Can the process of using nitrogen purging to remove impurities be simulated with Aspen?
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RT: The product at the top of the distillation column in the plant does not meet the required standards. Currently, nitrogen is blown into the column’s top to remove impurities and thus make the product meet the standards. Can this process be simulated using Aspen? What is the simulation approach? If it is simulated, it would also be desirable to conduct a quantitative analysis. I’m asking for help from experts!
I personally think it is possible to simulate it. It involves using nitrogen to blow away the low-boiling light components in the liquid-phase product. The basis is the principle of gas-liquid equilibrium. However, it will also blow away some of the target products, and once they are blown away, it is difficult to recover them. Therefore, it remains to be analyzed whether the use of nitrogen is optimal.
Reply 1# cuiky: In HYSYS, there are no issues with dynamic simulation.
We also have a similar process that uses air to blow away the low-boiling substances (water) in the liquid product. It can be simulated using the RateFrac unit module based on rate models in Aspen, and the results are quite good