Study on Pure Oxygen Exhaust Gas Combustion: Key Technology of CO2 Capture for High Temperature Fuel Cell With Coal Syngas

Abstract 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 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 environment consideration. An optimal tangential angle exists around 25°for liner temperature controlling.Systems with anode cycling might release less CO pollutant in theory for no addition of extra H2O. 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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Study on pure oxygen exhaust gas combustion: key technology of CO2 capture for high temperature fuel cell with coal syngas

10.21203/rs.3.rs-33796/v2 ◽

2020 ◽

Author(s):

Hanlin Wang ◽

Qilong Lei ◽

Pingping Li ◽

Changlei Liu ◽

Yunpeng Xue ◽

...

Keyword(s):

High Temperature ◽

High Efficiency ◽

Flame Temperature ◽

Pure Oxygen ◽

Condensation Temperature ◽

Exhaust Gas ◽

Combined System ◽

Gas Combustion ◽

Capture Process ◽

Gas Treatment

Abstract 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 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 environmental consideration. An optimal tangential angle exists around 25°for liner temperature controlling. Systems with anode cycling might release less CO pollutant in theory for no addition of extra H2O. 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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Study on pure oxygen exhaust gas combustion: key technology of CO2 capture for high temperature fuel cell with coal syngas

10.21203/rs.3.rs-33796/v3 ◽

2021 ◽

Author(s):

Hanlin Wang ◽

Qilong Lei ◽

Pingping Li ◽

Changlei Liu ◽

Yunpeng Xue ◽

...

Keyword(s):

High Temperature ◽

High Efficiency ◽

Flame Temperature ◽

Pure Oxygen ◽

Condensation Temperature ◽

Exhaust Gas ◽

Combined System ◽

Gas Combustion ◽

Capture Process ◽

Gas Treatment

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

International Journal of Coal Science & Technology ◽

10.1007/s40789-021-00445-1 ◽

2021 ◽

Author(s):

Hanlin Wang ◽

Qilong Lei ◽

Pingping Li ◽

Changlei Liu ◽

Yunpeng Xue ◽

...

Keyword(s):

Fuel Cells ◽

High Temperature ◽

Fuel Cell ◽

Flame Temperature ◽

Pure Oxygen ◽

Condensation Temperature ◽

Exhaust Gas ◽

Gas Combustion ◽

Gas Treatment ◽

Oxygen Flame

AbstractIntegrated 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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3-D Computational Fluid Dynamic Analysis of Bustle Gas Combustion in a Direct Reduced Iron Plant

Volume 6: Energy Systems: Analysis, Thermodynamics and Sustainability ◽

10.1115/imece2007-42403 ◽

2007 ◽

Author(s):

William Walker ◽

Ali Farhadi ◽

George Tsvik ◽

Tom Roesel ◽

Naresh K. Selvarasu ◽

...

Keyword(s):

High Temperature ◽

Fluid Dynamic ◽

Three Dimensional ◽

Pure Oxygen ◽

Computational Fluid Dynamic Analysis ◽

Gas Combustion ◽

Flow Rates ◽

Direct Reduced Iron ◽

Computational Fluid Dynamics Cfd ◽

Reducing Gases

Gases from a natural gas reformer are used to reduce iron oxides to iron in the direct reduced iron (DRI) plant. The reducing gases consist of mainly hydrogen and carbon monoxide and traces of methane, water vapor, carbon dioxide and nitrogen. Part of this gas mixture is burned to heat the gases to 1000°C (1832°F) by the injection of pure oxygen through an Inconel nozzle. The oxygen nozzle fails frequently, mainly due to the high temperature reactions. This paper aims to study the reactions that contribute to the high temperature for different oxygen flow rates and thus optimize the flow rates to prevent failure of the nozzle using a three dimensional (3D) computational fluid dynamics (CFD) model.

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Low Btu Coal Gas Combustion in High Temperature Turbines

Volume 1B: General ◽

10.1115/80-gt-170 ◽

1980 ◽

Cited By ~ 2

Author(s):

R. L. Vogt

Keyword(s):

High Temperature ◽

Gas Turbines ◽

Flame Temperature ◽

Temperature Limit ◽

Department Of Energy ◽

Oxides Of Nitrogen ◽

Flammability Limits ◽

Flow Area ◽

Gas Combustion ◽

Coal Gas

This paper defines the combustion consequences of burning low Btu coal gas in high temperature gas turbines. It identifies the limits of their application regarding the heating value and its thermodynamic constraints on turbine firing temperature, operating flammability limits, product carbon monoxide, oxides of nitrogen and combustor turndown ratio. Sensitivity to reaction zone radiation and effects on combustor hot gas path flow area are discussed. The effect of these constraints on the conceptual design of a combustor is described herein. The example discussed is the sectoral combustor which was designed under contract to the Department of Energy for use in the High Temperature Turbine Technology program. The sectoral combustor is to be fired on coal gas to within 250 C of the homogeneous, adiabatic, stoichiometric flame temperature limit.

