SE-SMR process performance in CFB reactors: Simulation of the CO2 adsorption/desorption processes with CaO based sorbents

Wang, Yuefa; Chao, Zhongxi; Chen, De; Jakobsen, Hugo A.

doi:10.1016/j.ijggc.2010.09.001

Cited by 48 publications

(17 citation statements)

References 31 publications

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“…More difficult problems arise in the case of additional heat and mass transfer between particles and fluid, possibly with simultaneous occurrence of chemical reactions. However, considering the SE‐SMR process, the chemical performance predicted by Wang et al., Chao et al., Wang et al . and Chao is of minor difference applying a two‐dimensional or three‐dimensional model approach.…”

Section: Resultsmentioning

confidence: 99%

“…proposed a three‐phase flow model with the aim to investigate the effect of segregation in the SE‐SMR process. For the purpose of investigating the effect of solid transport between the reformer and regeneration reactor on the performance of the SE‐SMR process, Wang et al . numerically coupled a bubbling bed and a riser simulating a circulating fluidised bed design.…”

Section: Introductionmentioning

confidence: 99%

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Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

2013

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Computational demanding two‐ and three‐dimensional two‐fluid models are frequently adopted simulating gas–solid flows in fluidised beds. Reduced computational cost is favourable for efficient numerical studies of technologies such as the novel chemical looping combustion (CLC), chemical looping reforming (CLR), and sorption‐enhanced steam methane reforming (SE‐SMR) processes. In this study, we elucidate the potential of a one‐dimensional two‐fluid model to describe gas–solid cold‐flows in fluidised beds. The validity of the numerical simulation results of the bubbling beds and risers have been compared to experimental data in the literature. Moreover, sensitivity analyses on drag closure laws and operation condition have been performed and a number of model solution techniques and algorithms are studied. In addition, simulation results of the one‐dimensional model are compared to results of a two‐dimensional model. For particular sets of operating conditions and flow characteristics, the one‐dimensional model compares fairly well to the simulation results of the two‐dimensional model and to experimental data. Under other operating conditions, large quantitative deviations can be observed. However, the one‐dimensional model is assumed to be sufficently accurate for particular reactor process optimisation and design evaluations.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

2013

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“…48 This Euler-Euler model with KTGF is suitable and widely used for uidization systems that have a large amount of solid particles. 30,31,38,40,42,43,[49][50][51][52][53][54][55] There are many research studies that used the Euler-Euler approach with KTGF for the simulations of uidization either without a reaction (cold ow) 50,[56][57][58] or with a reaction (hot ow). 30,31,40,42,43,49,[51][52][53][54][59][60][61] The cold ow validations were presented in some studies to prove the suitability of the models using the Euler-Euler approach with KTGF and were used as a base case for further hot ow simulations.…”

Section: Computational Uid Dynamicsmentioning

confidence: 99%

“…The CFBR efficiency for SESRE still has not been unveiled; thus, the riser design for SESRE will be further studied. [39][40][41] As the CFBR system must be experimented at least on a pilot scale with appropriate design and operation, each trial of the experiments can waste expensive resources, particularly expensive materials such as the Ni-based catalyst. Consequently, computational uid dynamics (CFD) have been utilized for the initial design of an optimal system before testing in real operations.…”

Section: Introductionmentioning

confidence: 99%

Factorial design analysis of parameters for the sorption-enhanced steam reforming of ethanol in a circulating fluidized bed riser using CFD

et al. 2018

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“…The SE-SMR process operated in fluidized bed reactors have been described with different levels of complexity ranging from the simpler Kunii-Levenspiel type models [5] to rigorous multi-fluid models based on kinetic theory of granular flows (KTGF) [17,16,14,7]. Adopting a Kunii-Levenspiel model [6], the solids are commonly assumed to be stagnant in the reactor.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Sorption-Enhanced Steam Methane Reforming Process Operated in Fluidized Bed Reactors: A Dynamic One-Dimensional Two-Fluid Model

Solsvik¹,

Chao²

Proceedings of the Eighth International Conference on Engineering Computational Technology

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The aim of the study described in this paper is to derive a fluidised bed reactor model that improve the description of the reactor performance relative to the Kunii-Levenspiel type of models frequently used in chemical reactor engineering. The classical SIMPLE algorithm is extended to compressible multiphase reactive flows. The suggested one-dimensional Eulerian-Eulerian two-fluid model is applied to investigate the reactive gas-solid flows of the SE-SMR processes.Whereas the Kunii-Levenspiel models generally assumes a prescribed solid flux within the fluidised bed reactors, the two-fluid model derived in this study serves as highly relevant in the progress of commercial reactors for processes such as the novel SE-SMR technology because the solid flux incorporated in the two-fluid model allows for dynamic modeling of interconnected fluidized bed reactors. Moreover, the twoand three dimensional two-fluid models are yet too computational demanding due to the complexity of the gas-solid flow in the bed. Hence, these models are not efficient for studies of the processes such as the SE-SMR technology where the solid particles are transferred between reactor units for utilization and recover of the characteristic solid property, i.e. CO 2 -capture and CO 2 -release.

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SE-SMR process performance in CFB reactors: Simulation of the CO2 adsorption/desorption processes with CaO based sorbents

Cited by 48 publications

References 31 publications

Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

Factorial design analysis of parameters for the sorption-enhanced steam reforming of ethanol in a circulating fluidized bed riser using CFD

Simulation of the Sorption-Enhanced Steam Methane Reforming Process Operated in Fluidized Bed Reactors: A Dynamic One-Dimensional Two-Fluid Model

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