Hydration rate of allophane and imogolite by hydration heat measurement - Using as heat exchange absorbents for lower temperature heat source and speedy drying desiccant

Citation
M. Suzuki et al., Hydration rate of allophane and imogolite by hydration heat measurement - Using as heat exchange absorbents for lower temperature heat source and speedy drying desiccant, J CERAM S J, 109(10), 2001, pp. 874-881
Citations number
18
Language
GIAPPONESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
ISSN journal
0914-5400 → ACNP
Volume
109
Issue
10
Year of publication
2001
Pages
874 - 881
Database
ISI
SICI code
0914-5400(200110)109:10<874:HROAAI>2.0.ZU;2-C
Abstract
The hydration rate of allophane and imogolite has been estimated by means o f an adiabatic vapor absorption calorimeter. The hydration amount of alloph ane and imogolite were 16.6 and 19.4%, respectively, at dehydrated temperat ure of 100 degreesC. The maximum hydration rate of allophane and imogolite were 0.063 mmol/g(.)s and 0.087 mmol/g(.)s, respectively, at same dehydrati on temperature. When allophane and imogolite were dehydrated at temperature s below 100 degreesC, the hydration rate of allophane was larger than that of Mg-A type zeolite, and the hydration amount of allophane was larger than that of B type silica gel. Both hydration rate and hydration amount of imo golite were larger than those of Mg-A type zeolite and B type silica gel. T herefore, allophane and imogolite are suitable for heat exchange absorbents of the heat pump and speedy drying desiccant.