Departmental Papers (CBE)
Title
Determining the Ce2O2S-CeOx Phase Boundary for Conditions Relevant to Adsorption and Catalysis
Document Type
Journal Article
Date of this Version
July 2003
Abstract
The interaction of sulfur with ceria under highly reducing conditions was investigated. The phase boundary between CeO1.83 and Ce2O2S was determined for temperatures between 873 and 1073 K. This data was used to derive an empirical equation for ΔGfº of Ce2O2S in this temperature range. This equation along with thermodynamic data for cerium oxides and sulfides obtained form the literature was used to predict Ce-O-S phase diagrams at 873 and 973 K. These phase diagrams provide insight into the mechanism of the deactivation of ceria-based catalysts by sulfur under reducing conditions.
Keywords
Ceria, Cerium oxysulfide, Sulfur, Adsorption
Date Posted: 25 January 2006
This document has been peer reviewed.
Comments
Postprint version. Published in Applied Catalysis B: Environmental, Volume 43, Issue 3, 10 July 2003, pages 273-280.
Publisher URL: http://dx.doi.org/10.1016/S0926-3373(02)00323-5