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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | David, A. Berry Shekhawat, Dushyant Todd, H. Gardner Salazar, Maria Daniel, J. Haynes James, J. Spivey |
| Copyright Year | 2006 |
| Abstract | Catalytic partial oxidation (CPOX) of liquid fuels is an attractive option for producing a hydrogen-rich gas stream for fuel cell applications. However, the high sulfur content along with aromatic compounds present in liquid fuels may deactivate reforming catalysts. Deactivation of these catalysts by carbon deposition and sulfur poisoning is a key technical challenge. The relationship between catalyst supports and deactivation have been studied here for three catalysts (Rh/Ce0.5Zr0.5O2, Pt/Ce0.5Zr0.5O2, and Pt/Al2O3) in a fixed bed catalytic reactor using a mixture of n-tetradecane, 1-methylnaphthalene, and dibenzothiophene to simulate logistic fuels. Carbon production during CPOX reforming was directly related to olefin formation. Olefins, which are known coke precursors, were observed on the Pt catalysts during CPOX of n-tetradecane with no sulfur (particularly from Pt/Al2O3), but not on Rh/Ce0.5Zr0.5O2. For the Rh/Ce0.5Zr0.5O2, yields of H2 and CO dropped to a stationary level after the introduction of sulfur-containing feed (1000 ppm sulfur) or aromatic-containing feed (5 wt%), however, the catalyst activity was restored after removing the sulfur or aromatics from the feed. For the Pt catalysts, H2 and CO yields dropped continuously over time in the presence of sulfur or aromatics in feed. The superior performance of Rh/Ce0.5Zr0.5O2 can be attributed to the higher oxygen-ion conductivity of the Ce0.5Zr0.5O2 support as well as the activity of the Rh sites. |
| Sponsorship | Nanotechnology Institute |
| Starting Page | 449 |
| Ending Page | 452 |
| Page Count | 4 |
| File Format | |
| ISBN | 0791842479 |
| DOI | 10.1115/FUELCELL2006-97265 |
| e-ISBN | 0791837807 |
| Volume Number | ASME 2006 Fourth International Conference on Fuel Cell Science, Engineering and Technology, Parts A and B |
| Conference Proceedings | ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology |
| Language | English |
| Publisher Date | 2006-06-19 |
| Publisher Place | Irvine, California, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Oxygen-ion conductivity Carbon formation Fuel reforming Logistic fuels Sulfur resistance Oxygen Electrical conductivity Catalysts Hydrogen Coke Platinum catalysts Fuels Carbon Zirconium Thermal conductivity Oxidation Fuel cell applications Sulfur |
| Content Type | Text |
| Resource Type | Article |
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