Fourier transform infrared photoacoustic spectroscopy of pyridine adsorbed on silica-alumina and. gamma. -alumina

Journal Article · Thu May 13 00:00:00 EDT 1982 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100207a005· OSTI ID:6577347

Riseman, S M; Massoth, F E; Dhar, G M; Eyring, E M

Relative numbers of Bronsted acid to Lewis acid sites on silica-alumina have been determined photoacoustically by an infrared analysis of chemisorbed pyridine compared to similar adsorption of ..gamma..-alumina that has only Lewis sites. Results are similar to those obtained by earlier IR transmission studies that suggested the use of framework vibrations of silica as an internal reference standard. The 20% coverage of the silica-alumina surface by pyridine adsorbed at Bronsted sites found photoacoustically is in good agreement with a previous value of 17% estimated from transmission spectroscopic data. Reproducibility of the photoacoustic measurements is excellent.

• Research Organization: Univ. of Utah, Salt Lake City
• OSTI ID: 6577347
• Journal Information: J. Phys. Chem.; (United States), Vol. 86:10
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
08 HYDROGEN
01 COAL, LIGNITE, AND PEAT
ALUMINIUM OXIDES
CATALYTIC EFFECTS
SORPTIVE PROPERTIES
PYRIDINES
CHEMISORPTION
INFRARED SPECTRA
PHOTOACOUSTIC SPECTROSCOPY
VIBRATIONAL STATES
SILICON COMPLEXES
ADSORPTION
EXPERIMENTAL DATA
HIGH TEMPERATURE
PRESSURE COEFFICIENT
ALUMINIUM COMPOUNDS
AZINES
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DATA
ENERGY LEVELS
EXCITED STATES
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTIVITY COEFFICIENTS
SEPARATION PROCESSES
SORPTION
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
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080201 - Hydrogen- Chemisorption Storage
010406 - Coal & Coal Products- Pyrolysis & Cracking- (-1987)