Propane-propylene separation tower simulation
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As the title suggests, has anyone used ASPEN to simulate a propane-propylene separation column? The problem I’m facing is that the amounts of propylene in the overhead fraction are similar to those of the accompanying components, but the amount of propane is much higher. In other words, the content of light components in the overhead fraction (in moles) is roughly within the desired range, while there’s a significant excess of heavier components. How should this tower be adjusted? Thank you!
This is described in detail in Teacher Lu Enxi’s book, including simulations; you can refer to it.
““The light component content at the top of the tower (in moles) is basically within the specified range, but there’s a lot too much heavy component,” OP, how should this sentence be understood?
Really? Then I need to take a good look. Thank you for the advice!
The issue was that the ethylene content obtained at the top of the tower was within the required range, but there was too much ethane. Later, I converted the original PP tower with a circulating flow system into an open-loop design; by adjusting the vaporization rate of the reboiler, the results became almost identical to those obtained with the original design. In fact, when it comes to simulating PP towers, the vaporization rate of the reboiler is an extremely important parameter – a difference of 0.01, or even 0.001, can lead to significant differences in the results.
Is it a conventional tower process or an energy-saving process?
It is a single PP tower. It has converged~ Good luck.