Open AccessSurface and Catalytic Properties of SnO2–Cr2O3 Catalysts
Author(s) -
E.A. El-Sharkawy,
Mohsen M. Mostafa,
A.M. Youssef
Publication year - 1997
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749701500307
Subject(s) - catalysis , calcination , chromia , chemistry , dehydrogenation , spinel , cyclohexane , inorganic chemistry , adsorption , chemical composition , oxide , magnetic moment , analytical chemistry (journal) , materials science , metallurgy , organic chemistry , physics , condensed matter physics
Co-precipitated SnO 2 –Cr 2 O 3 catalysts of different chemical composition were prepared. The textural properties were determined from the low-temperature nitrogen adsorption isotherms while the structural properties were determined using FT-IR spectroscopic techniques. The magnetic moments of the catalysts were measured by the Gouy method. Catalytic conversion of 2-propanol, 1-butanol and the dehydrogenation of cyclohexane were followed using the pulse microcatalytic technique. No spinel structure was detected, even upon calcination at temperatures as high as 973 K. Only Cr 2 O 3 was detected for samples containing ≥15 mol% chromia. The chemical composition and calcination temperatures are important factors in determining the textural properties of mixed oxide catalysts. The catalytic activity depends on the effective magnetic moment and surface acidity.