(441c) Process Intensification Framework for Extractive Separation Systems
Recent advances in the synthesis of process intensification systems have been leveraging phenomenological representation methods to systematically generate process solutions without pre-postulation of plausible equipment-based flowsheets which may hinder the discovery of novel design configurations [4-6], which also provides the opportunity to investigate the effect of functional materials at phenomenal level from process fundamental perspective . However, the operational performances (e.g., flexibility, safety, controllability) in the resulting intensified designs, which are crucial to practical implementation, are mostly neglected at this synthesis stage . Therefore, a holistic approach for the synthesis of extractive separation systems, with simultaneous consideration of entrainer selection and operability assessment, is still lacking.
To address this challenge, we have recently developed a systematic framework for the synthesis of operable process intensification systems , which features: (i) process synthesis, integration, and intensification using phenomena-based Generalized Modular Representation Framework (GMF)  to derive optimal design configurations, (ii) integrated steady-state operability and inherent safety considerations , and (iii) simultaneous design and control with explicit model-based predictive control strategies following the PAROC (PARametric Optimization and Control) framework . In this work, we apply the proposed framework to synthesize enthanol/water extractive separation processes with guaranteed operability, safety, and controllability performances. Two entrainer candidates are considered and examined with respect to process profitability, safety, and environmental considerations: a conventional entrainer ethylene glycol (EG) and an ionic liquid entrainer 1-ethyl-3-methyl-imidazolium acetate ([EMIM][OAc]). Mass and/or heat integration are also simultaneously explored to reduce energy consumption, resource utilization, and waste production.
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