to maximize CO2 capture and promote other environmental considerations. Additionally, the optimal tangential fuel jet angle to control the liner temperature was approximately 25°. The total fuel utilization had to be high enough to maintain the oxygen flame temperature of the anode exhaust gas below 1800 K to ensure that the system was environmentally friendly. The results presented herein have great value for designing IGFCs coupled with CO2 capture systems.

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A numerical study of the effects of CO2 and H2O on the ignition characteristics of syngas in a micro flow reactor

Cited by 17 publications

References 53 publications

MILD Combustion and Biofuels: A Minireview

MILD Combustion and Biofuels: A Minireview

Study on pure oxygen exhaust gas combustion: key technology of CO2 capture for high temperature fuel cell with coal syngas

Key CO2 capture technology of pure oxygen exhaust gas combustion for syngas-fueled high-temperature fuel cells

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