Effects of the gas velocity on formation of the carbon deposits on fuel electrode of AS-SOFC
PBN-AR
Instytucja
Instytut Energetyki - Instytut Badawczy
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
ECS Meeting Abstracts
ISSN
EISSN
2151-2043
Wydawca
The Electrochemical Society
DOI
Rok publikacji
2017
Numer zeszytu
Strony od-do
Numer tomu
Identyfikator DOI
Liczba arkuszy
Streszczenia
Język
angielski
Treść
The elevated operating temperature of solid oxide fuel cell (SOFC) makes it possible to internally reform the incoming hydrocarbonaceous fuel directly on surface of the anode in presence of catalytic material such as nickel cermet. Thus, except hydrogen and carbon monoxide, SOFCs can be fuelled with various organic compounds in gaseous state like methane, petroleum gases, light alcohols, and others. The presence of carbon-based compounds in the fuel might result in the formation and deposition of soot (or coke) on the surface of SOFC anode. The operation of solid oxide fuel cells with a solid carbon layer on the anode surface might lead to several undesirable effects, such as the partial or complete loss of the electrochemical activity. It is commonly known that the process of carbon deposition in the anodic compartment of SOFC depends on the thermodynamic and kinetic conditions. The growth of the deposit is driven by factors such as the steam-to-carbon ratio (S/C), temperature, catalytic properties of the material of the anode, and the current density of the cell. Carbon deposition is intensified by the increase of S/C ratio or by the rise of current density. The higher the temperature, the longer period of time is also required for the solid carbon particles to deposit on the porous surface. The rate of soot formation may be strongly augmented by the presence of nickel. Nickel serves as an excellent catalyst for the carbon deposition process, such as methane cracking (Eq. (1)), reduction of carbon monoxide (Eq. (2)) and disproportionation of carbon monoxide, also known as Boudouard reaction (Eq. (3)).
Cechy publikacji
oryginalny artykuł naukowy
Inne
System-identifier
PX-5acb52f7d5de830a15d3b07d