Analysis of the regenerative H2S poisoning mechanism in Ce0.8Sm0.2O2-coated Ni/YSZ anodes for intermediate temperature solid oxide fuel cells
- Analysis of the regenerative H2S poisoning mechanism in Ce0.8Sm0.2O2-coated Ni/YSZ anodes for intermediate temperature solid oxide fuel cells
- 윤정우; 윤성필; 박상균; 김희수; 남석우
- ITSOFC; H2S; Sulfur poisoning; ceria; samarium-doped oxide; Intermediate temperature solid; oxide fuel cell; Hydrogen sulfide; Samarium-doped ceria
- Issue Date
- International journal of hydrogen energy
- VOL 36, NO 1, 787-796
- Ceria is used as a sulfur sorbent due to its high affinity for sulfide at high temperatures. In
addition, the ionic conductivity of ceria can be dramatically increased by doping with rare
metals, including lanthanum, samarium, and gadolinium. Therefore, to enhance sulfur
tolerance and improve anode performance, we modified an Ni-based anode with a thin
layer coating of Sm0.2Ce0.8O2-δ (SDC) on the pore wall surface of an Ni/YSZ anode. The
anode-supported cells were tested with varying H2S concentrations (0-100 ppm) at 600 and
700 ℃. The cell performance was improved in the ceria- (by 20%) and in the SDC- (by 50%)
modified anode by extending the additional TPB area in the anode. Under varying H2S
exposure, the polarization resistance was reduced by ceria and the SDC coating on the
anode pore wall surface, which led to improved cell performance. A porous SDC layer on
the Ni/YSZ anode pore wall acted as a sulfur sorbent as well as an additional TPB area.
Otherwise, ceria mainly acted as a sulfur sorbent at high concentrations of H2S (>60 ppm).
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.