Reduction of NO by CO using Pd-CeTb and Pd-CeZr catalysts supported on SiO2 and La2O3-Al2O3

被引：15

作者：

Ferrer, Victor ^{[1
]}

Finol, Dora ^{[1
]}

Solano, Roger ^{[1
]}

Moronta, Alexander ^{[1
]}

Ramos, Miguel ^{[2
]}

机构：

[1] Univ Zulia, Fac Ingn, Inst Superficies & Catalisis, Maracaibo 4003A, Venezuela

[2] Inst Zuliano Invest Tecnol, Maracaibo, Venezuela

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2015年 / 27卷

关键词：

Mixed oxides; OSC; Reduction of NO by CO; Three way catalysts; CEO2-ZRO2; SOLID-SOLUTIONS; 3-WAY CATALYSTS; MIXED OXIDES; THERMAL-STABILITY; EXHAUST CATALYSTS; OXYGEN STORAGE; SURFACE-AREA; CERIA; PALLADIUM; REDOX;

D O I：

10.1016/j.jes.2014.05.046

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The catalytic activity of Pd catalysts supported on Ce0.73Tb0.27Ox/SiO2, Ce0.6Zr0.40Ox/SiO2, Ce0.73Tb0.27Ox/La2O3-Al2O3 and Ce0.6Zr0.40Ox/La2O3-Al2O3 was studied using the reduction of NO by CO. The catalysts were characterized by X-ray fluorescence, surface area, X-ray diffraction, temperature-programmed reduction, CO chemisorption and oxygen storage capacity. Temperature-programmed reduction results indicated that Tb or Zr incorporation improves the reducibility and oxygen storage capacity. CO chemisorption data suggested the presence of large Pd0 particles due to the low CO/Pd ratio. No significant differences were obtained in light off temperatures (Tught off) for all Pd catalysts and the most active was 1.5%Pd/Ce0.6Zr0.40Ox/SiO2. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

引用

页码：87 / 96

页数：10

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