Hallo!
I'm using Aspen Plus for a continuous simulation. I want to generate a mass balance, but when i try to calculate streams or components i always get the error message: Number of variables and equations are different.
Can anyone give me a hint, how to deal with this problem?
Thanks in...
I just added an arbitrary amount of water to see what is happening. Actually i do not have so much of a clue of how the azeotropes are formed and how much water they require.
The column has a feed of 31.8 tons/hr and the share of water is 21.9. I increased to 30 and decreased also to 16...
To 25362:
Hallo again!
Thanks for your hint.
In my simulation i tried to increase the amount of water. But propionic acid was reacting in the opposite way, the distilled fraction is decreasing a lot, what still leaves me wondering. In contrast, if i decrease the amount of water the distilled...
To 25362:
But then there wouldn't be a problem with the distillation of propionic acid in this column. Or am I misunderstanding something?
In the column i'm dealing with only valuable acids are supposed to be separated from non-valuable acids. It doesn't matter at this stage if there is an...
To Stonecold:
Tahnks for your reply. The thing is that i did the simulation in Aspen. But i do not have data about the real performance.
To 25362:
Two of the involved components form an azeotrop. But not propionic acid. Its water and formic acid.
Hallo!
My question is dealing with the optimization of a unit operation distillation column in a BP plant in Hull (UK).
Formic-, Acetic-, and Propionic Acid are to be distillated. But the variables of separation and energy consumption are conflicting. The distillation of propionic acid does...
Hallo!
Can anyone tell me where i get equipment costs for distillation columns from? And costs of effluent treament?
The distillation column is a part of BP's naphtha processing.
