Abstract
An Ni metal catalyst manufactured by the tapecasting method for use as a structural catalyst did not exhibit catalytic activity for the carbon monoxide (CO) removal reaction. However, the catalyst pretreated by an oxidation and reduction process showed superior activity for CO removal via water-gas shift and methanation, resulting in a decrease of the CO concentration to below 1% in reformate gas. The catalytic activity was generated by the reorganization of the surface structure of Ni metal, and enhanced by surface oxygen intermediates such as Ni(OH)2 and NiOOH promoted by NiO oxidized incompletely after the pretreatment. After the reorganization process induced by the pretreatment, the Ni metal on the surface was converted to active Ni and NiO which played the role of a promoter.
| Original language | English |
|---|---|
| Pages (from-to) | 97-104 |
| Number of pages | 8 |
| Journal | Applied Catalysis B: Environmental |
| Volume | 81 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 2008 May 30 |
Bibliographical note
Funding Information:This work was financially supported by the Center for Fuel Cell Research of Korea Institute of Science and Technology, and by the ERC program of MOST/KOSEF (Grant No. R11-2002-102-00000-0).
Keywords
- Carbon monoxide
- Disk type
- Fuel processor
- Methanation
- Water-gas shift
ASJC Scopus subject areas
- Catalysis
- General Environmental Science
- Process Chemistry and Technology