Syngas production via CO2 reforming of methane over noble metal (Ru, Pt, and Pd) doped LaAlO3 perovskite catalyst

Anil, C and Modak, JM and Madras, G (2020) Syngas production via CO2 reforming of methane over noble metal (Ru, Pt, and Pd) doped LaAlO3 perovskite catalyst. In: Molecular Catalysis, 484 .

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Abstract

Recently perovskite materials have received extensive attention for dry reforming of methane (DRM) reaction due to their stable ordered crystalline structure. In this work, materials with ionic substitutions of Ru, Pt, and Pd in LaAlO3 perovskite were synthesized using solution combustion synthesis route. The characterizations of catalysts were carried out by XRD, TEM, XPS, STEM, and BET surface area analyser. H2-TPR was performed to examine the strong metal support interaction between active metal and support that improve the resistance of the perovskite structure. The catalytic activity of these catalysts was examined for DRM. Stable conversion of both CH4 and CO2 were observed on stability test experiments for 50 h over Ru substituted LaAlO3 catalyst. This indicates that it is a highly stable and coke resistant catalyst for DRM. TEM and STEM results show the deactivation of Pt and Pd incorporated LaAlO3 due to sintering and carbon deposition. The apparent activation energy was determined from Arrhenius plot which was found to be 86 kJ mol−1 and 72 kJ mol−1 over LaAl0.98Ru0.02O3-δ for CH4 and CO2 consumption, respectively. DRM reaction mechanism was proposed via formation of oxycarbonates over LaAl0.98Ru0.02O3-δ

Item Type:	Journal Article
Publication:	Molecular Catalysis
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to the Elsevier B.V.
Keywords:	Activation energy; Aluminum compounds; Arrhenius plots; Carbon dioxide; Catalyst activity; Combustion synthesis; Methane; Nanocrystalline materials; Palladium; Perovskite; Sintering; Synthesis gas; Synthesis gas manufacture, Apparent activation energy; CO2 reforming of methane; Dry reforming-of-methane; LaAlO3perovskite; Perovskite structures; Solution combustion synthesis; Strong metal support interaction; Syn-gas, Lanthanum compounds
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	02 Feb 2023 04:46
Last Modified:	02 Feb 2023 04:46
URI:	https://eprints.iisc.ac.in/id/eprint/79702

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