Baker, TK
1992
Stability of Supported Catalysts: Sintering and Redispersion
Bartholomew, C.H.; Baker, T.K.; Dayburjor, D.B. and Horsley, J.S.
Catalytica Studies Division, January 1992, Funded by Catalytica.
Catalysts comprising a metallic component on a refractory support are widely used in petroleum processing, chemical synthesis, and pollution control. Supported metal catalysts are subjected to high temperatures during use or regeneration. At these high temperatures, the activity of these catalysts declines because the surface areas of the metallic component and/or the support decrease. In general, the effects of surface area loss are more difficult to overcome than the effects of carbon deposition or poisoning. The sintering processes that lead to loss of surface area involve complex physicochemical phenomena. An understanding of the mechanism of sintering is important in developing new catalysts and in regenerating deactivated catalysts, and considerable research is being devoted to understanding the mechanisms of sintering and to reversing the effects of sintering. This study analyzes the causes and mechanisms of sintering, critically reviews the relevant scientific and patent literature, and recommends ways in which sintering can be minimized and deactivated catalysts can be regenerated.
Baker, TK
1992
Stability of Supported Catalysts: Sintering and Redispersion
Bartholomew, C.H.; Baker, T.K.; Dayburjor, D.B. and Horsley, J.S.
Catalytica Studies Division, January 1992, Funded by Catalytica.
Catalysts comprising a metallic component on a refractory support are widely used in petroleum processing, chemical synthesis, and pollution control. Supported metal catalysts are subjected to high temperatures during use or regeneration. At these high temperatures, the activity of these catalysts declines because the surface areas of the metallic component and/or the support decrease. In general, the effects of surface area loss are more difficult to overcome than the effects of carbon deposition or poisoning. The sintering processes that lead to loss of surface area involve complex physicochemical phenomena. An understanding of the mechanism of sintering is important in developing new catalysts and in regenerating deactivated catalysts, and considerable research is being devoted to understanding the mechanisms of sintering and to reversing the effects of sintering. This study analyzes the causes and mechanisms of sintering, critically reviews the relevant scientific and patent literature, and recommends ways in which sintering can be minimized and deactivated catalysts can be regenerated.