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Title: Evaluating the Performance of Micro-Encapsulated CO 2 Sorbents during CO 2 Absorption and Regeneration Cycling [CO2 Absorption and Regeneration Cycling with Micro-Encapsulated CO2 Sorbents (MECS)]

Abstract

We encapsulated six solvents with novel physical and chemical properties for CO 2 sorption within gas-permeable polymer shells, creating Micro-Encapsulated CO 2 Sorbents (MECS), to improve the CO 2 absorption kinetics and handling of the solvents for postcombustion CO 2 capture from flue gas. The solvents were sodium carbonate (Na2CO3) solution, uncatalyzed and with two different promoters, two ionic liquid (IL) solvents, and one CO 2-binding organic liquid (CO 2BOL). We subjected each of the six MECS to multiple CO 2 absorption and regeneration cycles and measured the working CO 2 absorption capacity as a function of time to identify promising candidate MECS for large-scale carbon capture. We discovered that the uncatalyzed Na 2CO 3 and Na 2CO 3-sarcosine MECS had lower CO 2 absorption rates relative to Na 2CO 3-cyclen MECS over 30 min of absorption, while the CO 2BOL Koechanol appeared to permeate through the capsule shell and is thus unsuitable. Here, we rigorously tested the most promising three MECS (Na 2CO 3-cyclen, IL NDIL0309, and IL NDIL0230) by subjecting each of them to a series of 10 absorption/stripping cycles. The CO 2 absorption curves were highly reproducible for these three MECS across 10 cycles, demonstrating successful absorption/regenerationmore » without degradation. As the CO 2 absorption rate is dynamic in time and the CO 2 loading per mass varies among the three most promising MECS, the process design parameters will ultimately dictate the selection of MECS solvent.« less

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [4];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Illinois, Chicago, IL (United States)
  3. Univ. of Pittsburgh, PA (United States)
  4. Univ. of Texas, Austin, TX (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1515329
Report Number(s):
LLNL-JRNL-746767
Journal ID: ISSN 0013-936X; 931464
Grant/Contract Number:  
AC52-07NA27344; FE0026465
Resource Type:
Accepted Manuscript
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 53; Journal Issue: 5; Journal ID: ISSN 0013-936X
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Knipe, Jennifer M., Chavez, Kathya P., Hornbostel, Katherine M., Worthington, Matthew A., Nguyen, Du T., Ye, Congwang, Bourcier, William L., Baker, Sarah E., Brennecke, Joan F., and Stolaroff, Joshuah K. Evaluating the Performance of Micro-Encapsulated CO 2 Sorbents during CO 2 Absorption and Regeneration Cycling [CO2 Absorption and Regeneration Cycling with Micro-Encapsulated CO2 Sorbents (MECS)]. United States: N. p., 2019. Web. doi:10.1021/acs.est.8b06442.
Knipe, Jennifer M., Chavez, Kathya P., Hornbostel, Katherine M., Worthington, Matthew A., Nguyen, Du T., Ye, Congwang, Bourcier, William L., Baker, Sarah E., Brennecke, Joan F., & Stolaroff, Joshuah K. Evaluating the Performance of Micro-Encapsulated CO 2 Sorbents during CO 2 Absorption and Regeneration Cycling [CO2 Absorption and Regeneration Cycling with Micro-Encapsulated CO2 Sorbents (MECS)]. United States. doi:10.1021/acs.est.8b06442.
Knipe, Jennifer M., Chavez, Kathya P., Hornbostel, Katherine M., Worthington, Matthew A., Nguyen, Du T., Ye, Congwang, Bourcier, William L., Baker, Sarah E., Brennecke, Joan F., and Stolaroff, Joshuah K. Wed . "Evaluating the Performance of Micro-Encapsulated CO 2 Sorbents during CO 2 Absorption and Regeneration Cycling [CO2 Absorption and Regeneration Cycling with Micro-Encapsulated CO2 Sorbents (MECS)]". United States. doi:10.1021/acs.est.8b06442.
@article{osti_1515329,
title = {Evaluating the Performance of Micro-Encapsulated CO 2 Sorbents during CO 2 Absorption and Regeneration Cycling [CO2 Absorption and Regeneration Cycling with Micro-Encapsulated CO2 Sorbents (MECS)]},
author = {Knipe, Jennifer M. and Chavez, Kathya P. and Hornbostel, Katherine M. and Worthington, Matthew A. and Nguyen, Du T. and Ye, Congwang and Bourcier, William L. and Baker, Sarah E. and Brennecke, Joan F. and Stolaroff, Joshuah K.},
abstractNote = {We encapsulated six solvents with novel physical and chemical properties for CO2 sorption within gas-permeable polymer shells, creating Micro-Encapsulated CO2 Sorbents (MECS), to improve the CO2 absorption kinetics and handling of the solvents for postcombustion CO2 capture from flue gas. The solvents were sodium carbonate (Na2CO3) solution, uncatalyzed and with two different promoters, two ionic liquid (IL) solvents, and one CO2-binding organic liquid (CO2BOL). We subjected each of the six MECS to multiple CO2 absorption and regeneration cycles and measured the working CO2 absorption capacity as a function of time to identify promising candidate MECS for large-scale carbon capture. We discovered that the uncatalyzed Na2CO3 and Na2CO3-sarcosine MECS had lower CO2 absorption rates relative to Na2CO3-cyclen MECS over 30 min of absorption, while the CO2BOL Koechanol appeared to permeate through the capsule shell and is thus unsuitable. Here, we rigorously tested the most promising three MECS (Na2CO3-cyclen, IL NDIL0309, and IL NDIL0230) by subjecting each of them to a series of 10 absorption/stripping cycles. The CO2 absorption curves were highly reproducible for these three MECS across 10 cycles, demonstrating successful absorption/regeneration without degradation. As the CO2 absorption rate is dynamic in time and the CO2 loading per mass varies among the three most promising MECS, the process design parameters will ultimately dictate the selection of MECS solvent.},
doi = {10.1021/acs.est.8b06442},
journal = {Environmental Science and Technology},
number = 5,
volume = 53,
place = {United States},
year = {2019},
month = {2}
}

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