Effect of MgO addition on the basicity of Ni/ZrO2 and on its catalytic activity in carbon dioxide reforming of methane

被引：142

作者：

Garcia, Veronica ^{[1
]}

Fernandez, Jhon J. ^{[1
]}

Ruiz, Wilson ^{[1
]}

Mondragon, Fanor ^{[1
]}

Moreno, Andres ^{[1
]}

机构：

[1] Univ Antioquia, Inst Chem, Medellin 1226, Colombia

来源：

CATALYSIS COMMUNICATIONS | 2009年 / 11卷 / 04期

关键词：

Methane reforming; Magnesia-stabilized zirconia; Ni/ZrO2; catalyst; Activation energy of CO2 desorption; SYNTHESIS GAS; PARTIAL OXIDATION; NI CATALYSTS; CO2; ZIRCONIA; NICKEL; SUPPORT; OXIDE; CH4; DESORPTION;

D O I：

10.1016/j.catcom.2009.10.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of the MgO content on the basicity and on the catalytic performance of Ni/ZrO2-MgO catalysts for carbon dioxide reforming of methane was studied. MgO addition to the zirconia support by co-precipitation (5% MgO) had several effects: stabilized the zirconia tetragonal phase by increasing its thermal stability, increased the basicity of the support, and decreased the reducibility of Ni2+. The CO2 desorption energy distribution functions calculated from the TPD-CO2 profiles were centred at activation energies around 100-134 kJ mol(-1). Besides the effect due to the modification of the zirconia properties by MgO addition, the catalytic activity was also related to the reduction degree of nickel on Ni/ZrO2-MgO catalysts, while the catalyst stability was related to the basic properties of the supports. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：240 / 246

页数：7

共 40 条

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