Pressure-swing adsorption configurations

Operations like pressure swing adsorption involve the condensation of the liquid in the porous medium. Several researchers developed predictive models of the configuration of liquid phase in the wet, unsaturated, porous media. The method developed by Silverstein and Fort (2000) is based on simulated annealing with random swapping of gas and liquid elements in the system to achieve a global energy minimum defined by... 

Pressure Swing Adsorption (PSA) unit is a dynamic separation process. In order to create a precise model of the process and thus an accurate design, it is necessary to have a good knowledge of the mixture s adsorption behaviour. Consequently, the dilAision rates in the adsorbent particles and the mixture isotherms are extremely vital data. This article intends to present a new approach to study the adsorption behaviour of isomer mixtures on zeolites. In a combined simulation and experimental project we set out to assess the sorption properties of a series of zeolites. The simulations are based on the configurational-bias Monte Carlo technique. The sorption data are measured in a volumetric set-up coupled with an online Near Infra-Red (NIR) spectroscopy, to monitor the bulk composition. Single component isotherms of butane and iso-butane were measured to validate the equipment, and transient volumetric up-take experiments were also performed to access the adsorption kinetics. 

Novel Hybrid Membrane Pressure Swing Adsorption Processes Configuration I... 

Most of the flow directions in a pressure-swing process are fixed relative to one another. The most common configuration is for adsorption to take place upflow, thus the name blowdown for counteicunem depressurization. Therefore, some precautions must be taken to assure that no bed lifting or crashing occurs (see below). Pressure-swing stqis are more diflicuh to assess because many steps such as depressurization, blowdown, pressurization, and equalization b in at a high flow rale and decrease to low or no flow. 

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