Reduction kinetics of a CuO/ZnO/Al2O3 catalyst

被引：0

作者：

Nele, Marcio ^{[1
]}

Moreno, Esteban Lopez ^{[2
]}

Carvalho Andrade, Heloysa Martins ^{[3
]}

机构：

[1] Univ Fed Rio de Janeiro, Escola Quim, BR-21949900 Rio De Janeiro, Brazil

[2] Fdn Ctr Ciencias & Educ Super Distancia Estado Ri, BR-2093001 Rio De Janeiro, Brazil

[3] Univ Fed Bahia, Inst Quim, Dept Quim Geral & Inorgan, BR-40170290 Salvador, BA, Brazil

来源：

QUIMICA NOVA | 2007年 / 30卷 / 08期

关键词：

kinetics of reduction; thermoprogrammed reduction; activation energy;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reduction kinetics of a CuO/ZnO/Al2O3 catalyst by hydrogen was investigated isothermally and by temperature programmed reduction (TPR). Two reducible Cu2+ species were detected; the first one was identified as CuO bulk and the other as Cu2+ Strongly interacting with alumina, possibly in the form of copper aluminate. The activation energies for the reduction of these two species were 60 and 90 kJ mol(-1), respectively, and the reaction order with respect to hydrogen was one. The isothermal reduction data showed that the isotropic growth model is the most appropriate to describe the reaction rate data for both Cu2+ species.

引用

页码：1813 / 1819

页数：7

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