سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۹

نویسنده(ها):

zahra Moghadaszadeh – Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran
jafar towfighi – Chemical Engineering Department, Persian Gulf University, Bushehr, Iran
masoud mofarahi –

چکیده:

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 ≤ ۰٫۲۴). 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.