scholarly journals WATER VAPOR ADSORPTION ISOTHERM MODEL OF PORTLAND CEMENT PASTE

2011 ◽  
Vol 76 (664) ◽  
pp. 1033-1041 ◽  
Author(s):  
Ippei MARUYAMA ◽  
Go IGARASHI
Keyword(s):  
Water Vapor ◽  
Adsorption Isotherm ◽  
Portland Cement ◽  
Cement Paste ◽  
Water Vapor Adsorption ◽  
Isotherm Model ◽  
Vapor Adsorption ◽  
Portland Cement Paste

Pore structure analysis by water vapor adsorption. IV. Analysis of hydrated portland cement pastes of low porosity

1972 ◽  
Vol 38 (1) ◽  
pp. 265-276 ◽  
Author(s):  
Ivan Odler ◽  
Julius Hagymassy ◽  
Marvin Yudenfreund ◽  
Kaissar M Hanna ◽  
Stephen Brunauer
Keyword(s):  
Water Vapor ◽  
Portland Cement ◽  
Pore Structure ◽  
Structure Analysis ◽  
Water Vapor Adsorption ◽  
Cement Pastes ◽  
Vapor Adsorption ◽  
Low Porosity ◽  
Pore Structure Analysis

Adsorption Isotherm and Kinetics of Water Vapor Adsorption Using Novel Super-Porous Hydrogel Composites

2020 ◽  
Author(s):  
Hemant Mittal ◽  
Ali Al-Alili ◽  
Saeed M. Alhassan
Keyword(s):  
Water Vapor ◽  
Adsorption Isotherm ◽  
Adsorption Capacity ◽  
Polymer Matrix ◽  
Adsorbed Water ◽  
Water Vapor Adsorption ◽  
Water Molecules ◽  
Vapor Adsorption ◽  
Highly Effective ◽  
Desiccant Material

Abstract Deliquescent salts have high water vapor adsorption capacity, but they dissolve in water by forming crystalline hydrates. That restricts their use in different water vapor adsorption applications. However, this limitation can be overcome by incorporating deliquescent salts within a polymer matrix which will keep the salt solution in place. Furthermore, if the polymer matrix used is also capable of adsorbing water vapor, it will further improve the overall performance of desiccant system. Therefore, in this work, we are proposing the synthesis and use of a highly effective new solid polymer desiccant material, i.e. superporous hydrogel (SPHs) of poly(sodium acrylate-co-acrylic acid (P(SA-co-AA)), and subsequently its composite with deliquescent salt, i.e. calcium chloride (CaCl2), to adsorb water vapors from humid air without the dissolution of the salt in the adsorbed water. Parental PAA-SPHs matrix alone exhibited an adsorption capacity of 1.02 gw/gads which increased to 3.35 gw/gads after incorporating CaCl2 salt in the polymer matrix. Both materials exhibited type-III adsorption isotherm and the experimental isotherm data fitted to the Guggenheim, Anderson and Boer (GAB) isotherm model. However, the adsorption kinetics followed linear driving force model which suggested that this extremely high adsorption capacity was due to the diffusion of water molecules into the interconnected pores of SPHs via capillary channels followed by the attachment of adsorbed water molecules to the CaCl2 salt present in the polymer matrix. Furthermore, the adsorbents were used successively for six cycles of adsorption with a very little loss in adsorption capacity. Therefore, the proposed polymer desiccant material overcomes the problem of dissolution of deliquescent salts and opens the doors for a new class of highly effective solid desiccant material.

scholarly journals Prediction of storage conditions of dehydrated foods from a water vapor adsorption isotherm

2017 ◽  
Vol 16 (1) ◽  
pp. 207-220 ◽  
Author(s):  
L.A. Pascual-Pineda ◽  
◽  
L. Alamilla-Beltrán ◽  
G.F. Gutiérrez-López ◽  
E. Azuara ◽  
...  
Keyword(s):  
Water Vapor ◽  
Adsorption Isotherm ◽  
Storage Conditions ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption

Water vapor adsorption isotherm expressions based on capillary condensation

2013 ◽  
Vol 116 ◽  
pp. 95-100 ◽  
Author(s):  
Xiang Jun Liu ◽  
Yun Fei Shi ◽  
Mohammad Ali Kalbassi ◽  
Richard Underwood ◽  
Ying Shu Liu
Keyword(s):  
Water Vapor ◽  
Adsorption Isotherm ◽  
Capillary Condensation ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption

Water vapor adsorption by activated carbon: a modification to the isotherm model of Do and Do

Carbon ◽  
2001 ◽  
Vol 39 (9) ◽  
pp. 1437-1438 ◽  
Author(s):  
Marcel Neitsch ◽  
Wolfgang Heschel ◽  
Matthias Suckow
Keyword(s):  
Activated Carbon ◽  
Water Vapor ◽  
Water Vapor Adsorption ◽  
Isotherm Model ◽  
Vapor Adsorption
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