Kinetic Equilibrium Study of CO2 Poisoning Observed in Anion Exchange Membranes When Exposed to Ambient Air and Varying Levels of CO2 ppm

Bryan Pivovar; Ashutosh Divekar; Andrew Herring

doi:10.1149/08613.0643ecst

Kinetic Equilibrium Study of CO2 Poisoning Observed in Anion Exchange Membranes When Exposed to Ambient Air and Varying Levels of CO2 ppm

Bryan Pivovar, Ashutosh Divekar, Andrew Herring

Chemistry and Nanoscience

Colorado School of Mines

Research output: Contribution to journal › Article › peer-review

9 Scopus Citations

Abstract

One of the hurdles in Anion exchange membrane fuel cell technology is weaker understanding of CO₂ poisoning observed when they are exposed to air. Our previous work suggests that OH" ions depletes in approximately 15 min to form CO32" and HCO3' ions when exposed to ambient air at 30 °C and 95%RH (1). However, an actual fuel cell device is operated at a much higher temperature. In this study we have reported the CO₂ absorption data at different temperatures and different CO₂ concentration environment. Our data suggest that the air equilibrated AEM concentration of CO32" increases at higher temperatures whereas HCO3" concentration follows a decreasing trend. The OH" ion has a very insignificant change at higher temperatures but we observe that the equilibrium OH" concentration is higher at lower ppm level of CO₂ environment. This indicates that the CO₂ reaction is dependent on CO₂ concentration in air.

Original language	American English
Pages (from-to)	643-648
Number of pages	6
Journal	ECS Transactions
Volume	86
Issue number	13
DOIs	https://doi.org/10.1149/08613.0643ecst https://doi.org/10.1149/08613.0643ecst
State	Published - 2018
Event	Symposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting - Cancun, Mexico Duration: 30 Sep 2018 → 4 Oct 2018

Bibliographical note

Publisher Copyright:
© 2018 by The Electrochemical Society. All rights reserved.

NREL Publication Number

NREL/JA-5900-73006

Keywords

anion exchange
CO2
fuel cells

Access to Document

Cite this

@article{8b231d6eda5745b18ec4da7c47ff0165,

title = "Kinetic Equilibrium Study of CO2 Poisoning Observed in Anion Exchange Membranes When Exposed to Ambient Air and Varying Levels of CO2 ppm",

abstract = "One of the hurdles in Anion exchange membrane fuel cell technology is weaker understanding of CO2 poisoning observed when they are exposed to air. Our previous work suggests that OH{"} ions depletes in approximately 15 min to form CO32{"} and HCO3' ions when exposed to ambient air at 30 °C and 95%RH (1). However, an actual fuel cell device is operated at a much higher temperature. In this study we have reported the CO2 absorption data at different temperatures and different CO2 concentration environment. Our data suggest that the air equilibrated AEM concentration of CO32{"} increases at higher temperatures whereas HCO3{"} concentration follows a decreasing trend. The OH{"} ion has a very insignificant change at higher temperatures but we observe that the equilibrium OH{"} concentration is higher at lower ppm level of CO2 environment. This indicates that the CO2 reaction is dependent on CO2 concentration in air.",

keywords = "anion exchange, CO2, fuel cells",

author = "Bryan Pivovar and Ashutosh Divekar and Andrew Herring",

note = "Publisher Copyright: {\textcopyright} 2018 by The Electrochemical Society. All rights reserved.; Symposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting ; Conference date: 30-09-2018 Through 04-10-2018",

year = "2018",

doi = "10.1149/08613.0643ecst",

language = "American English",

volume = "86",

pages = "643--648",

journal = "ECS Transactions",

issn = "1938-6737",

publisher = "Institute of Physics",

number = "13",

}

TY - JOUR

T1 - Kinetic Equilibrium Study of CO2 Poisoning Observed in Anion Exchange Membranes When Exposed to Ambient Air and Varying Levels of CO2 ppm

AU - Pivovar, Bryan

AU - Divekar, Ashutosh

AU - Herring, Andrew

PY - 2018

Y1 - 2018

N2 - One of the hurdles in Anion exchange membrane fuel cell technology is weaker understanding of CO2 poisoning observed when they are exposed to air. Our previous work suggests that OH" ions depletes in approximately 15 min to form CO32" and HCO3' ions when exposed to ambient air at 30 °C and 95%RH (1). However, an actual fuel cell device is operated at a much higher temperature. In this study we have reported the CO2 absorption data at different temperatures and different CO2 concentration environment. Our data suggest that the air equilibrated AEM concentration of CO32" increases at higher temperatures whereas HCO3" concentration follows a decreasing trend. The OH" ion has a very insignificant change at higher temperatures but we observe that the equilibrium OH" concentration is higher at lower ppm level of CO2 environment. This indicates that the CO2 reaction is dependent on CO2 concentration in air.

AB - One of the hurdles in Anion exchange membrane fuel cell technology is weaker understanding of CO2 poisoning observed when they are exposed to air. Our previous work suggests that OH" ions depletes in approximately 15 min to form CO32" and HCO3' ions when exposed to ambient air at 30 °C and 95%RH (1). However, an actual fuel cell device is operated at a much higher temperature. In this study we have reported the CO2 absorption data at different temperatures and different CO2 concentration environment. Our data suggest that the air equilibrated AEM concentration of CO32" increases at higher temperatures whereas HCO3" concentration follows a decreasing trend. The OH" ion has a very insignificant change at higher temperatures but we observe that the equilibrium OH" concentration is higher at lower ppm level of CO2 environment. This indicates that the CO2 reaction is dependent on CO2 concentration in air.

KW - anion exchange

KW - CO2

KW - fuel cells

UR - http://www.scopus.com/inward/record.url?scp=85058353352&partnerID=8YFLogxK

U2 - 10.1149/08613.0643ecst

DO - 10.1149/08613.0643ecst

M3 - Article

AN - SCOPUS:85058353352

SN - 1938-6737

VL - 86

SP - 643

EP - 648

JO - ECS Transactions

JF - ECS Transactions

IS - 13

T2 - Symposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting

Y2 - 30 September 2018 through 4 October 2018

ER -

Kinetic Equilibrium Study of CO2 Poisoning Observed in Anion Exchange Membranes When Exposed to Ambient Air and Varying Levels of CO2 ppm

Abstract

Bibliographical note

NREL Publication Number

Keywords

Access to Document

Other files and links

Fingerprint

Cite this