Data-Driven Modeling and Control of Semicontinuous Distillation Process
Bibliographic record
Abstract
A semicontinuous distillation process is effectively used in the separation of a multi-component mixture with low to medium production rates. This work focuses on building a data-driven model predictive control (MPC) framework to optimize the performance of a semicontinuous process by reducing total annualized cost (TAC) per tonne of feed processed while meeting the specified product quality. A data-driven modeling technique is considered in this work because of the unavailability of a highly complex and accurate first-principle model. An Aspen Plus Dynamics simulation is used as a test bed to collect the data from the process. A multi-model framework developed by modifying the traditional subspace algorithm is adapted in the shrinking horizon MPC (SHMPC) scheme to minimize TAC per tonne of feed processed. Visual Basic for Application (VBA) is used as a third tool to communicate the inputs from MPC developed in MATLAB to the process in Aspen Plus Dynamics. The simulation results illustrate that the MPC reduced the TAC/tonne of feed by 11.4% compared to the existing PI control configuration.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".