Exact(6)
They showed that the pressure increasing during pressurization step causes increasing dispersion in the PSA beds and finally results in decrease of product purity and recovery.
A model of this kind has been employed to simulate the separation of a carbon dioxide/methane mixture with silicalite as the adsorbent using a Skarstrom PSA cycle including a pressure equalization step before the pressurization step of each bed.
Pressurization step.
Equalization to pressurization step.
It is shown that the optimal cycle scheme consists of four steps: a no-inflow pre-pressurization step, a pressurization step, a no-inflow post-pressurization step, and a depressurization step.
The PVSA cycle used consists of four steps; an adsorption step, a counter-current blowdown step, a counter-current purge step and, finally, a counter-current pressurization step.
Similar(54)
A general pressure swing adsorption (PSA) cycle, involving pressure equalization, forward depressurization, incomplete purge, product backfill and feed pressurization steps, has been analyzed with an isothermal local equilibrium model assuming linear isotherms.
Above 30 MPa, the amount of creep strain that occurs in 6 h is approximately constant with equal pressurization steps, indicating a linear viscous rheology.
Results are presented to show that there is significant adsorption/desorption during pressure changing steps (pressurization, blowdown), which in turn has significant effect on process performance.
This study presents experimental and simulated data obtained from a bench-scale PSA, with a maximum pressure of 6 bar for pressurization and feed steps and minimum of 1 bar for blowdown and purge steps.
A preliminary study of combinations of the pressurization and feed steps and the feed and blowdown steps has been performed.
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