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Transition Metal (Ni, Cu and Fe) Substituted Co3O4 � ZrO2 Catalysts for Lean Methane Combustion

Singh, SA and Madras, G and Sreedhar, I (2020) Transition Metal (Ni, Cu and Fe) Substituted Co3O4 � ZrO2 Catalysts for Lean Methane Combustion. In: Topics in Catalysis . (In Press)

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Official URL: https://dx.doi.org/10.1007/s11244-020-01382-0

Abstract

Transition metal (Ni, Cu and Fe) substituted Co3O4�ZrO2 catalysts (NiCZ, CuCZ and FeCZ, respectively) were synthesized by PEG assisted sonochemical synthesis and tested for lean methane combustion. These catalysts offered complete combustion of methane by generating CO2 and steam as products. The strong metal-support interaction (SMSI) allowed the high catalytic activity at temperatures below 600 °C. All catalysts have shown superior stability for 20 h of time on stream conditions. In practical conditions, SO2 presence is obvious in methane feed, even trace levels of it inhibits the catalytic activity to a greater extent. In this study, the performance of catalysts and reaction mechanism was evaluated in presence of SO2 in reactant feed using packed bed catalytic activity studies and in situ FTIR. Among all catalysts, FeCZ has shown superior catalytic activity even under SO2 in the feed compared to NiCZ and CuCZ. The apparent activation energy was found to be larger in case of SO2 presence for all the catalysts. The structural and reducibility properties have been characterized with the XRD, XPS, TEM and H2�TPR studies. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Item Type: Journal Article
Publication: Topics in Catalysis
Publisher: Springer
Additional Information: Copyright to this article belongs to Springer
Keywords: Activation energy; Cobalt compounds; Combustion; Copper; Iron compounds; Methane; Nickel compounds; Packed beds; Sonochemistry; Sulfur dioxide; Zirconia, Apparent activation energy; In-situ FT-IR; Methane combustion; Reactant feeds; Reaction mechanism; Sonochemical synthesis; Strong metal support interaction; Time on streams, Catalyst activity
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 11 Dec 2020 09:59
Last Modified: 11 Dec 2020 09:59
URI: http://eprints.iisc.ac.in/id/eprint/66853

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