LAPSE

LAPSE:2018.0738
Preprint
LAPSE:2018.0738
Side Stream Control in Semicontinuous Distillation
Pranav Bhaswanth Madabhushi, Thomas Adams II
October 18, 2018
The idea to reduce cycle time (𝑇), by controlling the side stream flow rate using a feedforward control model -- the ideal side draw recovery arrangement (ISR) -- was standard in most semicontinuous distillation studies. However, its effect, particularly on ‘𝑇’ and more broadly on the system dynamics, was not clearly understood. In the current study, we compare the performance of using a modified form of ISR model with the status quo, based on the criteria, 𝑇 and separating cost (SC) on different case studies. Results show that the modified control model performed better with a 10-20% reduction in SC while maintaining product purities. Furthermore, the side stream flow rate trajectory that minimizes SC was found by using dynamic optimization and it did not differ a lot from the trajectory generated by the modified control model. The improvement in SC was at most 2%.
Keywords
dynamic optimization, dynamical system analysis, Semicontinuous Distillation, side stream control
Suggested Citation
Madabhushi PB, Adams T II. Side Stream Control in Semicontinuous Distillation. (2018). LAPSE:2018.0738
Author Affiliations
Madabhushi PB: Mcmaster University
Adams T II: Mcmaster University
[Login] to see author email addresses.
Journal Name
Computers and Chemical Engineering
Volume
119
First Page
450
Last Page
464
Year
2018
Publication Date
2018-09-25
Version Comments
Original Submission
Record Map
Preprint

LAPSE:2018.0738
This Record
Model

LAPSE:2019.0423
Finding better limit cycles of semi...
Download
Files
[Download 1v1.pdf] (2.5 MB)
Oct 18, 2018
Manuscript Preprint
[Download 2v1.7z] (38.9 MB)
Oct 18, 2018
System II - Aspen Plus Dynamics Files
[Download 3v1.7z] (19 MB)
Oct 18, 2018
System III - Aspen Plus Dynamics Files
[Download 4v1.7z] (13.8 MB)
Oct 18, 2018
System IV - Aspen Plus Dynamics Files
[Download 5v1.7z] (7.5 MB)
Oct 18, 2018
System V - Aspen Plus Dynamics Files
[Download 6v1.7z] (10.2 MB)
Oct 18, 2018
System I - Aspen Plus Dynamics Files
License
CC BY-NC-ND 4.0
Meta
Record Statistics
Record Views
194
Version History
[v1] (Original Submission)
Oct 18, 2018
 
Verified by curator on
Oct 18, 2018
This Version Number
v1
Citations
Most Recent
This Version
URL Here
http://psecommunity.org/LAPSE:2018.0738
 
Original Submitter
madabhup
LAPSE Records Linking Here
Directly Related to This Work
Finding better limit cycles of semicontinuous distillation