Computational fluid dynamic simulations of chemical looping fuel reactors utilizing gaseous fuels

Mahalatkar, Kartikeya; Kuhlman, John M.; Huckaby, E. David; O’Brien, Thomas J.

doi:10.1016/j.ces.2010.11.003

Cited by 72 publications

(41 citation statements)

References 20 publications

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“…CFD models have been used to simulate the performance of small facilities up to 1 kW th [351][352][353] showing a good fit between experimental results and theoretical predictions.…”

Section: Model Validationmentioning

confidence: 99%

“…Most of CFD models have been developed for reactors in batch mode, without solids circulation, or for small scale CLC systems (300-1000 W th ). Important progress has been done validating the CFD models with experimental results obtained in small-scale facilities using gaseous fuels [351][352][353], or coal [354]. Up to date, the more complete modelling of a CLC system using CFD codes is the simulation of a bubbling fluidized bed for the fuel-reactor coupled to a riser for the air-reactor using methane as fuel and Mn-or Ni-based oxygen-carriers [349,350].…”

Section: Fluid Dynamicsmentioning

confidence: 99%

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Progress in Chemical-Looping Combustion and Reforming technologies

Adánez

Abad

Garcı́a-Labiano

et al. 2012

Progress in Energy and Combustion Science

1,968

1,614

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This work is a comprehensive review of the Chemical-Looping Combustion (CLC) and Chemical-Looping Reforming (CLR) processes reporting the main advances in these technologies up to 2010. These processes are based on the transfer of the oxygen from air to the fuel by means of a solid oxygen-carrier avoiding direct contact between fuel and air for different final purposes. CLC has arisen during last years as a very promising combustion technology for power plants and industrial applications with inherent CO 2 capture which avoids the energetic penalty present in other competing technologies.CLR uses the chemical looping cycles for H 2 production with additional advantages if CO 2 capture is also considered.The review compiles the main milestones reached during last years in the development of these technologies regarding the use of gaseous or solid fuels, the oxygen-carrier development, the continuous operation experience, and modelling at several scales. Up to 2010, more than 700 different materials based on Ni, Cu, Fe, Mn, Co, as well as other mixed oxides and low cost materials, have been compiled. Especial emphasis has been done in those oxygen-carriers tested under continuous operation in Chemical-Looping 2 prototypes. The total time of operational experience (≈ 3500 h) in different CLC units in the size range 0.3-120 kW th , has allowed to demonstrate the technology and to gain in maturity. To help in the design, optimization, and scale-up of the CLC process, modelling work is also reviewed. Different levels of modelling have been accomplished, including fundamentals of the gas-solid reactions in the oxygen-carriers, modelling of the air-and fuel-reactors, and integration of the CLC systems in the power plant. Considering the great advances reached up to date in a very short period of time, it can be said that CLC and CLR are very promising technologies within the framework of the CO 2 capture options.

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“…CFD models have been used to simulate the performance of small facilities up to 1 kW th [351][352][353] showing a good fit between experimental results and theoretical predictions.…”

Section: Model Validationmentioning

confidence: 99%

Section: Fluid Dynamicsmentioning

confidence: 99%

Progress in Chemical-Looping Combustion and Reforming technologies

Adánez

Abad

Garcı́a-Labiano

et al. 2012

Progress in Energy and Combustion Science

1,968

1,614

View full text Add to dashboard Cite

show abstract

“…Solid fuel conversion was first considered through multiphase CFD by Mahalatkar et al [21]. Extensive comparisons of results from different experimental setups from the literature with multiphase CFD simulations were performed by the same group of authors [22], indicating good agreement and therefore suitability of CFD methods. A nonreacting chemical looping model of a coupled fuel and air rector setup was investigated by Shuai et al [23] who characterized the developing flow structures.…”

Section: Introductionmentioning

confidence: 99%

Heat and Mass Flow Control in an Interconnected Multiphase CFD Model for Chemical Looping Combustion

Kruggel‐Emden

Scherer

2011

Chem Eng & Technol

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Chemical looping combustion is a feasible option for carbon capture from fossil fuels. Within the process, the oxygen necessary for combustion is provided by a solid carrier material which alternately undergoes oxidation and reduction reactions. Features of the process are that the oxidation reaction of the particulate carrier in the air reactor is strongly exothermic and that the conversion of both oxidation and reduction reactions has to be in balance for stable operation. Simulations of the transient behavior of chemical looping combustion systems are possible through multiphase CFD. To allow for the modeling of chemical looping at steady state, cooling of the reactors and mass flow between fuel and air reactor must be adequately adjusted. Therefore, an interconnected multiphase CFD model was extended by an adjustment control. In this extended modeling framework variations of the operational load, control set points and carrier materials were performed. These simulations allow detailed insight into the dynamic behavior of chemical looping systems.

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“…Some efforts have been carried out on the CFD simulation of chemical looping combustion processes [10,[16][17][18][19][20][21][22][23][24][25][26][27][28][29]. However, only a few investigations have been focused on the full loop simulation of the interconnected fluidized bed, due to the complexities in geometry and flow physics, which requires large computational resources [1,28].…”

Section: Fig 1 Schematic Of Chemical Looping Combustion Processmentioning

confidence: 99%

Three-dimensional full loop simulation of solids circulation in an interconnected fluidized bed

et al. 2016

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract 3-D full loop CFD simulation of solids circulation rate is conducted in a complicated circulating-fluidized bed, which consists of a riser, a bubbling bed, a cyclone and a loop-seal. The effects of operating gas velocity, particle diameter and total solids inventory on the solids circulation rate are investigated based on the system pressure balance of an interconnected fluidized bed. CFD results indicate that the gas velocity in the riser plays a dominant role in controlling the solids circulation rate, whilst the gas velocity in the pot-seal influences in a narrow operating range. The solids circulation rate is strongly influenced by particle diameter and total solids inventory, but becomes insensitive to the operating conditions in the bubbling bed as the gas velocity is higher than the minimum fluidization velocity.

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Computational fluid dynamic simulations of chemical looping fuel reactors utilizing gaseous fuels

Cited by 72 publications

References 20 publications

Progress in Chemical-Looping Combustion and Reforming technologies

Progress in Chemical-Looping Combustion and Reforming technologies

Heat and Mass Flow Control in an Interconnected Multiphase CFD Model for Chemical Looping Combustion

Three-dimensional full loop simulation of solids circulation in an interconnected fluidized bed

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