LAPSE:2019.0619
Postprint
LAPSE:2019.0619
Finding better limit cycles of semicontinuous distillation. Part 1: Back-stepping design Methodology
Pranav Bhaswanth Madabhushi, Thomas Adams II
July 9, 2019
Semicontinuous ternary zeotropic distillation is a periodic process that is carried out
in a single distillation column and a tightly integrated external middle vessel. In the
state-of-the-art design procedure of this process, a continuous distillation process that
separates the top and bottoms products to the desired purity is used to generate an arbitrary
initial state for simulating the dynamics of the semicontinuous distillation process.
Although this method is useful in estimating the limit cycle, it was later found that the
operation of the process in this limit cycle was economically sub-optimal. In this study,
a new algorithmic design procedure, called the back-stepping design methodology, is
proposed to find better limit cycles for zeotropic ternary semicontinuous distillation
using the aspenONE Engineering suite. The proposed methodology was applied to two
different case studies using feed mixtures with different chemical components. A comparison
with the current design procedure for the two case studies indicates that the
new method outperforms the state-of-the-art by finding limit cycles that were 4% to
16% lower in separating cost, which was the chosen measure of cycle performance.
Keywords
Hybrid dynamic system, Limit Cycle, Particle Swarm Optimization, Process Design, Semicontinuous Distillation
Suggested Citation
Madabhushi PB, Adams T II. Finding better limit cycles of semicontinuous distillation. Part 1: Back-stepping design Methodology. (2019). LAPSE:2019.0619
Author Affiliations
Madabhushi PB: McMaster University
Adams T II: McMaster University [ORCID]
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Journal Name
Industrial and Engineering Chemistry Research
Year
2019
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LAPSE:2018.0738
Side Stream Control in Semicontinuo...
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LAPSE:2019.0619
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