FT-IR STUDY OF THE INTERACTION OF MAGNESIUM FERRITE WITH SO2

Citation
E. Astorino et al., FT-IR STUDY OF THE INTERACTION OF MAGNESIUM FERRITE WITH SO2, Catalysis letters, 23(3-4), 1994, pp. 353-360
Citations number
18
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
1011372X
Volume
23
Issue
3-4
Year of publication
1994
Pages
353 - 360
Database
ISI
SICI code
1011-372X(1994)23:3-4<353:FSOTIO>2.0.ZU;2-T
Abstract
The interaction Of SO2 With the inverted spinel MgFe2O4 in the presenc e and in the absence of oxygen has been studied by FT-IR spectroscopy in the temperature range 300-773 K. SO2 adsorbs in the form of sulfito complexes that transform to sulfato complexes both in the presence an d in the absence of oxygen. Evidence is found for a catalytic effect o f the ferric oxide component in the oxi dation Of SO2. Sulfate species are stable up to 773 K. Pyridine adsorption experiments show that sul fated magnesium ferrite is a Lewis acidic solid and does not present B ronsted acidity.