A comparative study of substituted perovskite-type solids of oxidic La1-xSrxFeO3 +/-delta and chlorinated La1-xSrxFeO3 +/-delta Cl sigma form: Catalytic performance for CH4 oxidation by O-2 or N2O (EN)

Leontiou, A. A. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)

Leontiou, A. A. (EN)

comparative study between two groups of substituted perovskite-type solids, one oxidic and another chlorinated with general formulas La1-xSrxFeO3+/-delta and La1-xSrxFeO3+/-delta Cl sigma (x = 0.0, 0.4,0.6 and 0.8), was carried out for the oxidation of CH4 by O-2 and N2O. For stoichiometric feeding compositions CH4:O-2 = 1:2 and CH4:N2O = 1:4, the catalysts were active in the temperature range 400-760 degrees C. The oxidic solids were more active than the chlorinated ones. Catalysts of both groups, containing Sr, exhibited a drop in activity for the above reactions, related to an increased amount of desorbed oxygen from the solids. The amount of desorbed oxygen is linearly correlated with the Fe4+ content in the solid. The lower activity of the chlorinated samples can be attributed to a poisoning effect by chlorine, the quantity of which was estimated using proper deactivation kinetics. (c) 2007 Elsevier Inc. All rights reserved. (EN)

perovskite (EN)

Πανεπιστήμιο Ιωαννίνων

Ιδρυματικό Αποθετήριο Ολυμπιάς

Σχολή Θετικών Επιστημών

Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

ΑΠΟΘΕΤΗΡΙΟ "ΟΛΥΜΠΙΑΣ"

Τμήμα Χημείας

Journal of Catalysis (EN)

Αγγλική γλώσσα

2007

http://olympias.lib.uoi.gr/jspui/handle/123456789/9979

<Go to ISI>://000250015700011

Elsevier (EN)