|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High-Temperature Systems for Energy Conversion and Storage
||Carbon Deposition Behavior on Chromium Oxides Heated Directly in Low S/C Environments
||Takuya Ito, Shinji Amaha, Mitsutoshi Ueda
|On-Site Speaker (Planned)
Suppression of carbon deposition is one of the main challenges to achieve highly efficient operation of solid oxide fuel cell (SOFC) systems in low steam/carbon (S/C) environments. Ferritic Cr2O3- forming alloys are the materials of choice for interconnects of SOFCs and supply lines of fuel in SOFC systems. Carbon deposition may occur on the alloys, when humidified methane whose S/C ratio of less than 1 is supplied. This study focuses on carbon deposition on both chromium oxides formed on the alloy and the oxides of single crystal, in order to clarify the mechanism of carbon deposition. Samples of the Cr2O3- forming alloy and the single crystal of Cr2O3 were directly heated to 1173 K in low S/C environment (S/C=0.02). Carbon was deposited on the Cr2O3 scale containing (Mn, Cr)3O4 spinel but not on the single crystal. The difference of the carbon deposition behavior will be discussed based on thermodynamic calculation.
||Planned: A print-only volume