ISSN:
1573-4846
Keywords:
texture
;
silica gels
;
silica-alumina gels
;
catalyst
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The porous texture of silica and silica-alumina hydrogels has been studied by means of thermoporometry measurements. The texture of the xerogels resulting from spray-drying of silica-alumina hydrogels is then evaluated by different methods: BET, Hg-porosimetry and thermoporometry. As each method is based on different physical principles and assumptions, differences are observed between the results. However, these results are complementary and their comparison leads to a better knowledge of the texture of the catalyst particles. A good agreement is observed between thermoporometry and nitrogen adsorption-desorption measurements, whereas mercury porosimetry results are very different. Silica-alumina gels appear as mainly mesoporous materials.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02436839
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