A study of pyridine adsorbed on silica-alumina catalysts by combined infrared spectroscopy and temperature-programmed desorption
Journal Article
·
· J. Catal.; (United States)
Study with mass spectroscopic analysis of the desorbed pyridine showed that desorption from the Lewis sites of 10 3< silica/alumina and 50 3< silica/alumina gels had first-order kinetics and activation energies of 8.4 and 6.0 kcal/mole, respectively, and that the desorption from Lewis and Broensted sites of 90Vertical Bar3< silica/alumina gel had first-order kinetics and activation energies of 5.3 kcal/mole for Lewis and 7.2 kcal/mole for Broensted sites. The temperatures of maximum desorption flux and of maximum change in surface concentration did not coincide. Possible causes for the unexpectedly low activation energies of desorption are discussed in terms of the mechanism of transport of pyridine from acid sites to the gas phase. The experimental apparatus and technique are outlined.
- Research Organization:
- Chevron Res. Co.
- OSTI ID:
- 6922511
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 54:3; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Adsorption of atomic hydrogen on alumina by hydrogen spillover
Fourier transform infrared photoacoustic spectroscopy of pyridine adsorbed on silica-alumina and. gamma. -alumina
Investigation of the distribution of acidity in zeolites by temperature-programmed desorption of probe molecules. 1. Dealuminated mordenites
Journal Article
·
Sat Jun 30 00:00:00 EDT 1979
· J. Catal.; (United States)
·
OSTI ID:7141319
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)
·
OSTI ID:6577347
Investigation of the distribution of acidity in zeolites by temperature-programmed desorption of probe molecules. 1. Dealuminated mordenites
Journal Article
·
Wed Jan 24 23:00:00 EST 1990
· Journal of Physical Chemistry; (USA)
·
OSTI ID:6879867
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AZINES
BENCH-SCALE EXPERIMENTS
CATALYSTS
CHALCOGENIDES
DESORPTION
DOCUMENT TYPES
ENERGY
HETEROCYCLIC COMPOUNDS
INFRARED SPECTRA
KINETICS
MASS SPECTROSCOPY
MINERALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PYRIDINE
PYRIDINES
REACTION KINETICS
REVIEWS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TEMPERATURE EFFECTS
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AZINES
BENCH-SCALE EXPERIMENTS
CATALYSTS
CHALCOGENIDES
DESORPTION
DOCUMENT TYPES
ENERGY
HETEROCYCLIC COMPOUNDS
INFRARED SPECTRA
KINETICS
MASS SPECTROSCOPY
MINERALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PYRIDINE
PYRIDINES
REACTION KINETICS
REVIEWS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TEMPERATURE EFFECTS