Effects of heat exchanger tubes on hydrodynamics and CO2 capture of a sorbent-based fluidized bed reactor

Lai, Canhai; Xu, Zhijie; Li, Tingwen; Lee, Andrew; Dietiker, Jean-Francois; Lane, William; Sun, Xin

doi:10.1016/j.powtec.2017.07.062

Title: Effects of heat exchanger tubes on hydrodynamics and CO₂ capture of a sorbent-based fluidized bed reactor

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Abstract

In virtual design and scale up of pilot-scale carbon capture systems, the coupled reactive multiphase flow problem must be solved to predict the adsorber's performance and capture efficiency under various operation conditions. This paper focuses on the detailed computational fluid dynamics (CFD) modeling of a pilot-scale fluidized bed adsorber equipped with vertical cooling tubes. Multiphase Flow with Interphase eXchanges (MFiX), an open-source multiphase flow CFD solver, is used for the simulations with custom code to simulate the chemical reactions and filtered sub-grid models to capture the effect of the unresolved details in the coarser mesh for simulations with reasonable accuracy and manageable computational effort. Previously developed filtered models for horizontal cylinder drag, heat transfer, and reaction kinetics have been modified to derive the 2D filtered models representing vertical cylinders in the coarse-grid CFD simulations. The effects of the heat exchanger configurations (i.e., horizontal or vertical tubes) on the adsorber's hydrodynamics and CO₂ capture performance are then examined. A one-dimensional three-region process model is briefly introduced for comparison purpose. The CFD model matches reasonably well with the process model while provides additional information about the flow field that is not available with the process model.

Authors:

Lai, Canhai ^[1]; Xu, Zhijie ^[2]; Li, Tingwen ^[3]; Lee, Andrew ^[3]; Dietiker, Jean-Francois ^[3]; Lane, William ^[4]; Sun, Xin ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Boston Univ., MA (United States)

Publication Date:: Sat Aug 05 00:00:00 EDT 2017

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1435292

Alternate Identifier(s):: OSTI ID: 1549714

Grant/Contract Number:: AC05-00OR22725; AC05-76RL01830

Resource Type:: Accepted Manuscript

Journal Name:: Powder Technology

Additional Journal Information:: Journal Volume: 322; Journal Issue: C; Journal ID: ISSN 0032-5910

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats


                    Lai, Canhai, Xu, Zhijie, Li, Tingwen, Lee, Andrew, Dietiker, Jean-Francois, Lane, William, and Sun, Xin. Effects of heat exchanger tubes on hydrodynamics and CO2 capture of a sorbent-based fluidized bed reactor.  United States: N. p., 2017. 
Web.  doi:10.1016/j.powtec.2017.07.062.

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                    Lai, Canhai, Xu, Zhijie, Li, Tingwen, Lee, Andrew, Dietiker, Jean-Francois, Lane, William, & Sun, Xin. Effects of heat exchanger tubes on hydrodynamics and CO2 capture of a sorbent-based fluidized bed reactor.  United States.  https://doi.org/10.1016/j.powtec.2017.07.062

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                    Lai, Canhai, Xu, Zhijie, Li, Tingwen, Lee, Andrew, Dietiker, Jean-Francois, Lane, William, and Sun, Xin. Sat .  
"Effects of heat exchanger tubes on hydrodynamics and CO2 capture of a sorbent-based fluidized bed reactor".  United States.  https://doi.org/10.1016/j.powtec.2017.07.062.  https://www.osti.gov/servlets/purl/1435292.

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@article{osti_1435292,

  title        = {Effects of heat exchanger tubes on hydrodynamics and CO2 capture of a sorbent-based fluidized bed reactor},

  author       = {Lai, Canhai and Xu, Zhijie and Li, Tingwen and Lee, Andrew and Dietiker, Jean-Francois and Lane, William and Sun, Xin},

  abstractNote = {In virtual design and scale up of pilot-scale carbon capture systems, the coupled reactive multiphase flow problem must be solved to predict the adsorber's performance and capture efficiency under various operation conditions. This paper focuses on the detailed computational fluid dynamics (CFD) modeling of a pilot-scale fluidized bed adsorber equipped with vertical cooling tubes. Multiphase Flow with Interphase eXchanges (MFiX), an open-source multiphase flow CFD solver, is used for the simulations with custom code to simulate the chemical reactions and filtered sub-grid models to capture the effect of the unresolved details in the coarser mesh for simulations with reasonable accuracy and manageable computational effort. Previously developed filtered models for horizontal cylinder drag, heat transfer, and reaction kinetics have been modified to derive the 2D filtered models representing vertical cylinders in the coarse-grid CFD simulations. The effects of the heat exchanger configurations (i.e., horizontal or vertical tubes) on the adsorber's hydrodynamics and CO2 capture performance are then examined. A one-dimensional three-region process model is briefly introduced for comparison purpose. The CFD model matches reasonably well with the process model while provides additional information about the flow field that is not available with the process model.},

  doi          = {10.1016/j.powtec.2017.07.062},

  journal      = {Powder Technology},

  number       = C,

  volume       = 322,

  place        = {United States},

  year         = {Sat Aug 05 00:00:00 EDT 2017},

  month        = {Sat Aug 05 00:00:00 EDT 2017}

}

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Title: Effects of heat exchanger tubes on hydrodynamics and CO2 capture of a sorbent-based fluidized bed reactor

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Title: Effects of heat exchanger tubes on hydrodynamics and CO₂ capture of a sorbent-based fluidized bed reactor