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Title: | Effect of calcination temperature on the structural characteristics and catalytic activity for propene combustion of sol–gel derived lanthanum chromite perovskite |
Authors: | Benabbas, Abderrahim |
Keywords: | LaCrO3–LaCrO4; Perovskite; Sol–gel; Calcination temperature; C3H6 combustion; SOFC |
Issue Date: | Mar-2007 |
Publisher: | universite de bouira |
Citation: | Elsevier Science |
Abstract: | The perovskite type lanthanum chromite LaCrO3 has been synthesized by a sol–gel method. Its bulk structural and surface characteristics have been examined by X-ray diffraction (XRD), SEM, SBET measurements, Fourier Transform Infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) as a function of the calcination treatment performed between 200 and 1000 8C over the precursor powder and in correlation with information achieved from TG-DTA thermal analysis. The characterization results are employed to rationalize the catalytic behaviour of the system towards propene complete oxidation. It is shown that the catalytic activity becomes optimized when a single perovskite LaCrO3 phase is achieved upon calcination at T > ca. 700 8C. In contrast, coexistence of perovskite LaCrO3 and monazite LaCrO4 at lower calcination temperatures appears detrimental to the combustion activity of the system. # 2007 Elsevier B.V. All rights reserved. |
URI: | http://dspace.univ-bouira.dz:8080/jspui/handle/123456789/6879 |
Appears in Collections: | Articles |
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File | Description | Size | Format | |
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Effect of calcination temperature on the structural characteristics and catalytic activity for propene combustion of sol–gel derived lanthanum chromite perovskite.pdf | 316,37 kB | Adobe PDF | View/Open |
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