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Reaction Mechanism of Carbon and Methane on the Anode of SOFC

Yin, Wenbin
http://rave.ohiolink.edu/etdc/view?acc_num=akron1398778152

Abstract Details

2014, Master of Science, University of Akron, Polymer Science.
The study was focused on modification of the structure and composition of the solid oxide fuel cell (SOFC) anode and also investigation of the anode reaction mechanism. Fuel cells with different anode interlayer thickness were fabricated. Consider all factors such as mechanical strength, active sites (TPB length), transportation limitation and activation polarization into fabrication of optimum anode interlayer. Fuel cells with 15um anode interlayer showed the best electrochemical performance and lowest resistance at all different temperatures from 750C to 850C in H2 and CH4 gas fuels. Pd@CeO2 nanoparticle has high catalytic active, high ion and electron conductive properties which can be applied for SOFC. 15-20 nm Pd@CeO2 core-shell nanoparticles were synthesized via chemical co-precipitation method. SOFC anode was modified by impregnating Pd@CeO2 core-shell nanoparticle solution. Electrochemical measurement of regular and modified fuel cells showed lower resistance and higher maximum current density for modified fuel cells compared to the regular ones. The reaction mechanism on the anode of SOFC was studied by coconut carbon as fuel source injected into SOFC anode under different gas streams. Addition of 3 mol% H2 and 7 mol% H2O resulted in generation of CO, CO2 and CH4 which could increase the current and power density of the fuel cell. In this thesis, SOFC transient study was also investigated by switching between the gas fuels under a constant load to study the electrochemical reaction pathway. Switching the gas feed from CH4/Ar to Ar allowed the deposited carbon, which was formed from CH4 cracking, to act as a fuel resulting in production of CO and electricity. Addition of CO2 to the CH4 fuel decreased the carbon deposition through the interaction of CO2 with deposited C generating CO.
Steven S.C. Chuang, Dr. (Advisor)
Mesfin Tsige, Dr. (Committee Member)
94 p.
Chemical Engineering

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Citations

  • Yin, W. (2014). Reaction Mechanism of Carbon and Methane on the Anode of SOFC [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398778152

    APA Style (7th edition)

  • Yin, Wenbin. Reaction Mechanism of Carbon and Methane on the Anode of SOFC . 2014. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1398778152.

    MLA Style (8th edition)

  • Yin, Wenbin. "Reaction Mechanism of Carbon and Methane on the Anode of SOFC ." Master's thesis, University of Akron, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398778152

    Chicago Manual of Style (17th edition)

akron1398778152
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© 2014, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.