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Effect of Hydrogen Sulfide in Landfill Gas on Anode Poisoning of Solid Oxide Fuel Cells
Khan, Feroze

2012, Master of Science in Chemistry, Youngstown State University, Department of Chemistry.
The world is facing an energy crisis and there is an immediate need to find a sustainable source of energy. Landfill gas has the potential to be a valuable source since methane is a major constituent. Currently the majority of the landfills either burn away their gas in flares or combust it in mechanical engines to produce electricity. The issue with mechanical engines is that incomplete combustion of gases can lead to pollution of atmosphere and are also highly inefficient. In this research we are studying the effects of landfill gas on SOFC performance. The tests were performed on a button cell and the electrochemical cell used for our voltammetric experiments was called the ProboStatTM. Several different types of anodes were studied to understand the working of the SOFCs, but Ni-YSZ was the main focus. The cathode used was LSM (lanthanum strontium manganite).The anode was supplied with landfill gas and the cathode with air. Landfill gas contains impurities such as organic and inorganic sulfur, halogenated organics and siloxanes. These impurities can cause anode poisoning by passivating the cell. How the presence of hydrogen sulfide affects the working of the cell was studied. Also, the effect of water vapor was studied. SEM and XRD were used to analyze the electrodes. RAE Systems Colorimetric gas detection tubes and gas chromatography coupled with various detection methods were used to analyze landfill gas. Based on the study it can be concluded that landfill gas has to be treated to reduce the sulfide content from 100's of ppm to single digits or less in order to sustain SOFC operation at 750 °C. Alternatively, a background of hydrogen in the pre-treated landfill gas was shown to offer some means of protection against sulfide passivation.
Clovis Linkous, PhD (Advisor)
Timothy Wagner, PhD (Committee Member)
Ruigang Wang, PhD (Committee Member)
77 p.

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Khan, F. (2012). Effect of Hydrogen Sulfide in Landfill Gas on Anode Poisoning of Solid Oxide Fuel Cells. (Electronic Thesis or Dissertation). Retrieved from https://etd.ohiolink.edu/

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Khan, Feroze. "Effect of Hydrogen Sulfide in Landfill Gas on Anode Poisoning of Solid Oxide Fuel Cells." Electronic Thesis or Dissertation. Youngstown State University, 2012. OhioLINK Electronic Theses and Dissertations Center. 23 Oct 2018.

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Khan, Feroze "Effect of Hydrogen Sulfide in Landfill Gas on Anode Poisoning of Solid Oxide Fuel Cells." Electronic Thesis or Dissertation. Youngstown State University, 2012. https://etd.ohiolink.edu/

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