Advanced Ceramic Materials for Use in High-Temperature Particulate Removal Systems

Abstract

First-generation monolithic porous ceramic filter materials have experienced thermal fatigue, high-temperature creep, and a loss of material strength when operated for extended periods of time in advanced coal-fired combustion and gasification systems. Fiber-reinforced and advanced ceramic composites potentially provide a means to mitigate the degradation mechanisms encountered by monolithic filter matrices and ultimately extend operating life. In this paper we will review advancements which have recently been made during the development of the second-generation porous ceramic filter materials and provide insight into the performance of the filter elements during bench-scale qualification testing and operation in demonstration plant test facilities.

Effect of sintering temperature in preparation of granular ceramic filter

“…Silicon carbide (SiC) is one of the most preferable candidates for the fabrication of ceramic filters because of its high corrosion resistance, thermal shock resistance, and excellent mechanical strength [3,5,[7][8][9][10]. Ceramic filters made of silicon carbide can be manufactured by various methods, including slip casting [11,12], ramming [13], vacuum extrusion [13], melt infiltration [14], and so forth.…”

Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

“…Silicon carbide (SiC) is especially useful for the fabrication of ceramic filters because of its high temperature stability, thermal shock resistance, high corrosion resistance, and excellent mechanical properties (Alvin et al 1991;Alvin 1996;Pastila et al 2001;Li et al 2011). Ceramic filters for hot gas cleaning can be classified into fibrous ceramic filters and granular ceramic filters on the basis of their fabrication materials.…”

Factors that influence the flexural strength of SiC-based porous ceramics used for hot gas filter support

“…[1][2][3] Silicon carbide (SiC) ceramic, which has high temperature stability, low thermal expansion coefficient, high corrosion resistance, high thermal conductivity and excellent mechanical properties, is suitable material as porous ceramic supports for hot gas cleaning. [4][5][6][7][8] However, it is difficult to sinter pure SiC ceramics below 2100 • C due to its strong covalent nature. 9 One effective way of fabricating porous SiC ceramics at low temperatures is to add a small amount of bonding phases to bond SiC particles together.…”