Dynamics of water vapor adsorption on humidity-indicating silica gel
Küçük Resim Yok
Tarih
1998
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Well-defined CoCl2-containing silica gels were prepared by impregnation of the aqueous solution of the salt to silica hydrogel, drying and aging methods. Silica gels having 392-437 m(2) g(-1) surface area and 0.21-0.37 cm(3) g(-1) pore volume and having an average particle size of 3 mm were obtained. Aging in CoCl2 solutions decreased the surface area of silica gels from 540 cm(2) g(-1) to 392-430 m2 g-l and pore volume from 0.27 to 0.21-0.23 cm(3) g(-1) for CoCl2 concentration smaller than 0.28 mol dm(-3) in silica gel. Adsorbed water desorbed from the gels absorbing 1917-2555 i g(-1) energy as determined by differential scanning calorimetry. The CoCl2-containing gels were successfully used in dynamic column experiments, with linear relation between velocities of inlet air and movement of blue to pink boundary. The colour change also makes the detection of the defects in column filling which causes air channelling. (C) 1998 Elsevier Science B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
column dynamics, humidity-indicating, silica gel, cobaltous chloride, water vapor adsorption
Kaynak
Applied Surface Science
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
134
Sayı
01.Apr
