Abstract: Processes occurring during mechanochemical activation (MA) of γ-Al2O3 are studied by physicochemical methods. As a result of MA, the surface concentration of coordinatively unsaturated aluminum ions falls. The concentration of strong Lewis acid sites decreases by two orders of magnitude, and that of weak Lewis centers falls several times, whereas the bulk concentration of octahedrally and tetrahedrally coordinated aluminum ions remains unchanged. MA of γ-Al2O3 is shown to suppress coke formation. The reason behind this effect is the decrease in the concentration of acceptor sites involved in the active sites responsible for coke formation at the surface of alumina The strongest acceptor sites vanish at the initial stages of MA. The contribution of these centers in the coke formation on alumina is insignificant, whereas the weaker acceptor sites that are more resistant to MA make an essential contribution.

Cite: Chesnokov V.V. , Molchanov V.V. , Paukshtis E.A. , Konovalova T.A.
The Influence of Mechanochemical Activation on Coke Formation on Aluminum Oxide
Kinetics and Catalysis. 1995. V.36. N5. P.698-700. WOS РИНЦ ANCAN

Original: Чесноков В.В. , Молчанов В.В. , Паукштис Е.А. , Коновалова Т.А.
Влияние механохимической активации на зауглероживание оксида алюминия
Кинетика и катализ. 1995. Т.36. №5. С.759-762. РИНЦ

Dates:

Submitted:

Jun 27, 1994

Identifiers:

Web of science:	WOS:A1995TE83400022
Elibrary:	29284550
Chemical Abstracts:	1995:947664
Chemical Abstracts (print):	123:345175

Citing:

DB	Citing
Web of science	3
Elibrary	2