Dynamic Process Intensification via Data-Driven Dynamic Optimization: Concept and Application to Ternary Distillation | AIChE

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Dynamic Process Intensification via Data-Driven Dynamic Optimization: Concept and Application to Ternary Distillation

TitleDynamic Process Intensification via Data-Driven Dynamic Optimization: Concept and Application to Ternary Distillation
Publication TypeJournal Article
Year of Publication2021
AuthorsYan, L, Deneke, TL, Heljanko, K, Harjunkoski, I, Edgar, TE, Baldea, M
JournalIndustrial & Engineering Chemistry Research
Volume60
Pagination1265-10275
Date Publishedjul
Keywords5.4
Abstract

Process intensification is a design philosophy aimed at making chemical processes safer and more efficient. Its implementation often results in significant modifications to the design and structure of a process, with several conventional unit operations occurring in the same physical device. Traditionally, process intensification has focused on steady-state operation. In our previous works, we introduced dynamic process intensification (DPI) as a new intensification paradigm based on operational changes for conventional or intensified units. DPI is predicated on switching operation between two auxiliary steady states selected via a steady-state optimization calculation, which ensures that the system generates, on average and over time, the same products as in nominal steady-state operation, but with favorable economics. This paper extends the DPI concept and introduces a novel dynamic optimization-based DPI (Do-DPI) strategy that involves imposing a true cyclic operation rather than switching between two discrete states. We discuss its implementation using surrogate dynamic models learned via system identification. An extensive case study concerning a ternary distillation column separating a canonical hydrocarbon mixture shows that Do-DPI can reduce energy use by more than 4% relative to steady-state operation, with no significant deviations in product quality and production rate.

URLhttps://pubs.acs.org/doi/10.1021/acs.iecr.1c01415
DOI10.1021/acs.iecr.1c01415