- Gazi University Journal of Science
- Vol: 17 Issue: 2
- A COMPARATIVE STUDY OF SILVER â COBALT AND SILVER â MANGANESE COMPOSITE OXIDE CATALYSTS: PREPARA...
A COMPARATIVE STUDY OF SILVER â COBALT AND SILVER â MANGANESE COMPOSITE OXIDE CATALYSTS: PREPARATION, CHARACTERIZATION AND TESTING FOR THE OXIDATION OF CO
Authors : Filiz Balikçi, Çiğdem Güldür
Pages : 115-128
View : 20 | Download : 5
Publication Date : 2010-08-06
Article Type : Other
Abstract :ABSTRACT Silver-cobalt and silver-manganese composite oxides were prepared by co-precipitation method at different metal/metal oxide molar ratio and by different rates of preparation. The catalysts were characterised by X-Ray diffraction, BET and TGA. The CO oxidation studies were carried out in a micro reactor and reaction was formed under dry and wet atmospheres for a binary CO + air and CO + CO 2 H 2 O + air gas mixtures. 1:1 Ag/Co prepared by the slow precipitation and 1:1 Ag/Mn prepared by the opposite slow precipitation gave the best performance for the dry conditions. Activity of these catalysts significantly decreased when the water vapor and CO 2 was added to the feed. Silver-cobalt composite oxide catalyst shows a higher performance than the silver-manganese composite oxide catalyst for the wet atmospheres. Keywords: CO oxidation, catalyst, co-precipitation, low-temperatureKeywords : CO oxidation, catalyst, co-precipitation, low-temperature