Transition Metal (Ni, Cu and Fe) Substituted Co 3 O 4 -ZrO 2 Catalysts for Lean Methane Combustion

Singh, SA and Madras, G and Sreedhar, I (2020) Transition Metal (Ni, Cu and Fe) Substituted Co 3 O 4 -ZrO 2 Catalysts for Lean Methane Combustion. In: Topics in Catalysis . (In Press)

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Abstract

Transition metal (Ni, Cu and Fe) substituted Co 3 O 4-ZrO 2 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 CO 2 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, SO 2 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 SO 2 in reactant feed using packed bed catalytic activity studies and in situ FTIR. Among all catalysts, FeCZ has shown superior catalytic activity even under SO 2 in the feed compared to NiCZ and CuCZ. The apparent activation energy was found to be larger in case of SO 2 presence for all the catalysts. The structural and reducibility properties have been characterized with the XRD, XPS, TEM and H 2-TPR studies.

Item Type:	Journal Article
Publication:	Topics in Catalysis
Publisher:	Springer
Additional Information:	The 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:	13 Apr 2023 09:58
URI:	https://eprints.iisc.ac.in/id/eprint/66853

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