Westinghouse is developing hot gas cleaning systems for advanced, coal-based gas turbine cycles. This paper summarizes the Westinghouse hot gas filter concept and reports on recent in-house and field test programs supporting its design and development. Basic materials issues related to ceramic material stability and hot metals structures are reviewed. Results of recent filter system testing are presented, comparing candle and crossflow designs operating in both “simulated” and actual coal-derived gas streams. Laboratory tests and analysis are reported relating to integrating sulfur and alkali control with the particle filter function.

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