Insights into the Adsorption of Carbon Dioxide in the Presence of Water Vapor Utilizing a Low Molecular Weight Polyethylenimine-Impregnated CARiACT Silica Sorbent

Monazam, Esmail R.; Breault, Ronald W.; Fauth, Daniel J.; Shadle, Lawrence J.; Bayham, Samuel

doi:10.1021/acs.iecr.7b01271

Title: Insights into the Adsorption of Carbon Dioxide in the Presence of Water Vapor Utilizing a Low Molecular Weight Polyethylenimine-Impregnated CARiACT Silica Sorbent

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Abstract

Thermogravimetric analysis was employed to investigate the CO₂ and H₂O adsorption rates and water vapor equilibrium on anhydrous and pre-hydrate linear polyethylenimine (LPEI) sorbent impregnated within a commercially functional CARiACT G10 (HPV) silica support. Water vapor experiments utilizing specific humidity of 2%, 8%, and 16% in contact with an anhydrous PEI sorbent resulted in proportional quantities of water vapor uptake. Subsequently, both anhydrous and pre-hydrated PEI-impregnated sorbents were made available to identical humidified gaseous streams containing a CO₂ concentration of 10% at 60oC. CO₂ capacity increased dramatically in the presence of different levels of humidity. Various kinetic models were systematically employed to interpret the experimental data including single and multiple-step models. The rate data was best represented by a reaction mechanism pathway involving the interplay of CO₂ with PEI-impregnated sorbents exhibited a quick adsorption phase followed by a slow approach to equilibrium. Moreover, a phenomenological rate model was developed to describe the dynamic H₂O and CO₂ uptakes at specific humidity levels studied. The kinetic study showed good agreement with experimental data. Furthermore, the effects observed during the adsorption and hydration are shown to be complementary to known chemical and physical transformations within the polyethylenimine’s macromolecule.

Authors:

Monazam, Esmail R. ^[1];

^[2]; Fauth, Daniel J. ^[2]; Shadle, Lawrence J. ^[2]; Bayham, Samuel ^[2]

REM Engineering Services, Morgantown, WV (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)

Publication Date:: Thu Jul 20 00:00:00 EDT 2017

Research Org.:: National Energy Technology Lab. (NETL), Morgantown, WV (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1431304

Report Number(s):: NETL-PUB-21089
Journal ID: ISSN 0888-5885

Resource Type:: Accepted Manuscript

Journal Name:: Industrial and Engineering Chemistry Research

Additional Journal Information:: Journal Volume: 56; Journal Issue: 32; Journal ID: ISSN 0888-5885

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 20 FOSSIL-FUELED POWER PLANTS; CO2 capture

Citation Formats


                    Monazam, Esmail R., Breault, Ronald W., Fauth, Daniel J., Shadle, Lawrence J., and Bayham, Samuel. Insights into the Adsorption of Carbon Dioxide in the Presence of Water Vapor Utilizing a Low Molecular Weight Polyethylenimine-Impregnated CARiACT Silica Sorbent.  United States: N. p., 2017. 
Web.  doi:10.1021/acs.iecr.7b01271.

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                    Monazam, Esmail R., Breault, Ronald W., Fauth, Daniel J., Shadle, Lawrence J., & Bayham, Samuel. Insights into the Adsorption of Carbon Dioxide in the Presence of Water Vapor Utilizing a Low Molecular Weight Polyethylenimine-Impregnated CARiACT Silica Sorbent.  United States.  https://doi.org/10.1021/acs.iecr.7b01271

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                    Monazam, Esmail R., Breault, Ronald W., Fauth, Daniel J., Shadle, Lawrence J., and Bayham, Samuel. Thu .  
"Insights into the Adsorption of Carbon Dioxide in the Presence of Water Vapor Utilizing a Low Molecular Weight Polyethylenimine-Impregnated CARiACT Silica Sorbent".  United States.  https://doi.org/10.1021/acs.iecr.7b01271.  https://www.osti.gov/servlets/purl/1431304.

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@article{osti_1431304,

  title        = {Insights into the Adsorption of Carbon Dioxide in the Presence of Water Vapor Utilizing a Low Molecular Weight Polyethylenimine-Impregnated CARiACT Silica Sorbent},

  author       = {Monazam, Esmail R. and Breault, Ronald W. and Fauth, Daniel J. and Shadle, Lawrence J. and Bayham, Samuel},

  abstractNote = {Thermogravimetric analysis was employed to investigate the CO2 and H2O adsorption rates and water vapor equilibrium on anhydrous and pre-hydrate linear polyethylenimine (LPEI) sorbent impregnated within a commercially functional CARiACT G10 (HPV) silica support. Water vapor experiments utilizing specific humidity of 2%, 8%, and 16% in contact with an anhydrous PEI sorbent resulted in proportional quantities of water vapor uptake. Subsequently, both anhydrous and pre-hydrated PEI-impregnated sorbents were made available to identical humidified gaseous streams containing a CO2 concentration of 10% at 60oC. CO2 capacity increased dramatically in the presence of different levels of humidity. Various kinetic models were systematically employed to interpret the experimental data including single and multiple-step models. The rate data was best represented by a reaction mechanism pathway involving the interplay of CO2 with PEI-impregnated sorbents exhibited a quick adsorption phase followed by a slow approach to equilibrium. Moreover, a phenomenological rate model was developed to describe the dynamic H2O and CO2 uptakes at specific humidity levels studied. The kinetic study showed good agreement with experimental data. Furthermore, the effects observed during the adsorption and hydration are shown to be complementary to known chemical and physical transformations within the polyethylenimine’s macromolecule.},

  doi          = {10.1021/acs.iecr.7b01271},

  journal      = {Industrial and Engineering Chemistry Research},

  number       = 32,

  volume       = 56,

  place        = {United States},

  year         = {Thu Jul 20 00:00:00 EDT 2017},

  month        = {Thu Jul 20 00:00:00 EDT 2017}

}

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