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- W2971508710 abstract "Thermal behavior of hydrotalcites, which is a calcination process, is critical to prepare the metal oxide catalysts with high performances in the practical applications. In this paper, the MgFe-LDH with Mg/Fe molar ratio of 3.0 was prepared by urea method and the calcined products are obtained by calcining at different temperatures (473 K, 573 K, 673 K, 773 K, 873 K and 973 K) under a N2 atmosphere for 4 h. The structure, morphology, texture, pyrolysis kinetics and mechanism of the MgFe-LDH were studied in detail. On one hand, based on the TG/DSC curves, Starink, Kissinger and Flynn-Wall-Ozawa (FWO) methods were used to calculate the activation energy, on the other hand, the Šatava-Šesták, Achar and Málek methods were used to define the most probable reaction mechanisms of pyrolysis behavior. The results suggested that the thermal decomposition of the LDH experienced two steps, i.e., removal of the interlayer water, followed by dehydroxylation and decarbonation. Moreover the Mákel method was used to define the most probable reaction mechanisms of the pyrolysis behavior." @default.
- W2971508710 created "2019-09-12" @default.
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- W2971508710 date "2020-03-01" @default.
- W2971508710 modified "2023-09-24" @default.
- W2971508710 title "Mechanism and Kinetics of Dehydroxylation and Decarbonation of Mg–Fe Hydrotalcite" @default.
- W2971508710 doi "https://doi.org/10.1166/jnn.2020.16958" @default.
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