The properties of a number of commercial aluminas and silica-alumina have been characterized by XRD, TEM, Surface area and porosity analysis, skeletal IR and Raman spectroscopies, IR studies of adsorbed probe molecules (hydroxy groups, pyridine, CO, CO2). The catalytic activity of these materials in the dehydration of ethanol to ethylene and diethylether has been studied in a flow reactor as well as in an IR cell. The catalytic activity data have been discussed in relation to the surface chacarterization data. This allowed us to crytically discuss the most popular models for the surface sites of alumina and silica-alumina.
The acidity of aluminas and silica-aluminas: catalytic activity in the conversion of ethanol
PHUNG, THANH KHOA;LAGAZZO, ALBERTO;BUSCA, GUIDO
2013-01-01
Abstract
The properties of a number of commercial aluminas and silica-alumina have been characterized by XRD, TEM, Surface area and porosity analysis, skeletal IR and Raman spectroscopies, IR studies of adsorbed probe molecules (hydroxy groups, pyridine, CO, CO2). The catalytic activity of these materials in the dehydration of ethanol to ethylene and diethylether has been studied in a flow reactor as well as in an IR cell. The catalytic activity data have been discussed in relation to the surface chacarterization data. This allowed us to crytically discuss the most popular models for the surface sites of alumina and silica-alumina.
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