HYDROTHERMAL MODIFICATION OF SILICA-GELS (XEROGELS) .2. EFFECT OF THEDURATION OF TREATMENT ON THEIR POROUS STRUCTURE

Authors
LEBODA R MENDYK E GIERAK A TERTYKH VA
Citation
R. Leboda et al., HYDROTHERMAL MODIFICATION OF SILICA-GELS (XEROGELS) .2. EFFECT OF THEDURATION OF TREATMENT ON THEIR POROUS STRUCTURE, Colloids and surfaces. A, Physicochemical and engineering aspects, 105(2-3), 1995, pp. 191-197
Citations number
13
Categorie Soggetti
Chemistry Physical
Journal title
Colloids and surfaces. A, Physicochemical and engineering aspects → ACNP
ISSN journal
09277757
Volume
105
Issue
2-3
Year of publication
1995
Pages
191 - 197
Database
ISI
SICI code
0927-7757(1995)105:2-3<191:HMOS(.>2.0.ZU;2-J
Abstract
The effect of the duration of hydrothermal treatment (in the range 1-2 0 h) on the parameters of the pore structure of silica xerogels was in vestigated. Silica gels with different initial porous structure parame ters were used. The specific surface area (S) of the adsorbents change d from 830 to 38 m(2) g(-1). A simple mathematical equation describing the dependence of the specific surface area S on the autoclaving trea tment time is proposed. The main changes in the geometrical structure of silica gel occur during the first 6 h of treatment. A long-term (ov er 6 h) hydrothermal treatment can be recommended to improve the homog eneity of the pore structure of silica gels.