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Modeling of Breakthrough Curves for Adsorption of Propane, n-Butane, and Iso-Butane Mixture on 5A Molecular Sieve Zeolite

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Abstract

Breakthrough curves for the adsorption of propane, n-butane, and iso-butane mixture on 5A molecular sieve zeolite were obtained experimentally and theoretically at a constant temperature of 301 K. The equilibrium model and linear driving force model were used to predict the experimental breakthrough curves for this multicomponent mixture. The equilibrium model gave a satisfactory fit for experimental data. The model equations were solved by a numerical method based on backward finite difference with a fixed griding technique. The effects of feed flow rate (0.552–3.496 l/min), feed concentration (60.72–141.68 mmol/l), and adsorbates composition (58.75–75.32%) on these breakthrough curves were examined.

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Abbreviations

C I :

Feed or influent gas phase concentration (mmol/l)

C E :

Product or effluent gas phase concentration (mmol/l)

K i , K ij :

Extended Freundlich equation coefficients

K G :

Mass transfer parameter in linear driving force model (1/min)

n i , n ii , n ij :

Extended Freundlich equation parameters

q :

Adsorbed phase concentration (mmol/g)

u s :

Superficial gas velocity (cm/min)

t :

Time (min)

z :

Axial coordinate (distance from the bed inlet) (cm)

ε o :

Over all bed void fraction

ρ b :

Bed density (g/l)

Δq :

Increment of adsorbed phase concentration (mmol/g)

Δt :

Increment of time

Δz :

Increment of distance

i :

Component i

j :

Component j

n :

Component n

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Correspondence to Muthanna J. Ahmed.

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Ahmed, M.J., Mohammed, A.H.A.K. & Kadhum, A.A.H. Modeling of Breakthrough Curves for Adsorption of Propane, n-Butane, and Iso-Butane Mixture on 5A Molecular Sieve Zeolite. Transp Porous Med 86, 215–228 (2011). https://doi.org/10.1007/s11242-010-9617-5

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  • DOI: https://doi.org/10.1007/s11242-010-9617-5

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