Degradation of the Ni-YSZ anodes of solid oxide fuel cells fed with CH 4 -H 2 O mixtures with low steam -to -carbon ratio
PBN-AR
Instytucja
Instytut Energetyki - Instytut Badawczy
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Biuletyn Polskiego Stowarzyszenia Wodoru i Ogniw Paliwowych (2pkt w roku publikacji)
ISSN
1896-7205
EISSN
Wydawca
Polskie Stowarzyszenie Wodoru i Ogniw Paliwowych, AGH w Krakowie, Wydział Energetyki iPaliw
DOI
Rok publikacji
2017
Numer zeszytu
Strony od-do
Numer tomu
11
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
angielski
solid oxide fuel cells
anode degradation
methane steam reforming
Streszczenia
Język
angielski
Treść
Solid oxide fuel cells are high temperature electrochemical energy conversion devices which operate at elevated temperature, typically in range from 600 C to 900 C. The elevated temperature allows to use internal reforming process of hydrocarbonaceous fuels, thus SOFCs can be directly fueled with gases containing hydrocarbons and their mixtures with different H/C ratio. SOFCs can operate in regimes where the amount of steam in the mixture is insufficient for suppression of the carbon formation and deposition. This can be due to the thermal cracking of hydrocarbons or the Boudouard decomposition of carbon monoxide. In the case of internal reforming, two chemical reactions are occurring on the anode, the deep-endothermic steam conversion and the exothermic electrochemical oxidation. Suchconditions potentially result in the accelerated degradation of the SOFC anode or in growing of local cracks in the fuel cell body. In this study an intermediate-term test (1000h) of AS-SOFC based on Ni-YSZ fueled with wet CH4 was performed, where the steam-to-carbon ratio (S/C) was gradually decreased. The structural damage and the degradationof the performance of the cell were observed and described.
Cechy publikacji
oryginalny artykuł naukowy
Inne
System-identifier
PX-5acc5e8ed5de05b4de28108a