Details
| Original language | English |
|---|---|
| Pages (from-to) | 602-612 |
| Number of pages | 11 |
| Journal | Electrochimica acta |
| Volume | 251 |
| Early online date | 30 Aug 2017 |
| Publication status | Published - 10 Oct 2017 |
Abstract
In this contribution a well-mixed electrochemical preferential oxidation (ECPrOx) reactor for hydrogen purification is considered and the influence of the CO concentration on the polarization curve, the conversion, the selectivity and the specific energy required is investigated. For that, a wide range of CO concentrations are studied and two different control modes are evaluated: voltage and current control. It was established that the oscillations, which arise during current control, enhance the reactor performance. They decrease the specific energy required and increase, as does the CO concentration, the selectivity and the conversion. Furthermore, it was found that the bifurcation current and potential vary nonlinearly with the CO concentration.
Keywords
- Bifurcation, Electrochemical CO removal, Membrane reactor, PEMFC, Potential oscillations
ASJC Scopus subject areas
- Chemical Engineering(all)
- General Chemical Engineering
- Chemistry(all)
- Electrochemistry
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In: Electrochimica acta, Vol. 251, 10.10.2017, p. 602-612.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of the autonomous oscillations and the CO concentration on the performance of an ECPrOx reactor
AU - Peña Arias, Ivonne Karina
AU - Sundmacher, Kai
AU - Hanke-Rauschenbach, Richard
N1 - Funding information: The authors gratefully acknowledge the financial support from the Deutsche Forschungsgemeinschaft (DFG), Grant No. HA 6841/1-1.
PY - 2017/10/10
Y1 - 2017/10/10
N2 - In this contribution a well-mixed electrochemical preferential oxidation (ECPrOx) reactor for hydrogen purification is considered and the influence of the CO concentration on the polarization curve, the conversion, the selectivity and the specific energy required is investigated. For that, a wide range of CO concentrations are studied and two different control modes are evaluated: voltage and current control. It was established that the oscillations, which arise during current control, enhance the reactor performance. They decrease the specific energy required and increase, as does the CO concentration, the selectivity and the conversion. Furthermore, it was found that the bifurcation current and potential vary nonlinearly with the CO concentration.
AB - In this contribution a well-mixed electrochemical preferential oxidation (ECPrOx) reactor for hydrogen purification is considered and the influence of the CO concentration on the polarization curve, the conversion, the selectivity and the specific energy required is investigated. For that, a wide range of CO concentrations are studied and two different control modes are evaluated: voltage and current control. It was established that the oscillations, which arise during current control, enhance the reactor performance. They decrease the specific energy required and increase, as does the CO concentration, the selectivity and the conversion. Furthermore, it was found that the bifurcation current and potential vary nonlinearly with the CO concentration.
KW - Bifurcation
KW - Electrochemical CO removal
KW - Membrane reactor
KW - PEMFC
KW - Potential oscillations
UR - http://www.scopus.com/inward/record.url?scp=85028727628&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2017.08.145
DO - 10.1016/j.electacta.2017.08.145
M3 - Article
AN - SCOPUS:85028727628
VL - 251
SP - 602
EP - 612
JO - Electrochimica acta
JF - Electrochimica acta
SN - 0013-4686
ER -