Zirconium-Containing Compositions with a Component Ratio Characteristic of the Garnet Structure: Physicochemical and Catalytic Properties Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
||
|---|---|---|---|
| Output data | Year: 2000, Volume: 41, Number: 6, Pages: 816-825 Pages count : 10 DOI: 10.1023/A:1026685422492 | ||
| Tags | Oxidation; Precipitation; Physical Chemistry; Surfactant; Hydrocarbon | ||
| Authors |
|
||
| Affiliations |
|
Abstract:
The possibility for the formation of garnet in the Mn-Fe-Zr-O and Ca-Sm-Zr-O catalytic systems, derived by the precipitation of the corresponding salts, was investigated. The physicochemical and catalytic properties of these systems in the complete oxidation of hydrocarbons were tested. In the Mn-Fe-Zr-O system, garnet was crystallized at 860°-920°C, for which probable cation distribution was estimated to be {Zr2.5 4+Mn0.5 2+} [Mn2 2+](Fe2.5 3+ Mn0.5 3+)O12. In the Ca-Sm-Zr-O system, the perovskite CaZrO3, pyrochlore Sm2Zr2O7, and CaO were formed at 900°-1200°C, but no compounds with garnet structures were observed. The systems had surface areas of 300-450 sq m/g at ≤450°C and polydisperse distribution of pores over sizes. The addition of surfactants during component mixing caused an increase in the overall pore volume and mechanical strength of the systems. The Mn-Fe-Zr and Ca-Sm-Zr compositions proved active for the complete oxidation of hydrocarbons. The activity of the Mn-Fe-Zr-O sample, calcined at a higher temperature than other catalysts, was comparable to that of other samples. A switch from a catalyst with 1-2 mm grains to granules did not lead to a considerable decrease in activity. The use of the Mn-Fe-Zr-O catalyst in the form of rings was favorable for the more efficient use of the active component compared with known catalysts.
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
Cite:
Ivanova A.S.
, Mikhan’ M.V.
, Alikina G.M.
, Litvak G.S.
, Moroz E.M.
, Burgina E.B.
Zirconium-Containing Compositions with a Component Ratio Characteristic of the Garnet Structure: Physicochemical and Catalytic Properties
Kinetics and Catalysis. 2000. V.41. N6. P.816-825. DOI: 10.1023/A:1026685422492 WOS Scopus РИНЦ РИНЦ ANCAN OpenAlex
Zirconium-Containing Compositions with a Component Ratio Characteristic of the Garnet Structure: Physicochemical and Catalytic Properties
Kinetics and Catalysis. 2000. V.41. N6. P.816-825. DOI: 10.1023/A:1026685422492 WOS Scopus РИНЦ РИНЦ ANCAN OpenAlex
Original:
Иванова А.С.
, Михань М.В.
, Аликина Г.М.
, Литвак Г.С.
, Мороз Э.М.
, Бургина Е.Б.
Цирконийсодержащие композиции с соотношением компонентов, характерным для структуры граната: физико-химические и каталитические свойства
Кинетика и катализ. 2000. Т.41. №6. С.897-906. Scopus РИНЦ
Цирконийсодержащие композиции с соотношением компонентов, характерным для структуры граната: физико-химические и каталитические свойства
Кинетика и катализ. 2000. Т.41. №6. С.897-906. Scopus РИНЦ
Dates:
| Submitted: | Jul 30, 1999 |
| Published print: | Nov 1, 2000 |
Identifiers:
| Web of science: | WOS:000166250600018 |
| Scopus: | 2-s2.0-0043282235 |
| Elibrary: | 43191205 | 44930693 |
| Chemical Abstracts: | 2001:30621 |
| Chemical Abstracts (print): | 134:243205 |
| OpenAlex: | W348416894 |