The Ni/ZrO2 catalyst and the methanation of CO and CO2

被引：198

作者：

da Silva, Daniela C. D. ^{[1
,2
]}

Letichevsky, Sonia ^{[1
]}

Borges, Luiz E. P. ^{[2
]}

Appel, Lucia G. ^{[1
]}

机构：

[1] Inst Nacl Tecnol, Lab Catalise, BR-21081312 Rio De Janeiro, RJ, Brazil

[2] Inst Mil Engn, BR-22290270 Rio De Janeiro, RJ, Brazil

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 11期

关键词：

Methanation; Zirconia; Nickel; Carbon monoxide; Carbon dioxide; CARBON-MONOXIDE; SELECTIVE METHANATION; REMOVAL; DIOXIDE; NICKEL;

D O I：

10.1016/j.ijhydene.2012.03.020

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 Ni/ZrO2 catalyst is one of the most active systems for the methanation of CO to be employed in the hydrogen purification for PEMFC. This contribution aims to study the effect of ZrO2 on the methanation of CO and CO2. The catalytic behavior of Ni/ZrO2, Ni/SiO2, a physical mixture comprising Ni and ZrO2, and a double-bed reactor were evaluated. The TPD of CO and CO2, TPSR and the cyclohexane dehydrogenation reaction were carried out to describe the catalysts and the reactions. The high activity of Ni/ZrO2 catalyst toward the methanation of CO is related to the presence of active sites on the ZrO2 surface. The methanation of CO occurs on ZrO2 due to its ability to adsorb CO and also because of the hydrogen spillover phenomenon. Apparently, the effect of ZrO2 is less relevant for the methanation of CO2. Ni/ZrO2 is a very promising system for the purification of hydrogen. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：8923 / 8928

页数：6

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