Pilot-Scale Combustion Testing of Silicon-Based Ceramics

High-temperature heat exchangers in indirectly fired combined cycle (IFCC) systems: materials management and performance improvement

“…During the 1980s and 1990s, several programs funded in the United States and United Kingdom focused on the development and testing of ceramicbased heat exchangers for use in coal-fired power systems (Laws and Reed, 1986;Parthasarathy et al, 1992;Solomon et al, 1993), including another HiPPS project headed by Foster Wheeler Development Corporation (Shenker, 1993). Although the nonoxide ceramics maintained their strength at very high temperatures, they were prone to active oxidation (Jacobson, 1993) and severe corrosion by the coal slag when surface temperatures were maintained above the solidus temperature of the slag (Watne et al 1996). Because of the need to maintain material temperatures below the slag solidus temperature, the difficulty and cost of manufacturing ceramic heat exchangers, and their propensity to thermal shock failure, the UTRC HiPPS effort shifted to using high-temperature creep-resistant oxide dispersionstrengthened (ODS) alloys.…”