Plasma catalysis over lanthanum substituted perovskites |
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| Affiliation: | 1. Multiphase Reactors Engineering and Applications Laboratory (mReal), Department of Chemical & Biochemical Engineering, Missouri University of Science & Technology, Rolla, MO 65409, USA;2. Chemical Engineering Department, College of Engineering, Al-Nahrain University, Baghdad, Iraq;3. Cihan University, Erbil, Iraq;4. Prosthetics and Orthotics Engineering Department, College of Engineering, Al-Nahrain University, Baghdad, Iraq;1. Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, 89081 Ulm, Germany;2. Central Facility of Electron Microscopy, Group of Electron Microscopy of Material Science, University of Ulm, 89081 Ulm, Germany;1. Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China;2. Datang International Power Generation co., LTD High Alumina Coal Resources Development and Utilization R&D Center, Ordos 017100, China |
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| 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. |
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