A New Analytical Isotherm Equation for Adsorption on Heterogeneous Adsorbents

Hines, Anthony L.; Kuo, Shing Lia; Dural, Nilufer H.

doi:10.1080/01496399008050371

Cited by 17 publications

(12 citation statements)

References 12 publications

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“…The results are compared in Table 3. Hines et al (9) developed an isotherm considering the heterogeneity of the surface. In developing the isotherm, Hines et al assumed that the surface consisted of energetically heterogeneous sites and that the distribution of such sites could be described by a probability density function.…”

Section: Although the Bet Equation Was Developed Based On The Assumptmentioning

confidence: 99%

“…A comparison of the Langmuir, BET, Freundlich, and Hines et al (9) models is given in Table 3 for all the experimental runs. The average absolute percent error, maximum positive error, and maximum negative error over the complete pressure range are given in the table.…”

Section: Although the Bet Equation Was Developed Based On The Assumptmentioning

confidence: 99%

“…Thus a plot of the volume adsorbed versus the adsorption potential should produce a single characteristic curve independent of temperature as shown in Figs. 5-7. The equilibrium data were next correlated by the Langmuir, the BET, and the Freundlich equations, in addition to a new isotherm proposed by Hines et al (9) for heterogeneous surfaces.…”

Section: Data Correlationmentioning

confidence: 99%

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Adsorption of Acetaldehyde, Propionaldehyde, and Butyraldehyde on Silica Gel

Ghosh

Hines

1990

Separation Science and Technology

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Adsorption isotherms of acetaldehyde, propionaldehyde, and butyraldehyde on Davison silica gel were determined gravimetrically at three temperatures. The isoteric heat of adsorption initially increased at low loading and then decreased monotonically with an increase in loading. The equilibrium adsorption data were successfully correlated by Polanyi's potential theory. The equilibrium data were also correlated with the Langmuir, BET, Freundlich, and the Hines et al. models. The Freundlich and the Hines et al. models provided the best fit to the data, while the BET equation was found to be applicable only for a relative pressure range of 0.05 to 0.2. The monolayer surface coverages of silica gel by all of the aldehydes estimated by the Langmuir equation were found to be consistently higher than those calculated from the BET equation, except for acetaldehyde at 306.5 K.

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Section: Although the Bet Equation Was Developed Based On The Assumptmentioning

confidence: 99%

Section: Although the Bet Equation Was Developed Based On The Assumptmentioning

confidence: 99%

Section: Data Correlationmentioning

confidence: 99%

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Adsorption of Acetaldehyde, Propionaldehyde, and Butyraldehyde on Silica Gel

Ghosh

Hines

1990

Separation Science and Technology

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“…Two important overall equations are the Tóth (5) and the Recently, Hines et al (11) developed an overall adsorp-UNILAN (10) models. For correlation purposes, we have tion isotherm model in which the local isotherm is given by used in this work the equation of the Tóth model (5) as the Jovanovic equation (Eq.…”

Section: Theorymentioning

confidence: 99%

“…A last approach involves the assumption of a local and an overall isotherm model (3). It is also arbitrary, as therm models previously reported (5,10,11).…”

Section: Introductionmentioning

confidence: 99%