Modeling of desorption at supercritical conditions

Tan, Chung‐Sung; Liou, D. W.

doi:10.1002/aic.690350616

Cited by 98 publications

(82 citation statements)

References 6 publications

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“…This model successfully estimated the amount of carbon dioxide needed to achieve the required extraction, but could not simulate the shape of the desorption profiles accurately. Tan and Liou (1989b) investigated the desorption of ethyl acetate from carbon and proposed a single parameter model assuming linear desorption kinetics to interpret their regeneration data. Recasens et al (1989) modeled the data of Tan and Liou (1989b) by two different parameter models: (1) an equilibrium model where the rate of desorption is controlled by external and intraparticle mass transfer; (2) a kinetic model where the external and intraparticle mass transfer and a first-order irreversible desorption step control the overall process.…”

Section: Introductionmentioning

confidence: 99%

“…Tan and Liou (1989b) investigated the desorption of ethyl acetate from carbon and proposed a single parameter model assuming linear desorption kinetics to interpret their regeneration data. Recasens et al (1989) modeled the data of Tan and Liou (1989b) by two different parameter models: (1) an equilibrium model where the rate of desorption is controlled by external and intraparticle mass transfer; (2) a kinetic model where the external and intraparticle mass transfer and a first-order irreversible desorption step control the overall process. Later, Srinivasan et al (1990) studied the desorption characteristics of the same system as a function of pressure, temperature, flow rate, and particle size.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of supercritical extraction of organics from solid matrices

et al. 1994

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The desorption profiles of various organics from soil and activated carbon using dense liquid and supercritical carbon dioxide were modeled. The model accounts for effective diffusion of the organics in the solidpores, axial dispersion in the fluid phase, and external mass transfer to the fluid phase from the particle surface. This model, involving partial differential equations, is solved using the orthogonal collocation on finite elements. The model is able to predict the experimental data quite well without any adjustable parameters. The importance of each parameter depended on the system, although adsorption equilibrium and the effective pore diffusion of the organic were the most significant parameters in all the systems investigated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of supercritical extraction of organics from solid matrices

et al. 1994

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“…Previous studies undertaken by Tan and Liou (1990) indicated that this was indeed the case, with the isotherms exhibiting a slight decrease in loading as the temperature increased.…”

Section: Applications Of Liquid Subcritical and Supercritical Co 2 Amentioning

confidence: 75%

“…Both equations described the general shape of the experimental data quite well, but the Freundlich isotherm provided a superior fit. Previous supercritical adsorption studies have found that both the Langmuir (Tan and Liou 1990) and the Freundlich (Madras et al 1993) isotherm models were capable of describing the supercritical adsorption results. Kander and Paulaitis (1983) and Tomasko et al (1993) have applied the Toth isotherm for the description of the loadings of phenol and 2-chlorophenol, respectively, adsorbed from supercritical CO 2 on to activated carbons.…”

Section: Applications Of Liquid Subcritical and Supercritical Co 2 Amentioning

confidence: 99%

Regeneration of Adsorbents by the Use of Liquid, Subcritical and Supercritical Carbon Dioxide

Grajek

2000

Adsorption Science & Technology

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ABSTRACT:The literature concerning the adsorption and desorption of environmental impurities from adsorbents by means of liquid, subcritical and supercritical carbon dioxide and the author's work on the subject have been reviewed. The influence of the adsorption and desorption temperature, the pressure and the density of the extraction solvent, the solubility of the adsorbate in the extraction solvent, the activation energy for adsorbate desorption and the particle size of the adsorbent on the adsorbate desorption efficiency by this method were discussed.

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“…The results of modeling of supercritical CO 2 extraction using desorption model proposed by Tan and Liou (1989) are shown in Table 2 and 3. The increase in the desorption coefficient k d with increasing pressure and temperature of extraction is noticed (Table 3).…”

Section: Discussionmentioning

confidence: 99%

Modelling the supercritical CO2 extraction kinetics of soybean oil

Jokić

Svilović

Vidović

2015

Croat. J. Food Sci. Technol.

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SummaryDifferent empirical models were used to describe the supercritical CO 2 extraction of soybean oil obtained at series of operational parameters namely pressure, temperature, solvent flow rate and characteristic particle size. Process yields obtained by supercritical CO 2 were up to 19.33%. Several kinetic models: Brunner, Kandiah and Spiro, Tan and Liou, Martinez et al. and Esquivel et al. were used to test the experimental yield data. All models were analysed using nonlinear regression method. Also a new model, modified Esquivel et al., was proposed and analysed using nonlinear regression method as well. According to the obtained results for extraction yield of soybean oil, the modified Esquivel et al. model show the best agreement between experimental and model calculated data.

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Modeling of desorption at supercritical conditions

Cited by 98 publications

References 6 publications

Modeling of supercritical extraction of organics from solid matrices

Modeling of supercritical extraction of organics from solid matrices

Regeneration of Adsorbents by the Use of Liquid, Subcritical and Supercritical Carbon Dioxide

Modelling the supercritical CO2 extraction kinetics of soybean oil

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