Abstract
Magnetohydrodynamics (MHO) can improve the thermal efficiency and reduce levels of SOx and NO emissions of existing coal-fired power generation plants. Although the thermal and electrochemical environments for a coal-fired MHO channel challenge the materials used, platinum, tungsten, and tungsten-copper have been found to be suitable choices. Evaluations indicate these materials perform adequately as electrodes and other gas-side surfaces in the coal-fired MHO channel. Analysis of test elements has resulted in the identification of wear mechanisms. Testing of a prototypical coal-fired MHO channel incorporating these materials is under way and will be completed in 1993.
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