Simulation background:
I have to separate mixture of components via distillation, I have already performed Radfrac distillation and got desired results.
Property method used: Peng-Robinson.
To optimize it further and design as per requirement, i have to simulate the given problem in BatchDistillation method for Aspen Plus.
Issue Faced :
While Performing Batch distillation simulation, I have gotten below severe error:
"ERROR T-LOOP NOT CONVERGED IN 37 ITERATIONS, FLASH CALCULATION CONVERGED BUT RESULTS MIGHT NOT BE RELIABLE".
Property method used: Peng-Robison
Flash Convergence calculation method used: Gibbs
Flash convergence iterations : 1000
Batch Distillation iterations : 1000
The only tear-stream present in the simulation is Reflux.
Initial Condition : Total reflux
Condenser type : Total
NRTL method was initially tried, but was not able to predict known binary azeotrope of some selected components.