Abstract
In order to verify the validity of the simulation and to investigate the gaseous diffusion from the outlet of the anode, anodic gas concentration measurements of a seal-less disk-type solid oxide fuel cell (SOFC) were carried out using quadrupole mass spectrometer (QMS). Simultaneous gas sampling was conducted from the five sampling ports made at the anode separator. The uniformity of the radial gas flow in the anode was confirmed by analyzing the gas from four sampling ports located at a concentric circle. H2, H2O and N2 concentration profiles were measured and simulated under various fuel utilization (Uf) conditions and changing the gas flow rate. The diffusion of N2 into the anode was found to become less with increasing Uf owing to the lesser diffusivity of N2 in H2O than in H2. From the simulation, the existence of the reverse current, i.e., electrolysis current, in the outlet region was predicted. It was confirmed that the existence of the electrolysis current is possible by measuring the concentration of the gas in the anode under electrolysis operations. The comparison of V-i characteristics measured and simulated revealed that the effect of the concentration polarization is not significant and suggested the validity of the assumption made for the simulation.
| Original language | English |
|---|---|
| Pages (from-to) | 169-177 |
| Number of pages | 9 |
| Journal | Journal of Power Sources |
| Volume | 145 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Aug 18 2005 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
Experimental investigation of anodic gaseous concentration of a practical seal-less solid oxide fuel cell. / Momma, Akihiko; Kaga, Yasuo; Takano, Kiyonami; Nozaki, Ken; Negishi, Akira; Kato, Ken; Kato, Tohru; Inagaki, Toru; Yoshida, Hiroyuki; Hoshino, Koji; Yamada, Masaharu; Akbay, Taner; Akikusa, Jun.
In: Journal of Power Sources, Vol. 145, No. 2, 18.08.2005, p. 169-177.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Experimental investigation of anodic gaseous concentration of a practical seal-less solid oxide fuel cell
AU - Momma, Akihiko
AU - Kaga, Yasuo
AU - Takano, Kiyonami
AU - Nozaki, Ken
AU - Negishi, Akira
AU - Kato, Ken
AU - Kato, Tohru
AU - Inagaki, Toru
AU - Yoshida, Hiroyuki
AU - Hoshino, Koji
AU - Yamada, Masaharu
AU - Akbay, Taner
AU - Akikusa, Jun
PY - 2005/8/18
Y1 - 2005/8/18
N2 - In order to verify the validity of the simulation and to investigate the gaseous diffusion from the outlet of the anode, anodic gas concentration measurements of a seal-less disk-type solid oxide fuel cell (SOFC) were carried out using quadrupole mass spectrometer (QMS). Simultaneous gas sampling was conducted from the five sampling ports made at the anode separator. The uniformity of the radial gas flow in the anode was confirmed by analyzing the gas from four sampling ports located at a concentric circle. H2, H2O and N2 concentration profiles were measured and simulated under various fuel utilization (Uf) conditions and changing the gas flow rate. The diffusion of N2 into the anode was found to become less with increasing Uf owing to the lesser diffusivity of N2 in H2O than in H2. From the simulation, the existence of the reverse current, i.e., electrolysis current, in the outlet region was predicted. It was confirmed that the existence of the electrolysis current is possible by measuring the concentration of the gas in the anode under electrolysis operations. The comparison of V-i characteristics measured and simulated revealed that the effect of the concentration polarization is not significant and suggested the validity of the assumption made for the simulation.
AB - In order to verify the validity of the simulation and to investigate the gaseous diffusion from the outlet of the anode, anodic gas concentration measurements of a seal-less disk-type solid oxide fuel cell (SOFC) were carried out using quadrupole mass spectrometer (QMS). Simultaneous gas sampling was conducted from the five sampling ports made at the anode separator. The uniformity of the radial gas flow in the anode was confirmed by analyzing the gas from four sampling ports located at a concentric circle. H2, H2O and N2 concentration profiles were measured and simulated under various fuel utilization (Uf) conditions and changing the gas flow rate. The diffusion of N2 into the anode was found to become less with increasing Uf owing to the lesser diffusivity of N2 in H2O than in H2. From the simulation, the existence of the reverse current, i.e., electrolysis current, in the outlet region was predicted. It was confirmed that the existence of the electrolysis current is possible by measuring the concentration of the gas in the anode under electrolysis operations. The comparison of V-i characteristics measured and simulated revealed that the effect of the concentration polarization is not significant and suggested the validity of the assumption made for the simulation.
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U2 - 10.1016/j.jpowsour.2004.12.062
DO - 10.1016/j.jpowsour.2004.12.062
M3 - Article
AN - SCOPUS:23844533433
VL - 145
SP - 169
EP - 177
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 2
ER -