Combustion modelling opportunities and challenges for oxy-coal carbon capture technology

Edge, P.; Gharebaghi, M.; Irons, R.M.A.; Porter, R.; Pourkashanian, Mohamed; Smith, David E.; Stephenson, P.L.; Williams, Alan

doi:10.1016/j.cherd.2010.11.010

Cited by 163 publications

(88 citation statements)

References 175 publications

(211 reference statements)

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“…Previous studies [27,28] found that the exchange of N 2 for CO 2 in oxyfuel combustion does not have much influence on devolatilisation. It was thus deemed su cient for the purpose of this study to represent the devolatilisation of the volatile gases from the coal particle using the single-step reaction rate model [29], which assumes a single reaction for the total weight loss of the volatiles:…”

Section: Coal Combustion Modelmentioning

confidence: 99%

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Franchetti

Marincola

Navarro‐Martinez

et al. 2016

Fuel

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Large Eddy Simulation (LES) has been applied to the swirling 100 kW th OXYCOAL-AC test facility of Aachen University. A set of models to represent devolatilisation, volatile combustion, char combustion and radiation for oxy-coal combustion in an LES framework has been implemented and tested. A qualitative analysis of the flow behaviour and the overall coal combustion processes occurring within the furnace was made. The LES results for the flow field were compared to axial and tangential mean velocity measurements, showing good agreement, particularly in the upstream regions of the flame. The LES results were also compared to oxygen concentrations and gas temperature. Overall good agreement was observed in the upstream central regions of the flame, whilst downstream the LES overestimated the combustion rates. The results show the potential of using LES for more complex oxy-coal combustion burners and opens the way for applications to industrial furnaces.

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Section: Coal Combustion Modelmentioning

confidence: 99%

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Franchetti

Marincola

Navarro‐Martinez

et al. 2016

Fuel

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“…Combustion processes modeled using the EDM are mixing-limited, thus the complex chemical kinetic rates can be neglected [37,38]. The particle combustion process, where heterogenous reaction occurred was divided into several submodels shown in Table 6.…”

Section: Modeling Oxy-fuel Combustionmentioning

confidence: 99%

Modeling oxy-fuel combustion in a 3D circulating fluidized bed using the hybrid Euler–Lagrange approach

Adamczyk

Kozołub

Węcel

et al. 2014

Applied Thermal Engineering

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“…Either a constant approximation [10] or simplified empirical expressions [11] are used for the gas emissivity and equivalent radiating gas temperature. For oxyfuel combustion, these approaches need to be reconsidered due to the fundamental changes in gas properties [12]. This can be done by incorporating a detailed CFD model of the boiler within a full plant process model.…”

Section: Introductionmentioning

confidence: 99%

Integrated fluid dynamics-process modelling of a coal-fired power plant with carbon capture

Edge

Heggs

Pourkashanian

et al. 2013

Applied Thermal Engineering

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a b s t r a c tOxyfuel combustion, where the fuel is combusted in a mixture of pure oxygen and recycled flue gases instead of air, is one of the leading options for carbon capture from coal-fired power plants. Accurate simulation of the operation of such plants is critical for successful development of the technology. A major challenge of such a simulation is how to account for the fundamental differences in gaseous physical and thermal properties; in particular the radiative and convective heat transfer coefficients.In this paper a combined CFD-process approach is developed whereby a detailed CFD model is utilised to represent the complex gas-phase combustion and radiative heat transfer to the furnace walls and the radiant section of the boiler. This is then combined with a full plant process simulation which includes modifications to the heat transfer components to account for differing gas compositions.The novel integrated calculations have been completed for air-firing and for oxyfuel under a range of conditions and a comparison reveals that there is a possible 'working range' of oxygen concentrations/ recycle ratios under which the distribution of heat transfer in the system is similar to air firing and hence the steam conditions can be controlled to set-point temperatures and flows.

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Combustion modelling opportunities and challenges for oxy-coal carbon capture technology

Cited by 163 publications

References 175 publications

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Modeling oxy-fuel combustion in a 3D circulating fluidized bed using the hybrid Euler–Lagrange approach

Integrated fluid dynamics-process modelling of a coal-fired power plant with carbon capture

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