Investigation of Manganese Dioxide as an Improved Solid Desiccant
ANL (Series)
Argonne National Laboratory Report ANL-83-22
Argonne National Laboratory Reports
Fraioli, Anthony V.
Argonne National Laboratory
Argonne National Laboratory
1983-03
English
This report describes the preparation of a series of manganese oxides and an analysis of their sorptive, structural, and surface characteristics as low-energetic desiccants for passive dehumidification and active desiccant cooling systems. A cusped Type III isotherm for the adsorption of water is reported for the first time. The data are interpreted as evidence of a first-order phase change from a two-dimensional gas to a liquid film in the first reversibly adsorbed layer. It appears that the water adsorption characteristics of MnO2 compared to standard desiccants which exhibit Type II isotherms are due at least in part to differences in the physical topography and electronic properties of the desiccant substrates: MnO2 is a p-type semiconductor with essentially-flat, monoenergetic surface structures, while standard desiccants like silica gel are electronic insulators with irregular, heteroenergetic surfaces.
Solar air conditioning.
Manganese oxides.
Water -- Absorption.
Semiconductors.
Surfaces (Physics)
Report
v, 25 p. : charts
Text
oclc: 881637943
sudoc: E 1.28:ANL-83-22
rep-no: ANL-83-22
grantno: W-31-109-Eng-38
https://digital.library.unt.edu/ark:/67531/metadc283585/
ark: ark:/67531/metadc283585