Abstract
Use of methanol as a fuel in SOFCs offers several advantages, such as having a lesser tendency for carbon deposition when vaporized and heated at high temperature. In this work, we conducted modeling and simulations of a methanol-fed SOFC system with anode offgas recycling. Anode offgas recycling provides water vapor in the fuel inlet, thus decreasing the tendency of the feed gas to form carbon deposits in the fuel cell stacks. The recycling also helps increase the fuel utilization. A thermodynamic analysis was conducted to calculate the energy generated, absorbed, or exchanged in the various blocks of the system, and the expected system energy output. Modeling and simulation results clearly showed that methanol has very little tendency to form carbon deposits during cracking in situ when used in a simple anode gas recycling system. A very good electrical efficiency is thus obtained.
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