Combined Noncyclic Scheduling and Advanced Control for Continuous Chemical Processes

Combined Noncyclic Scheduling and Advanced Control for Continuous Chemical Processes

A novel formulation for combined scheduling and control of multi-product, continuous chemical processes is introduced in which nonlinear model predictive control (NMPC) and noncyclic continuous-time scheduling are efficiently combined. A decomposition into nonlinear programming (NLP) dynamic optimization problems and mixed-integer linear programming (MILP) problems, without iterative alternatio...

Inequalities for Continuous-time Model for Scheduling of Continuous Processes

This paper presents a mathematical formulation for large-scale continuous process scheduling problem using unit-specific event-based continuous-time representation. The formulation is based on the work of Ierapetritou et al., (1999). The model considers the changeovers for multi-purpose units and tanks, setup constraints for parallel units and tanks, and includes product tanks that satisfy dema...

Electromembrane Processes, a Toolbox for Advanced Separations

Benchmark for Hierarchical Plantwide Control of Hybrid Chemical Processes: Control of Coupled Batch and Continuous Reactors

Chemical processes often exhibit a heterogeneous character and often have a highly complex behavior. In this work, a benchmark problem for hierarchical hybrid plantwide control is presented. The considered chemical process consists of coupled batch and continuous reactors. For this process, a hierarchical solution will be motivated. In order to compensate most disturbances, time-variant paramet...

Continuous-time versus discrete-time approaches for scheduling of chemical processes: a review

An overview of developments in the scheduling of multiproduct/multipurpose batch and continuous processes is presented. Existing approaches are classified based on the time representation and important characteristics of chemical processes that pose challenges to the scheduling problem are discussed. In contrast to the discrete-time approaches, various continuous-time models have been proposed ...