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Keywords: fluidized bed, two-fluid model, algorithm, sorption-enhanced steam methane reforming, multiphase reactive flow.

Summary

The aim of the study, described in this paper, is to derive a fluidized bed reactor model that improves 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 dynamic one-dimensional Eulerian-Eulerian two-fluid model is applied to investigate the reactive gas-solid flows of the sorption-enhanced steam methane reforming (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 is 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 the dynamic modelling of interconnected fluidised bed reactors. Moreover, the two- and three dimensional two-fluid models are as yet too computationally demanding as a result of 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 utilisation and recovery of the characteristic solid property, i.e. CO₂-capture and CO₂-release.

The simulation results of the dynamic one-dimensional model are in fair agreement with the two-dimensional model considering the species concentration and temperature predictions of the SMR and SE-SMR processes. On the other hand, deviations between the one- and two-dimensional models are observed for the phase area fractions and the gas phase velocity. This deviation may be related to the gas bubble effect that is not included in the one-dimensional model.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 100 PROCEEDINGS OF THE EIGHTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: B.H.V. Topping Paper 127 Simulation of the Sorption-Enhanced Steam Methane Reforming Process Operated in Fluidized Bed Reactors: A Dynamic One-Dimensional Two-Fluid Model J. Solsvik, R.A. Sànchez, Z. Chao and H.A. Jakobsen Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway doi:10.4203/ccp.100.127 purchase the full-text of this paper Full Bibliographic Reference for this paper , "Simulation of the Sorption-Enhanced Steam Methane Reforming Process Operated in Fluidized Bed Reactors: A Dynamic One-Dimensional Two-Fluid Model", in B.H.V. Topping, (Editor), "Proceedings of the Eighth International Conference on Engineering Computational Technology", Civil-Comp Press, Stirlingshire, UK, Paper 127, 2012. doi:10.4203/ccp.100.127 Keywords: fluidized bed, two-fluid model, algorithm, sorption-enhanced steam methane reforming, multiphase reactive flow. Summary The aim of the study, described in this paper, is to derive a fluidized bed reactor model that improves 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 dynamic one-dimensional Eulerian-Eulerian two-fluid model is applied to investigate the reactive gas-solid flows of the sorption-enhanced steam methane reforming (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 is 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 the dynamic modelling of interconnected fluidised bed reactors. Moreover, the two- and three dimensional two-fluid models are as yet too computationally demanding as a result of 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 utilisation and recovery of the characteristic solid property, i.e. CO₂-capture and CO₂-release. The simulation results of the dynamic one-dimensional model are in fair agreement with the two-dimensional model considering the species concentration and temperature predictions of the SMR and SE-SMR processes. On the other hand, deviations between the one- and two-dimensional models are observed for the phase area fractions and the gas phase velocity. This deviation may be related to the gas bubble effect that is not included in the one-dimensional model. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £50 +P&P)
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