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Plasma catalysis over lanthanum substituted perovskites

Paper ID Volume ID Publish Year Pages File Format Full-Text
52575 46877 2007 4 PDF Available
Title
Plasma catalysis over lanthanum substituted perovskites
Abstract

The removal of CH4 (3600 ppm) with O2 (3 × 104 ppm) in mixtures with Ar or N2 as carrier gas has been studied in a plasma-catalyst system. The plasma yields CO plus H2O as majority products. A small extra oxidation to CO2 is found at 338 K when a catalyst (SiO2 or La1−xSrxCoO3−d (x = 0.5) perovskite) is placed in the glow zone of the plasma. With the perovskite, the oxidation efficiency to CO2 increased with temperature up to 90% at 453 K. This result supports that this lanthanum substituted cobaltite further activates the plasma species producing a synergetic effect where the specific surface area is not a critical factor as previously reported in the literature.

Keywords
Plasma catalysis; Optical emission spectroscopy; Methane oxidation; Perovskites
First Page Preview
Plasma catalysis over lanthanum substituted perovskites
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 11, November 2007, Pages 1739–1742
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis