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همایش بین المللی ژئولیت ایران

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۹ صفحه

This article is presented an experimental and modeling study of a four–bed pressure swing adsorption
process using zeolite13X to provide oxygen–enriched air. The binary mixture N2\O2 (79\21 vol %) was used
as a feed stream. The effects of purge\feed ratio (P\F), adsorption pressure, adsorption time and product flow
rate on product purity under nonisothermal condition were studied. The higher the P\F ratio, the faster
decreasing the purity during long adsorption times. In a constant pressure, for long adsorption times the
purity is decreasing significantly in high P\F ratios (0.18≤ P\F ≤ 0.24). In a constant P\F ratio and pressure,
increasing the product flow rate causes gentle decreasing of purity. Pressure changes have not significant
effect on purity. In cycle time 140 S, P\F ratio = 0.18, pressure = 4 bar, product flow rate = 0.4 lit\min, the
purity of 96.22% is achieved. In this study, the sorption rate into an adsorbent pellet is described by the liner
driving force (LDF) model with a single lumped mass–transfer parameter. A mathlab code using finite
difference method was developed to solve the set of coupled differential–algebraic equations, and the
simulation results are agreed well with experimental results.<\div>

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