(395ai) Effect of Water Vapor On the Colum of a Pressure Swing Adsorption On Solvent Recovery ?Process Simulation and MRI Analysis?

Authors: 
Kato, T., Meiji University
Chihara, K., Meiji University
Kawahara, K., Meiji University
Kobayashi, J., Meiji University



Organic
solvent discharged from the plant adversely affect the human body and the
environment. Therefore, collection
and removal is an essential operation in
chemical engineering process. We investigated the effect when water vapor contained
in the feed gas in the solvent recovery in the PSA process. We also analyzed
the columns by MRI when the experiment was terminated
at a certain time to investigate the adsorption distribution in the column. Respect to experimental results, create a STOP & GO simulations,
we examined the reproducibility of the experimental results.

The experiments were carried
out using the experimental
apparatus of two-column PSA  such as Fig.1, Which was operated by using a programmable controller, set the cycle time purge
step (20 seconds) and pressurisation (160
seconds) and pressure reduction (20
seconds) and desorption step (160
seconds) , the organic solvent concentration at
a constant cycle which was measured by gas chromatography. It also analyzed
by MRI device the experiment was terminated at a constant
cycle in, to
obtain an adsorption distribution.

It
is a calculation method to do the following with STOP & GO method (Fig. 2) . To think in the N cells the column, making the batch
adsorption Stop the flow at a certain time. And I move to the next cell. It
repeated this operation. It used three expressions of the material balance equation, equilibrium adsorption, adsorption rate
expression to. Performs
the simulation calculations, it is compared with the measured values.

             

Fig. 1
Stripping reflux PSA unit             Fig. 2 Stop & Go method
basic concept

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