Thermal aging effect in oxi-reduction properties and catalytic activity of CZ and Pd-CZ catalyst

Quimica nova

Neumann, Reiner¹  Cardoso, Mauri José Baldini²  Hori, Carla Eponina³  Silva, Daniela Cruz Damasceno da⁴  Zotin, Fátima Maria Zanon⁴ 

[1] Centro de Tecnologia Mineral, Rio de Janeiro, Brasil;PETROBRAS, Rio de Janeiro, Brasil;Universidade Federal de Uberlândia, Uberlândia, Brasil;Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brasil

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

DOI  :  10.1590/S0100-40422012000200011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Automotive catalyst,using in Brazil since 1992, is a essential technology for vehicular emissionscontrol. Noble metals are the active phase of these catalysts, and cerium zirconiummixed oxides (CZ), responsibles for the oxygen storage capacity (OSC), one ofthe most important aspect for the operational performance of the catalyst. Inthis context, the oxireduction properties analysis of CZ and Pd/CZ (palladiumsupported in CZ) system are the objective of this study, as well as, the impactof 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