No replies to this topic

[nabonino]

I am trying to simulate a reactive dividing wall distillation column in aspen using 2 RADFRAC columns. I am making DME from methanol. The distillate should be DME, side stream Methanol, bottoms as water. I keep getting these errors. My reaction is balanced and I don't know what this could be or what to fix. Any ideas?

 

Sample numbers being used are from an article. Their design parameters along with screen shots of my simulation are attached. 

 

 

***SEVERE ERROR

   COMPONENT BALANCE EQUATION FAILED TO CONVERGE.

 

***SEVERE ERROR

   THE FOLLOWING STAGES DRIED UP (VAPOR OR LIQUID FLOW APPROACHES 0):

     2    3   35

   A LIMIT OF  0.10000E-04 * SUM OF FEEDS WAS IMPOSED ON THE FLOW RATES

   OR A LIMIT OF  0.10000E-04 WAS IMPOSED ON THE STAGE V/L OR L/V RATIO.

Attached Files

•  sc.docx   3.16MB   9 downloads