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Title: Packed and fluidized bed absorber modeling for carbon capture with micro-encapsulated sodium carbonate solution

Abstract

Micro-Encapsulated CO2 Sorbents (MECS) are a promising technology for post-combustion carbon capture because they enable slow-reacting solvents like carbonate solution to compete with traditional amine solvents. Before scaling up MECS for pilot testing, modeling is needed to design a MECS absorber and quantify its size and energy penalty. To that end, a multi-scale model for MECS- that ranges from a single capsule to a 500 MWe power plant absorber- is developed and presented here in this paper. First, the individual capsule model is developed and fitted to experimental CO2 absorption data collected on a 0.1 g sample of capsules filled with sodium carbonate solution. This capsule model is then validated against data collected on a 25 g batch of capsules exposed to flue gas conditions in a fluidized column. This model is then scaled up to represent two absorber designs: a multi-stage, counter-flow fluidized bed and a hollow, cylindrical packed bed with radial gas flow. These two absorber bed models are first optimized for a 1 MWe pilot-scale absorber, and then optimized for a 500 MWe coal plant. This model predicts absorbers of similar dimensions and smaller energy penalties than previously modeled absorbers filled with amine solvent capsules. Furthermore, itmore » is demonstrated here that a few reasonable improvements to capsule design would result in absorber sizes and energy penalties lower than those of a benchmark amine solvent tower. These results demonstrate that micro-encapsulated carbonate solution can compete with faster-acting amine solvents for post-combustion carbon capture.« less

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2]
+ Show Author Affiliations
  1. Univ. of Pittsburgh, PA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1601565
Alternate Identifier(s):
OSTI ID: 1636442
Report Number(s):
LLNL-JRNL-776802
Journal ID: ISSN 0306-2619; 968626
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Applied Energy
Additional Journal Information:
Journal Volume: 235; Journal Issue: C; Journal ID: ISSN 0306-2619
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 54 ENVIRONMENTAL SCIENCES; Post-combustion carbon capture; Micro-encapsulated CO2 sorbents; Sodium carbonate solvent; Packed and fluidized bed modeling; Carbon capture absorber modeling

Citation Formats

Hornbostel, K., Nguyen, D., Bourcier, W., Knipe, J., Worthington, M., McCoy, S., and Stolaroff, J. Packed and fluidized bed absorber modeling for carbon capture with micro-encapsulated sodium carbonate solution. United States: N. p., 2018. Web. doi:10.1016/j.apenergy.2018.11.027.
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Hornbostel, K., Nguyen, D., Bourcier, W., Knipe, J., Worthington, M., McCoy, S., & Stolaroff, J. Packed and fluidized bed absorber modeling for carbon capture with micro-encapsulated sodium carbonate solution. United States. https://doi.org/10.1016/j.apenergy.2018.11.027
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Hornbostel, K., Nguyen, D., Bourcier, W., Knipe, J., Worthington, M., McCoy, S., and Stolaroff, J. Tue . "Packed and fluidized bed absorber modeling for carbon capture with micro-encapsulated sodium carbonate solution". United States. https://doi.org/10.1016/j.apenergy.2018.11.027. https://www.osti.gov/servlets/purl/1601565.
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@article{osti_1601565,
title = {Packed and fluidized bed absorber modeling for carbon capture with micro-encapsulated sodium carbonate solution},
author = {Hornbostel, K. and Nguyen, D. and Bourcier, W. and Knipe, J. and Worthington, M. and McCoy, S. and Stolaroff, J.},
abstractNote = {Micro-Encapsulated CO2 Sorbents (MECS) are a promising technology for post-combustion carbon capture because they enable slow-reacting solvents like carbonate solution to compete with traditional amine solvents. Before scaling up MECS for pilot testing, modeling is needed to design a MECS absorber and quantify its size and energy penalty. To that end, a multi-scale model for MECS- that ranges from a single capsule to a 500 MWe power plant absorber- is developed and presented here in this paper. First, the individual capsule model is developed and fitted to experimental CO2 absorption data collected on a 0.1 g sample of capsules filled with sodium carbonate solution. This capsule model is then validated against data collected on a 25 g batch of capsules exposed to flue gas conditions in a fluidized column. This model is then scaled up to represent two absorber designs: a multi-stage, counter-flow fluidized bed and a hollow, cylindrical packed bed with radial gas flow. These two absorber bed models are first optimized for a 1 MWe pilot-scale absorber, and then optimized for a 500 MWe coal plant. This model predicts absorbers of similar dimensions and smaller energy penalties than previously modeled absorbers filled with amine solvent capsules. Furthermore, it is demonstrated here that a few reasonable improvements to capsule design would result in absorber sizes and energy penalties lower than those of a benchmark amine solvent tower. These results demonstrate that micro-encapsulated carbonate solution can compete with faster-acting amine solvents for post-combustion carbon capture.},
doi = {10.1016/j.apenergy.2018.11.027},
journal = {Applied Energy},
number = C,
volume = 235,
place = {United States},
year = {Tue Nov 20 00:00:00 EST 2018},
month = {Tue Nov 20 00:00:00 EST 2018}
}
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https://doi.org/10.1016/j.apenergy.2018.11.027
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    Works referencing / citing this record:

    Deformation and water loss from solvent filled microcapsules under compressive loads
    journal, January 2020

    • Finn, Justin R.; Galvin, Janine E.; Panday, Rupen
    • AIChE Journal, Vol. 66, Issue 5
    • DOI: 10.1002/aic.16905
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