Details
| Original language | English |
|---|---|
| Article number | 034501 |
| Number of pages | 16 |
| Journal | ECS Advances |
| Volume | 2 |
| Issue number | 3 |
| Publication status | Published - 9 Aug 2023 |
Abstract
In this contribution a spatially distributed Electrochemical Preferential Oxidation (ECPrOx) reactor is evaluated and the influence of the temperature, CO inlet concentration, feed flow rate and relative humidity on the polarization curve, the local current distribution and the CO outlet concentration, selectivity and conversion are investigated. For that, six different cases are studied under galvanostatic and potentiostatic operation. For Galvanostatic operation, it was observed that depending on the operation conditions, the bifurcation point as well as the frequency and amplitude of the oscillations can be modified. Additionally, several spatiotemporal profiles of the local current density were found. For potentiostatic operation, the spatiotemporal profiles are constant with time, however they are affected by the anode overvoltage. Finally, after the bifurcation point, the temporal averaged anode overvoltage and the CO outlet concentration is always lower for galvanostatic control.
Keywords
- electrochemical CO removal, PEMFC, potential oscillations, spatially distributed Cell
ASJC Scopus subject areas
- Chemistry(all)
- Electrochemistry
- Energy(all)
- Energy (miscellaneous)
- Materials Science(all)
- Materials Science (miscellaneous)
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In: ECS Advances, Vol. 2, No. 3, 034501, 09.08.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Electrochemical Performance of a Spatially Distributed ECPrOx Reactor
AU - Peña Arias, Ivonne Karina
AU - Hanke-Rauschenbach, Richard
AU - Sundmacher, Kai
N1 - Publisher Copyright: © 2023 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited
PY - 2023/8/9
Y1 - 2023/8/9
N2 - In this contribution a spatially distributed Electrochemical Preferential Oxidation (ECPrOx) reactor is evaluated and the influence of the temperature, CO inlet concentration, feed flow rate and relative humidity on the polarization curve, the local current distribution and the CO outlet concentration, selectivity and conversion are investigated. For that, six different cases are studied under galvanostatic and potentiostatic operation. For Galvanostatic operation, it was observed that depending on the operation conditions, the bifurcation point as well as the frequency and amplitude of the oscillations can be modified. Additionally, several spatiotemporal profiles of the local current density were found. For potentiostatic operation, the spatiotemporal profiles are constant with time, however they are affected by the anode overvoltage. Finally, after the bifurcation point, the temporal averaged anode overvoltage and the CO outlet concentration is always lower for galvanostatic control.
AB - In this contribution a spatially distributed Electrochemical Preferential Oxidation (ECPrOx) reactor is evaluated and the influence of the temperature, CO inlet concentration, feed flow rate and relative humidity on the polarization curve, the local current distribution and the CO outlet concentration, selectivity and conversion are investigated. For that, six different cases are studied under galvanostatic and potentiostatic operation. For Galvanostatic operation, it was observed that depending on the operation conditions, the bifurcation point as well as the frequency and amplitude of the oscillations can be modified. Additionally, several spatiotemporal profiles of the local current density were found. For potentiostatic operation, the spatiotemporal profiles are constant with time, however they are affected by the anode overvoltage. Finally, after the bifurcation point, the temporal averaged anode overvoltage and the CO outlet concentration is always lower for galvanostatic control.
KW - electrochemical CO removal
KW - PEMFC
KW - potential oscillations
KW - spatially distributed Cell
UR - http://www.scopus.com/inward/record.url?scp=85200474453&partnerID=8YFLogxK
U2 - 10.1149/2754-2734/acec00
DO - 10.1149/2754-2734/acec00
M3 - Article
AN - SCOPUS:85200474453
VL - 2
JO - ECS Advances
JF - ECS Advances
SN - 2754-2734
IS - 3
M1 - 034501
ER -