Effect of High-Temperature Oxidative Treatments on the State and Catalytic Activity of Aluminum-Platinum Catalysts in Reactions of Deep Oxidation of Alkanes | Sciact - CRIS-system of Boreskov Institute of Catalysis

Effect of High-Temperature Oxidative Treatments on the State and Catalytic Activity of Aluminum-Platinum Catalysts in Reactions of Deep Oxidation of Alkanes Full article

Journal

Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210

Output data

Year: 1989, Volume: 30, Number: 4 pt 1, Pages: 773-777 Pages count : 5

Authors

Drozdov V.A. ¹ , Kochubey D.I. ² , Tsyrulʹnikov P.G. ¹ , Popovskii V.V. ²

Affiliations

1	Omsk Department of the Institute of Catalysis, USSR
2	Institute of Catalysis, Siberian Branch, Academy of Sciences of the USSR

Calcination of Pt/Al2O3 catalysts at 773-1273 K caused specific activity per g of Pt to decrease as temperature increased. Adsorption, x-ray phase analysis, and electron microscopy, showed that the decrease in activity is due to Pt particle sintering and to changes in phase composition and texture of the support. Treatment at ≤1080 K has almost no effect on catalyst specific activity per unit surface area of Pt, but treatment of >1020-1080 K increases specific activity per unit surface area sharply (5-15 fold). The increase is not due to loss of Cl- which changes the stability of the Pt-O adsorbed bond as av. Pt crystal size increases. Instead, the effect is due to a change in chemical composition of the calcined catalysts and to an increase in surface Pt/Ptn+ ratio. An EXAFS study confirmed that calcination decreased the amt. of "oxide" Pt (Pt-O sepn. 202 ± 0.02 Å) and increased the amt. of metallic Pt (Pt-Pt sepn. 2.74 ± 0.04 Å).

Drozdov V.A. , Kochubey D.I. , Tsyrulʹnikov P.G. , Popovskii V.V.
Effect of High-Temperature Oxidative Treatments on the State and Catalytic Activity of Aluminum-Platinum Catalysts in Reactions of Deep Oxidation of Alkanes
Kinetics and Catalysis. 1989. V.30. N4 pt 1. P.773-777. WOS РИНЦ

Дроздов В.А. , Кочубей Д.И. , Цырульников П.Г. , Поповский В.В.
Влияние высокотемпературных окислительных обработок на состояние и каталитическую активность алюмоплатиновых катализаторов в реакциях глубокого окисления алканов
Кинетика и катализ. 1989. Т.30. №4. С.879-884. РИНЦ ANCAN

Submitted:	Jan 19, 1988
Published print:	Jul 1, 1989

Web of science:	WOS:A1989CW51300019
Elibrary:	24497493

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