Figure 2; Effect of pressure on the carbon dioxide absorption at
333 K and at a concentration of 1M piperazine compared to literature
data (Chung et al. 2010).
In Figure 2, the increase in pressure as an optimal parameter for
increasing the absorption in a gas system at any temperature can play a
role. However, at higher pressures, due to increased gas phase velocity
and a decrease in the remaining time, there will be a lower gradient
absorption trend, which will signal the need to select an optimal
pressure for the system. Of course, it should be borne in mind that the
lower the temperature of the system, the greater the absorption at the
same pressure as the rest of the systems. Absorption is a thermosetting
action, so obviously the lower the temperature of the absorption system,
the better the separation will take place.
Figure 3 shows the accuracy of the prediction of the proposed model with
pressure variations at different selective temperatures.
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