Integration of carbon capture in IGCC systems

Carpenter, Steven M.; Long, Henry A.

doi:10.1016/b978-0-08-100167-7.00036-6

Cited by 20 publications

(13 citation statements)

References 6 publications

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“…45 The total emissivity (εÞ, in terms of weighted sum of gray gasses, is calculated using Equation (7), where κ i , L, and P correspond to the adsorption coefficient, gas layer thickness, and partial pressure of the absorbing gasses, respectively. The term α ε,i stands for the emissivity weighting factor for the gray gas i at temperature T (i.e., α ε,i ) can be approximated using Equation (8), where b ε,i,j is emissivity gas temperature polynomial coefficient. The values of b ε,i,j and κ i in different conditions can be obtained from the experimental investigations by Coppalle and Vervisch 46 and Smith et al 47…”

Section: Radiation Modelmentioning

confidence: 99%

“…7 The EGR becomes even more beneficial in combustion with pure oxygen, commonly known as oxy-fuel combustion. 8,9 Unlike the air-fuel counterpart, oxy-combustion burns the fuel in pure oxygen without the presence of nitrogen inside the combustor. Due to the nitrogen-free environment, there is no NOx emission from the combustion process and results mainly in CO 2 and H 2 O in the tail pipe.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Haque

Nemitallah

Abdelhafez

et al. 2022

Intl J of Energy Research

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Premixed oxy-combustion flames of methane, syngas (CH 4 :CO:H 2 with the molar ratio of 2:1:1), and propane in CO 2 -diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (T ad ), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic "V" shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of T ad , LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights• Increasing equivalence ratio improves the flame characteristics but increases CO emission.• Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ).• Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO.

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Section: Radiation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Haque

Nemitallah

Abdelhafez

et al. 2022

Intl J of Energy Research

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“…According to Kerester [5], more than 90% of the carbon from syngas is able to be obtained as carbon dioxide and is either used or stored. Carbon dioxide capture is necessary due to increasing environmental restrictions on coal-fired power generating units [6]. Carbon dioxide capture and usage in downstream operation is very common in gasification-based ammonia plants.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Natural and Synthetic Petroleum Coke Slag Viscosities under Reducing Conditions: Applicability of Predictive Models Using Factsage and Modified Urbain Model

D’Souza

Banik

Vuthaluru

et al. 2021

Fuels

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The viscosity of slag from an operating integrated gasification combined cycle (IGCC) plant utilising petroleum coke and a synthetic petcoke slag with the same composition made from chemical grade oxides in a reducing environment for gasification application were investigated in this study. A high temperature rotating bob-type viscometer was used to measure viscosity between temperatures of 1250–1375 °C. Natural and synthetic ash had similar viscosities above 1300 °C in this study. The viscosity was predicted by using FactSage, a thermodynamic modelling software, in conjunction with different viscosity models, available in the open literature. Percentage deviations of predicted viscosities from different models with experimentally measured values ranged from about 41 to 151%. Crystallisation of the slag was noted in SEM-EDS (scanning electron microscopy– energy dispersive spectroscopy) and FactSage results. Solid phases from FactSage predictions were used to modify the Kalmanovitch–Frank model with the Roscoe method. It predicted the viscosity of the slag accurately between 1250 and 1375 °C. Average percentage deviation from measured natural ash viscosity was about 11%.

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“…A number of R&D activities have been done on carbon capture and storage technologies. For pre-combustion capture, an integrated gasification combined cycle (IGCC) has been proposed, through which fossil fuels will be gasified into a high pressure synthesis gas (syngas) before steam is injected to extract CO 2 gas through a series of catalyst beds (Carpenter et al, 2017). For post-combustion capture, one of the most commercialized technologies is wet scrubbing with an aqueous solution of monoethanolamine (MEA) (Wang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

CO2 Capture for Dry Reforming of Natural Gas: Performance and Process Modeling of Calcium Carbonate Looping Using Acid Based CaCO3 Sorbent

et al. 2021

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Several industrial activities often result in the emissions of greenhouse gases such as carbon dioxide and methane (a principal component of natural gas). In order to mitigate the effects of these greenhouse gases, CO2 can be captured, stored and utilized for the dry reforming of methane. Various CO2 capture techniques have been investigated in the past decades. This study investigated the performance and process modeling of CO2 capture through calcium carbonate looping (CCL) using local (Malaysia) limestone as the sorbent. The original limestone was compared with two types of oxalic acid-treated limestone, with and without aluminum oxide (Al2O3) as supporting material. The comparison was in terms of CO2 uptake capacity and performance in a fluidized bed reactor system. From the results, it was shown that the oxalic acid-treated limestone without Al2O3 had the largest surface area, highest CO2 uptake capacity and highest mass attrition resistance, compared with other sorbents. The sorbent kinetic study was used to design, using an Aspen Plus simulator, a CCL process that was integrated with a 700 MWe coal-fired power plant from Malaysia. The findings showed that, with added capital and operation costs due to the CCL process, the specific CO2 emission of the existing plant was significantly reduced from 909 to 99.7 kg/MWh.

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Integration of carbon capture in IGCC systems

Cited by 20 publications

References 6 publications

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Comparison of Natural and Synthetic Petroleum Coke Slag Viscosities under Reducing Conditions: Applicability of Predictive Models Using Factsage and Modified Urbain Model

CO2 Capture for Dry Reforming of Natural Gas: Performance and Process Modeling of Calcium Carbonate Looping Using Acid Based CaCO3 Sorbent

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