The conversion of methanol : a probe reaction for hydroxyapatite

Stoichiometric and nonstoichiometric hydroxyapatites are characterized by surface area, ICP, XPS and NMR MAS. The dehydration of methanol is shown to be unimolecular but poisoned by both alcohol and water. Rate constants and the ratio of the adsorption equilibrium constants of alcohol and water are...

Full description

Saved in:
Bibliographic Details
Published in:Catalysis letters 2001-09, Vol.76 (1-2), p.75-80
Main Authors: SUGIYAMA, S, MOFFAT, J. B
Format: Article
Language:English
Subjects:
Alcohol
Catalysis
Catalysts: preparations and properties
Chemical equilibrium
Chemistry
Dehydration
Deuteration
Exact sciences and technology
General and physical chemistry
Hydroxyapatite
Methanol
NMR
Nuclear magnetic resonance
Rate constants
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
X ray photoelectron spectroscopy
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Stoichiometric and nonstoichiometric hydroxyapatites are characterized by surface area, ICP, XPS and NMR MAS. The dehydration of methanol is shown to be unimolecular but poisoned by both alcohol and water. Rate constants and the ratio of the adsorption equilibrium constants of alcohol and water are obtained with the former appearing to be related to the surface Ca/P values. Infrared spectroscopy and temperature-programmed desorption and reaction show that hydroxyapatite, after exposure to methanol, contains surface methoxy groups and related experiments with deuterated methanol show that the dehydration process involves the interaction of methanol with surface protium.
ISSN:1011-372X
1572-879X
DOI:10.1023/A:1016736309421