fulltext.study @t Gmail

Methane combustion over PdO-alumina catalysts: The effect of palladium precursors

Paper ID Volume ID Publish Year Pages File Format Full-Text
49020 46541 2006 6 PDF Available
Title
Methane combustion over PdO-alumina catalysts: The effect of palladium precursors
Abstract

The role of palladium precursors and the preparation route in the catalytic properties of PdO/Al2O3 catalysts toward methane oxidation was investigated in this paper. The catalysts were prepared using palladium chloride, nitrate and acetylacetonate as precursors and the preparation routes employed were impregnation of alumina with solutions of these precursors and the polyol method, in which palladium deposition is carried in a liquid polyol, e.g. ethylene glycol. All catalysts were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), transmission electron microscopy (TEM), surface area measurements and temperature programmed desorption of O2 (TPD). Unsteady-state methane oxidation was carried out by temperature-programmed surface reaction (TPSR). The results obtained suggested that the use of different palladium precursors and preparation routes played an important role on the properties of the catalysts, as palladium particle size, thermal stability of PdO and catalytic properties toward methane combustion. The use of palladium acetylacetonate as precursor by the impregnation method generated well-dispersed PdO particles on alumina. Regarding the PdO thermal stability and the activity toward methane combustion, this catalyst also presented the highest thermal stability and catalytic activity.

Keywords
Methane combustion; Pdo-alumina catalysts; Palladium precursors
First Page Preview
Methane combustion over PdO-alumina catalysts: The effect of palladium precursors
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 63, Issues 1–2, 22 March 2006, Pages 9–14
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis