NDLI: Zirconium-Containing Compositions with a Component Ratio Characteristic of the Garnet Structure: Physicochemical and Catalytic Properties

Content Provider	SpringerLink
Author	Ivava, A. S. Mikhan', M. V. Alikina, G. M. Litvak, G. S. Moroz, E. M. Burgina, E. B.
Copyright Year	2000
Abstract	The possibility for the formation of garnet structures in the Mn–Fe–Zr–O and Ca–Sm–Zr–O systems obtained by the precipitation of the corresponding salts is studied. It is shown that, in the Mn–Fe–Zr–O system, garnet is crystallized at 860–920°C, for which probable cation distribution is estimated to be {Zr$_{2.5}$ $^{4+}$Mn$_{0.5}$ $^{2+}$}[Mn$_{2}$ $^{2+}$](Fe$_{2.5}$ $^{3+}$Mn$_{0.5}$ $^{3+}$)O$_{12}$. In the Ca–Sm–Zr–O system, the perovskite CaZrO$_{3}$, pyrochlore Sm$_{2}$Zr$_{2}$O$_{7}$, and CaO are formed at 900–1200°C, but compounds with garnet structures are not found. The reported systems are characterized by surface areas of 300–450 m$^{2}$/g at ≤450°C, and they have the polydisperse distribution of pores over sizes. The introduction of surfactants at the stage of component mixing enables an increase in the overall pore volume and mechanical strength of these systems. The Mn–Fe–Zr and Ca–Sm–Zr compositions are active catalysts for the complete oxidation of hydrocarbons.
Starting Page	816
Ending Page	825
Page Count	10
File Format	PDF
ISSN	00231584
Journal	Kinetics and Catalysis
Volume Number	41
Issue Number	6
e-ISSN	16083210
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2000-01-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Computer Science Applications Catalysis Modeling and Simulation Chemistry

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