Abstract: Acid-base properties of aluminas prepared by thermal treatment of a hydrated CTA-product at 600°C were studied. The CTA-oxides, representing γ-Al2O3, were shown to contain terminal and bridged OH-groups. The concentration of the terminal OH-groups in the CTA-oxides was found to exceed their concentration in γ-Al2O3 prepared by dehydration of the “precipitated” pseudoboehmite, whereas the concentration of the bridged OH-groups in the CTA-oxides was lower than that in γ-Al2O3 prepared from pseudoboehmite. The total concentration of the surface Lewis acid sites in CTA-oxides varies within the limits of 2.80-4.14 mmol/m2 and is essentially above that in γ-Al2O3 (2.25 mmol/m2). The distinctive feature of the CTA-oxides is that their surface contains strong Lewis acid sites with νCO = 2220 and 2238 cm-1. The total concentration of basic sites in the CTA-oxides is lower than that in γ-Al2O3, however, in contrast to γ-Al2O3, they contain strong basic sites with νCDCl3 = 2200 cm-1.

Cite: Kul’ko E.V. , Ivanova A.S. , Budneva A.A. , Paukshtis E.A.
Acid-Base Properties of Alumina Prepared from a Hydrated Product of Centrifugal Thermal Activation of Hydrargillite (CTA-Product)
Reaction Kinetics and Catalysis Letters. 2006. V.88. N2. P.381-390. DOI: 10.1007/s11144-006-0075-6 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Mar 14, 2006
Accepted:	Mar 23, 2006
Published print:	Aug 1, 2006

Identifiers:

Web of science:	WOS:000239050100023
Scopus:	2-s2.0-33746082827
Elibrary:	13517249
Chemical Abstracts:	2006:924580
Chemical Abstracts (print):	146:469205
OpenAlex:	W1991611135

Citing:

DB	Citing
Web of science	12
Scopus	10
Elibrary	13
OpenAlex	13

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