Development of anodes for direct oxidation of methane fuel in solid oxide fuel cells

2016-06-22
Akdeniz, Yelda
Timurkutluk, Bora
Timurkutluk, Cigdem
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
161
views
0
downloads
In addition to pure hydrogen, solid oxide fuel cells (SOFCs) can utilize hydrocarbons as a fuel. However, conventional Ni-based anodes exhibit an excellent catalytic activity towards the hydrocarbon cracking reaction and thus the carbon deposition occurs in the anode. The deposited carbons quickly deactivate the anode irreversibly by covering the active surface of the anode catalyst. As a result, a significant degradation in the cell performance can be seen. In this study, the anode structure is modified by the addition of copper (Cu) and ceria (CeO2) to increase the coking resistance of the cell under direct methane fuel. In this respect, the anodes are infiltrated by different amounts of Cu and CeO2 nitrates via the wet impregnation technique to investigate the effects of Cu and CeO2 loadings on the carbon tolerance of the cell. The effects of the anode porosity and composition are also considered in the study. The carbon resistance thus the service life of the cell with Cu/CeO2/Ni/YSZ anodes is found to be significantly higher than that of conventional Ni-based anodes under direct dry methane fuel. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Solid oxide fuel cell, Direct methane fuel, Carbon deposition, Infiltration, Copper, Ceria
https://hdl.handle.net/11511/66481
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Unclassified, Article

Suggestions

Combinatorial development of LSC-113/LSC-214 cathode materials for intermediate temperature solid oxide fuel cells
Sarı, Doğancan; Öztürk, Tayfur; Kalay, Yunus Eren; Department of Metallurgical and Materials Engineering (2017)
Solid oxide fuel cells are environmentally friendly, efficient and fuel versatile energy conversion devices which suffer from high operating temperatures. For lowering the operating temperatures of solid oxide fuel cells (SOFC), LSC-113/LSC-214 composite cathodes have recently attracted much attention due to their enhanced kinetics. However, the full potential of this novel system is still unknown. In this study, a combinatorial approach was used to develop cathode materials which would reduce operating tem...
Development of 100w portable fuel cell system working with sodium borohydride
Erkan, Serdar; Eroğlu, İnci; Department of Chemical Engineering (2011)
Fuel cells are electricity generators which convert chemical energy of hydrogen directly to electricity by means of electrochemical oxidation and reduction reactions. A single proton exchange membrane (PEM) fuel cell can only generate electricity with a potential between 0.5V and 1V. The useful potential can be achieved by stacking cells in series to form a PEM fuel cell stack. There is a potential to utilize 100W class fuel cells. Fuelling is the major problem of the portable fuel cells. The aim of this th...
Modeling of a high temperature PEM fuel cell
Sezgin, Berna; Eroğlu, İnci; Devrim, Yılser; Department of Chemical Engineering (2016)
High temperature polymer electrolyte membrane fuel cells (HT-PEMFC) are considered as the next generation of fuel cells since high temperature operation for PEM fuel cells has several advantages such as single phase operation, high carbon monoxide tolerance, low or zero carbon emission and removal of some equipment from the system. In order to obtain high performances, HT-PEMFC systems should be optimized in terms of dimensions, materials, operating conditions and other parameters. Modeling can help to pre-...
MODELING OF BIPOLAR PLATES FOR PROTON EXCHANGE MEMBRANE FUEL CELLS
Ekiz, Ahmet; Camci, Talha; Turkmen, Ibrahim; SANKIR, MEHMET; USLU, SITKI; Baker, Derek Keıth; Agar, Ertan (2011-09-01)
Fuel cell technology is one of the most economic and efficient ways to utilize hydrogen energy. Various types of fuel cells are present regarding the fuel type and amount of power produced. Among these, proton exchange membrane fuel cells (PEMFCs) are very promising. In this work, a 2D proton exchange membrane fuel cell unit cell was modeled using Comsol Multiphysics software. Cell section was taken parallel to flow direction. Obstacles with various geometries were placed in the flow channel in order to for...
Novel structured electrolytes for solid oxide fuel cells
TİMURKUTLUK, BORA; Celik, Selahattin; Timurkutluk, Cigdem; Mat, Mahmut D.; Kaplan, Yuksel (2012-09-01)
Novel grate type electrolytes are designed and fabricated to improve the cell performance and to lower the operation temperature of intermediate temperature electrolyte supported solid oxide fuel cells based on scandium and ceria stabilized zirconia by partly reducing the electrolyte thickness. The characteristics of three different small size cells (11.62 cm(2) active area) having various electrolyte designs are investigated. A standard electrolyte supported cell is also produced as a base case for compari...
Citation Formats
Y. Akdeniz, B. Timurkutluk, and C. Timurkutluk, “Development of anodes for direct oxidation of methane fuel in solid oxide fuel cells,” INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, pp. 10021–10029, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66481.
METU IIS - Integrated Information Service open@metu.edu.tr