Sorption and diffusion of C8 aromatic hydrocarbons in faujasite type zeolites. II. Sorption kinetics and intracrystalline diffusivities

Goddard, Murray J.; Ruthven, Douglas M.

doi:10.1016/0144-2449(86)90082-5

Cited by 61 publications

(35 citation statements)

References 9 publications

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“…D D dR-np[l s dR-nc (7) and cross- (8) whence it may be seen, by comparison with eqn. 6, that if the cross-coefficient term can be neglected, D ~ D • External Film Resistance Transport rates through the external laminar film are generally correlated using a standard linear rate expression: J = k f (c -c*) (9) in which the mass transfer coefficient is a function of the hydrodynamic conditions.…”

Section: Diffusion Coefficients and Diffusive Transportmentioning

confidence: 92%

Adsorption Kinetics

Ruthven

1989

Adsorption: Science and Technology

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Section: Diffusion Coefficients and Diffusive Transportmentioning

confidence: 92%

Adsorption Kinetics

Ruthven

1989

Adsorption: Science and Technology

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“…Adsorption processes are operated using Simulated Moving Bed technology (SMB), which allows a continuous separation, using zeolites exchanged with cations such as Na + , K + , Ba 2+ [2,[4][5][6][7][8][9][10][11]. This process is being studied and simulated in order to provide tools for process understanding, operations and optimization [3,9,[12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Modeling adsorption equilibria of xylene isomers in a microporous metal–organic framework

Bárcia

Nicolau

Gallegos

et al. 2012

Microporous and Mesoporous Materials

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a b s t r a c tSingle and multicomponent adsorption equilibria of xylene isomers: o-xylene (o-x), m-xylene (m-x), pxylene (p-x) and ethylbenzene (eb) was investigated on the three dimensional microporous metal-organic framework Zn(BDC)(Dabco) 0.5 (BDC = 1,4-benzenedicarboxylate, Dabco = 1,4-diazabicyclo[2.2.2]-octane), MOF 1, in the range of temperatures between 398 and 448 K and partial pressures up to 0.1 bar. The equilibrium data show that a significant amount (around 34 g/100g ads at 398 K) of xylene isomers can be adsorbed in MOF 1. The affinity to the adsorbent measured by the Henry's constants to decreases in the order o-x > m-x > eb > p-x for all temperatures. The zero coverage adsorption enthalpies are all similar and range from 77.4 (eb) to 79.8 kJ/mol (o-x). The Dual-Site Langmuir model (DSL) was used for the interpretation and correlation of the experimental data. The parameters obtained from the pure component isotherms fitting were also used to predict the multicomponent equilibrium data by an extended DSL model. A good agreement was obtained between the predictions and the experimental data. It was also demonstrated that the DSL model is also capable to explain the increase in the isosteric heat of sorption with increasing coverage.

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“…The composition of the mixture at different time intervals was determined using a gas chromatograph (Agilent Technologies 6890 N) with a FID detector and a DB-WAX capillary column (60 m) with high purity helium as a carrier gas. The error in GC analysis was within ± 0.5% (Bellat et al, 1997;Goddard et al, 1986;Kaushik et al, 2002).…”

Section: Adsorption Isotherm Proceduresmentioning

confidence: 82%

Separation and effect of residual moisture in liquid phase adsorption of xylene on y zeolites

Lahot

Rani

Maken

2014

Braz. J. Chem. Eng.

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-The separation of p-xylene and m-xylene from C8 aromatic hydrocarbon feed using Y zeolites is investigated. Effect of residual moisture on p-xylene adsorption on BaY was measured in order to optimize the activation temperature of the adsorbent. The results show that with an increase in temperature the moisture on the adsorbent decreases. An optimum loading of moisture is required for adsorption of xylene on the adsorbents. The Everett equation is used to determine the adsorption capacity and selectivity. It has been found that the adsorbents best suited for the separation of p-xylene, m-xylene, o-xylene and ethyl benzene from the mixture of C8 aromatics are NaY, NaY, BaY and KY, respectively. The XRD results show that the crystallinity of the adsorbent decreases upon exchanging the zeolites to K + and Ba 2+ ions.

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Sorption and diffusion of C8 aromatic hydrocarbons in faujasite type zeolites. II. Sorption kinetics and intracrystalline diffusivities

Cited by 61 publications

References 9 publications

Adsorption Kinetics

Adsorption Kinetics

Modeling adsorption equilibria of xylene isomers in a microporous metal–organic framework

Separation and effect of residual moisture in liquid phase adsorption of xylene on y zeolites

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