Improved Refractories for IGCC Power Systems
Sponsor DOE Office of Fossil Energy

DOE National Energy Technology Laboratory
Sponsor Contacts Fred M. Glaser

Udaya S. Rao
Organization Albany Research Center
Contact Cynthia P. Dogan

The focus of this project at the Albany Research Center is to develop improved materials, capable of withstanding the harsh, high-temperature environment created by the gasification reaction.
The materials work includes both the refractory lining that insulates the slagging gasifier, as well as the thermocouple assemblies that are utilized to monitor gasifier operating temperatures.

Refractory liners in slagging gasifiers typically are replaced every 10 to 18 months, at costs ranging up to $2-million. In addition, the gasifier is off-line for the refractory exchange for three to four weeks.

Also, thermocouple devices rarely survive the gasifier start-up process and must be replaced.

Accordingly, the goals of this project include the development of a refractory liner with a service life at least double that of current-generation refractory materials, and the design of a thermocouple protection system that will allow accurate temperature monitoring for extended periods of time.
Cross sections of (a) a conventional 90% chrome refractory, and (b) ARC’s modified refractory following exposure to a coal slag at 1600º C.

The depth of slag penetration is marked in each case.