Statistical analysis and optimization of temperature programmed reduction (TPR) analysis

Quimica nova

Moreno, Esteban Lopez¹  Andrade, Heloysa Martins Carvalho²  Nele, Marcio³ 

[1] Centro de Tecnologia Mineral, Rio de Janeiro, Brasil;Universidade Federal da Bahia, Salvador, Brasil;Universidade Federal de Rio de Janeiro, Rio de Janeiro, Brasil

关键词: TPR;    temperature programmed reduction;    experimental design.;   

DOI  :  10.1590/S0100-40422006000400003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The effect ofoperational variables and their interaction in TPR profiles was studied usinga fractional factorial experimental design. The heating rate and the reducingagent concentration were found to be the most important variables determiningthe resolution and sensitivity of the technique. They showed opposite effects.Therefore, they should be manipulated preferentially in order to obtain optimizedTPR profiles. The effect of sample particle size was also investigated. Thetests were carried out within a Cu/Zn/Al2O3 catalyst usedfor the water-gas shift reaction that presented two distinct species of Cu2+in TPR profiles.

【 授权许可】

CC BY