scholarly journals Structural Insight into La0.5Ca0.5Mn0.5Co0.5O3 Decomposition in the Methane Combustion Process

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2283
Author(s):  
Olga Nikolaeva ◽  
Aleksandr Kapishnikov ◽  
Evgeny Gerasimov
Keyword(s):  
Solid Solution ◽  
Catalyst Deactivation ◽  
Combustion Process ◽  
Methane Combustion ◽  
Large Loss ◽  
In Situ Xrd ◽  
Oxide Particles ◽  
Structural Insight ◽  
Insight Into

Perovskite-like solid solution La0.5Ca0.5Mn0.5Co0.5O3 was tested during the total methane combustion reaction. During the reaction, there is a noticeable decrease in methane conversion, the rate of catalyst deactivation increasing with an increase in temperature. The in situ XRD and HRTEM methods show that the observed deactivation occurs as a result of the segregation of calcite and cobalt oxide particles on the perovskite surface. According to the TGA, the observed drop in catalytic activity is also associated with a large loss of oxygen from the perovskite structure.

scholarly journals X-ray Raman scattering for bulk chemical and structural insight into green carbon

2020 ◽  
Vol 22 (33) ◽  
pp. 18435-18446
Author(s):  
Luke J. R. Higgins ◽  
Christoph J. Sahle ◽  
Mahalingam Balasubramanian ◽  
Bhoopesh Mishra
Keyword(s):  
Raman Scattering ◽  
X Ray ◽  
Bulk Chemical ◽  
Structural Insight ◽  
Insight Into ◽  
Absorption Edges

X-ray Raman scattering (XRS) spectroscopy provides access to element-specific core photo-absorption edges of low Z-elements (e.g. K-edges of C, N, O), using hard X-ray photons enabling bulk and in situ study of green carbons.

Structural Insight into Redox Dynamics of Copper Bound N-Truncated Amyloid-β Peptides from in Situ X-ray Absorption Spectroscopy

2018 ◽  
Vol 57 (18) ◽  
pp. 11422-11435 ◽  
Author(s):  
Victor A. Streltsov ◽  
Ruwini S. K. Ekanayake ◽  
Simon C. Drew ◽  
Christopher T. Chantler ◽  
Stephen P. Best
Keyword(s):  
Absorption Spectroscopy ◽  
Amyloid Β ◽  
X Ray ◽  
Structural Insight ◽  
X Ray Absorption ◽  
Insight Into ◽  
Redox Dynamics

Mechanistic and kinetic insight into catalytic oxidation process of heavy oil in in-situ combustion process using copper (Ⅱ) stearate as oil soluble catalyst

Fuel ◽  
2021 ◽  
Vol 284 ◽  
pp. 118981
Author(s):  
Chengdong Yuan ◽  
Dmitrii A. Emelianov ◽  
Mikhail A. Varfolomeev ◽  
Nikolay O. Rodionov ◽  
Muneer A. Suwaid ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Heavy Oil ◽  
Oxidation Process ◽  
Combustion Process ◽  
In Situ Combustion ◽  
Insight Into

scholarly journals In Situ Raman Spectroscopy as a Tool for Structural Insight into Cation Non-Ionomeric Polymer Interactions during Ion Transport

Polymers ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 416 ◽  
Author(s):  
Krzysztof Bogdanowicz ◽  
Domenico Pirone ◽  
Judit Prats-Reig ◽  
Veronica Ambrogi ◽  
José Reina ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Ion Transport ◽  
In Situ Raman Spectroscopy ◽  
In Situ Raman ◽  
Polymer Interactions ◽  
Structural Insight ◽  
Insight Into

scholarly journals Microstructural Changes in La0.5Ca0.5Mn0.5Fe0.5O3 Solid Solutions under the Influence of Catalytic Reaction of Methane Combustion

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 563
Author(s):  
Evgeny Yu. Gerasimov ◽  
Vladimir A. Rogov ◽  
Igor P. Prosvirin ◽  
Lyubov A. Isupova ◽  
Sergey V. Tsybulya
Keyword(s):  
Methane Oxidation ◽  
Solid Solutions ◽  
Perovskite Structure ◽  
Oxidation Reaction ◽  
Perovskite Phase ◽  
Reaction Medium ◽  
Methane Combustion ◽  
Planar Defects ◽  
In Situ Xrd

This article attempts to study changes in the microstructure of solid solutions with the perovskite structure La0.5Ca0.5Mn0.5Fe0.5O3 under the action of the methane oxidation reaction medium. By the methods of XRD, XPS and HRTEM the initial condition of the structure and the surface of the perovskite were both investigated. A feature of the structure of this solid solution is the presence of planar defects in the direction of the planes (101). After the methane oxidation reaction, a similar study of perovskite structure was conducted to obtain the changes. It was shown that under the action of the reaction medium, Ca1−xMnxO particles form on the surface of the perovskite phase, while planar defects in La0.5Ca0.5Mn0.5Fe0.5O3 structure remain. In situ XRD experiments on perovskite calcination in helium current up to 750 °C showed the formation of a similar Ca1−xMnxO phase on the perovskite surface.

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