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

Química Nova

Silva, Daniela Cruz Damasceno da¹  Universidade Federal de Uberlândia, Uberlândia, Brasil¹  Cardoso, Mauri José Baldini¹  Centro de Tecnologia Mineral, Rio de Janeiro, Brasil¹  Zotin, Fátima Maria Zanon¹  PETROBRAS, Rio de Janeiro, Brasil¹  Hori, Carla Eponina¹  Neumann, Reiner¹  Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brasil¹ 

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 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】

Unknown