Change in the linear dimensions of the granules of synthetic zeolites during the adsorption of water vapor

Kononyuk, V. F.; Sarakhov, A. I.; Dubinin, M. M.

doi:10.1007/bf00851169

Cited by 7 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At 2.3 mmole/g, it passed through a max. corresponding to a block of all the entry windows into the larger cavities by adsorbed water (Kononyuk et al 1972). NMR studies revealed the presence of strong and weak adsorbent-adsorbate interaction (Deininger et al 1969).…”

Section: Introductionmentioning

confidence: 97%

Water isotherm models for 4A (NaA) zeolite

Loughlin

2009

Adsorption

View full text Add to dashboard Cite

The adsorption data of Gorbach et al. (Adsorption 10(1): 29-46, 2004) and Morris (J. Colloid Interface Sci. 28: 149-155, 1968) for the adsorption of water on 4A zeolite pellets is re-analyzed. Model isotherms are derived considering a two site hypothesis, one for the α cage and one for the β cage. Four simple model isotherms are fitted to the data. Both a dual site Toth or dual site Langmuir isotherm model fit the data adequately.The optimized standard enthalpy and entropy of adsorption parameters derived from the data are surprising for the β cage. The optimized standard enthalpy of the β cage is 1/3rd of that observed calorimetrically, and the standard entropy of adsorption is positive, a physical impossibility. Substituting the calorimetric enthalpy of adsorption corrected the standard differential entropy of sorption values resulting in the standard entropy of sorption values varying significantly with temperature. This variation is postulated to be due to either water of hydration formation, or clathrate formation, or the formation of clusters of water such as dimers, trimers, etc.Keywords Adsorption · Water · 4A (NaA) zeolite · Langmuir isotherm · Toth isotherm · Ruthven isotherm · Dual site isotherm · Standard enthalpy of adsorption · Standard entropy of adsorption Nomenclature f i fractional size of site i K ci dimensionless equilibrium constant ci, cβ for cage β and cα for cage α respectively

show abstract

Section: Introductionmentioning

confidence: 97%

Water isotherm models for 4A (NaA) zeolite

Loughlin

2009

Adsorption

View full text Add to dashboard Cite

show abstract

“…Most works devoted to experimental studies [2][3][4][5] and description [6][7][8] of adsorption induced deforma tions have been performed on microporous adsorbents with a narrow pore size distribution with the purpose of finding general relationships concerning changes in the adsorption deformation that relate specifically to micropores.…”

Section: Introductionmentioning

confidence: 99%

Adsorption deformation of a microporous AR-V carbon adsorbent during the adsorption of benzene

Nabiulin

Фомкин

Tvardovskii

2012

Prot Met Phys Chem Surf

View full text Add to dashboard Cite

Adsorption isotherms of benzene and adsorption induced deformation of the AR V microporous carbon adsorbent in the pressure range from 1 Pa to 14 kPa and at temperatures from 255 to 353 K have been determined. Contraction of the AR V adsorbent is observed at temperatures of 333 and 353 K in the low pressure area, which changes into expansion with an increase in pressure. In a low temperature area (255-313 K), only expansion of the AR V adsorbent is observed in the whole range of the studied pressures. The value of the maximal relative compression of the adsorbent changes from 0.18 to 0.08%, while the corre sponding temperature varies from 353 to 333 K. The maximal relative expansion changes from 0.9 to 0.05% along with an increase in the corresponding temperature from 293 to 353 K.

show abstract

“…The first experimental investigations of adsorption deformation of active car bons under vapor adsorption [6,7] showed that its magnitude was not large and did not exceed several tenths of a percent. Further investigations of adsorp tion deformation were carried out in such works as [8]. The peculiarities of adsorption deformation isotherms for NaX zeolite during water vapor adsorption versus the filling of adsorption space-"expansion-contrac tion-expansion"-may be connected with noninert energetic effects that are specific to porous structures.…”

Section: Introductionmentioning

confidence: 99%

Wave sorbostriction of AP-B recuperated carbon adsorbent during adsorption of vapors of organic substances

Nabiulin

Фомкин

Школин

et al. 2015

Prot Met Phys Chem Surf

View full text Add to dashboard Cite

Data on variation of linear sizes of AP B adsorbent granules under physical adsorption of ben zene, n hexane, n nonane, tetrachloride carbon, and mixtures thereof within the temperature range of from 423 to 473 K were presented for equilibrium and nonequilibrium conditions. It was shown that waves of adsorption deformation of adsorbents-waves of sorbostriction-appeared at a certain selection of adsorp tion parameters.

show abstract

Change in the linear dimensions of the granules of synthetic zeolites during the adsorption of water vapor

Cited by 7 publications

References 7 publications

Water isotherm models for 4A (NaA) zeolite

Water isotherm models for 4A (NaA) zeolite

Adsorption deformation of a microporous AR-V carbon adsorbent during the adsorption of benzene

Wave sorbostriction of AP-B recuperated carbon adsorbent during adsorption of vapors of organic substances

Contact Info

Product

Resources

About