In process simulation, should the reflux ratio for a column be based on molar ratio or mass ratio?
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In process simulation, should the reflux ratio for a column be based on a molar ratio or a mass ratio? In the simulation, a simplified design is carried out first, followed by detailed calculations. Is the reflux ratio obtained from the simplified design a molar ratio or a mass ratio? Which one is generally used? Thank you.
If a total condenser is used at the tower top, both the molar ratio and the mass ratio remain the same, since the reflux ratio = reflux volume / amount taken from the tower top; in Aspen, the molar ratio is commonly used
In the operating specifications, it is possible to choose between using moles or mass; both the reflux ratio and the boilup ratio can be set as desired
As mentioned above, both molar and mass reflux ratios are available. As long as you realize that