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Modeling and Design of a High Temperature Chamber Fed by a Plasma Torch for Removal of Tars

20th Annual North American Waste-to-Energy Conference ◽

10.1115/nawtec20-7016 ◽

2012 ◽

Author(s):

Romain Demarthon ◽

Frédéric Marias ◽

Alice Fourcault ◽

Jean Paul Robert-Arnouil

Keyword(s):

High Temperature ◽

Fixed Bed ◽

Pilot Scale ◽

Waste Recycling ◽

Reaction Scheme ◽

Thermochemical Conversion ◽

Condensation Temperature ◽

Reactor Performance ◽

Gas Treatment ◽

Discrete Phase

One way of biomass and/or waste recycling is its thermochemical conversion into combustible gas. Mainly composed of CO,H2 and CH4, the gas may also contain varying amounts of impurities (dust, polluting products, tar or soot). Specifically, there is a tar problem: their high condensation temperature is incompatible with an industrial utilization. They can cause rapid fouling, corrosion and abrasion into turbines or engines. Proposed by EUROPLASMA, the CHO-Power process aims to generate electricity from a mixture of municipal waste and biomass using a fixed bed gasifier with conventional gas treatment. Its specificity consists of an unit called Turboplasma. This stage allows to reach very high temperature in order to obtain temperature around 1600K, and so to degrade all tars present, even heavier. Indeed, EUROPLASMA built a gasification pilot unit based on fluidized bed technology, (called KIWI) to qualify the synthesis gas produced. TURBOPLASMA pilot scale will be installed there. The objective of this work is the design of this high temperature stage thanks to numerical modeling. Reaction scheme used previously [4] to modelize tar degradation in the Turboplasma of CHO-Power, has been improved: a discrete phase modeling has been added providing a better view of the TURBOPLASMA internal behavior. Indeed, char particles from syngas can significantly change the reactor performance. This study shows that char particles react primarily with the H2O and CO2. Char gasification takes place in areas of high velocity and temperature gradient. Increased understanding of aerodynamics inside the reactor allows a better estimate of the overall performance of the reactor. Performance evaluation of the reactor is based on a set of parameters such as levels of heat loss, velocity gradient, mixing quality, residence time.

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The Potential of Photoelectrochemical Carbon Sinks

10.26434/chemrxiv.6231140.v2 ◽

2018 ◽

Author(s):

Matthias May ◽

Kira Rehfeld

Keyword(s):

Global Warming ◽

High Temperature ◽

Greenhouse Gas ◽

Large Scale ◽

High Efficiency ◽

Carbon Sink ◽

Solar Fuels ◽

Negative Emissions ◽

Viable Approach ◽

Low Sensitivity

Greenhouse gas emissions must be cut to limit global warming to 1.5-2C above preindustrial levels. Yet the rate of decarbonisation is currently too low to achieve this. Policy-relevant scenarios therefore rely on the permanent removal of CO2 from the atmosphere. However, none of the envisaged technologies has demonstrated scalability to the decarbonization targets for the year 2050. In this analysis, we show that artificial photosynthesis for CO2 reduction may deliver an efficient large-scale carbon sink. This technology is mainly developed towards solar fuels and its potential for negative emissions has been largely overlooked. With high efficiency and low sensitivity to high temperature and illumination conditions, it could, if developed towards a mature technology, present a viable approach to fill the gap in the negative emissions budget.

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The Potential of Photoelectrochemical Carbon Sinks

10.26434/chemrxiv.6231140 ◽

2018 ◽

Author(s):

Matthias May ◽

Kira Rehfeld

Keyword(s):

Global Warming ◽

High Temperature ◽

Greenhouse Gas ◽

Large Scale ◽

High Efficiency ◽

Carbon Sink ◽

Solar Fuels ◽

Negative Emissions ◽

Viable Approach ◽

Low Sensitivity

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REMANIT 4509

Alloy Digest ◽

10.31399/asm.ad.ss0613 ◽

1995 ◽

Vol 44 (9) ◽

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Physical Properties ◽

Exhaust System ◽

Heat Treating ◽

Exhaust Gas ◽

Gas Purification ◽

Temperature Performance ◽

Scale Resistance ◽

High Degree

Abstract REMANIT 4509 was developed specially for silencers and exhaust gas purification plants. Due to its composition, this steel exhibits scale resistance up to 950 C and a high degree of corrosion resistance to the gases occurring in the exhaust system. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-613. Producer or source: Thyssen Stahl AG.

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