O efeito da desativação térmica nas propriedades oxirredutoras e na atividade catalítica de catalisadores CZ e Pd-CZ

Química Nova

Daniela Cruz Damasceno Da Silva²  Fátima Maria Zanon Zotin²  Reiner Neumann¹  Carla Eponina Hori¹  Mauri José Baldini Cardoso¹ 

[1] ,Universidade do Estado do Rio de Janeiro Departamento de Operações e Projetos Industriais Rio de Janeiro RJ ,Brasil

关键词: cerium-zirconium mixed oxide;    thermal aging;    automotive catalyst;   

DOI  :  10.1590/S0100-40422012000200011

来源: SciELO

【 摘 要 】

Automotive catalyst, using in Brazil since 1992, is a essential technology for vehicular emissions control. Noble metals are the active phase of these catalysts, and cerium zirconium mixed oxides (CZ), responsibles for the oxygen storage capacity (OSC), one of the most important aspect for the operational performance of the catalyst. In this context, the oxireduction properties analysis of CZ and Pd/CZ (palladium supported in CZ) system are the objective of this study, as well as, the impact of the thermal aging in the OSC. Aging consisted of treatments at 900 or 1200 °C, for 12 or 36 h, in oxidizing condition.

【 授权许可】

CC BY-NC   
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