B. Amram et al., SURFACE-CHEMISTRY OF TUNGSTATE-TREATED AND CARBONATE-TREATED ALUMINASSTUDIED BY FT-IR SPECTROSCOPY, Mikrochimica acta, 1997, pp. 711-713
The purpose of our work was to study the surface chemistry of tungstat
e- and carbonate-impregnated aluminas by Fourier-transform infrared (F
T-IR) spectroscopy. Direct and pyridine adsorption/desorption investig
ations allowed us to study the influence of the impregnation and of th
e catalytic test on the surface chemistry and acidity. Methanol adsorp
tion/desorption studies allowed us to perform a partial simulation of
the reaction (hydrosulphurization of methanol) and to compare the spec
tra with ex situ examinations of the samples before and after the cata
lytic test.