Infrared study of the adsorption of pyridine on. cap alpha. -Al/sub 2/O/sub 3/

Journal Article · Fri Oct 13 04:00:00 EDT 1978 · J. Catal.; (United States)

OSTI ID:6856233

Morterra, C; Coluccia, S; Chorino, A; Boccuzzi, F

Study of adsorption of pyridine on ..cap alpha..-Al/sub 2/O/sub 3/, calcined at 1150/sup 0/C for 12 or 22 hr showed that the length of treatment influenced the surface behavior. An analysis of the computer-resolved IR spectra suggested that a variable number of aluminum ions still possess a tetrahedral or quasi-tetrahedral coordination, which results in two types of pyridine species coordinated to octahedral and tetrahedral Lewis acid sites. The total coverage on both materials was Vertical Bar3; 20Vertical Bar3< at 8 mm Hg; the concentration of defective aluminum centers able to coordinate pyridine was approx. 1 and approx. 0.5/sq nm on the less and more severely treated alumina, respectively.

• Research Organization: Univ. of Torino
• OSTI ID: 6856233
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 54:3; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical &amp; Physicochemical Properties
400301* -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AZINES
CHALCOGENIDES
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INORGANIC ACIDS
LEWIS ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRIDINE
PYRIDINES
SORPTION
SPECTRA
STRUCTURE FACTORS
SURFACE PROPERTIES