On decoupling rate processes in chemical reaction systems – Methods and applications. (9th June 2018)

• Record Type: Journal Article
• Authors: Billeter, Julien; Rodrigues, Diogo; Srinivasan, Sriniketh; Amrhein, Michael; Bonvin, Dominique
• Is Part Of: Computers & chemical engineering. Volume 114(2018)
• Page Start: 296
• Page End: 305
• Publication Date: 2018-06-09
• Subjects: Chemical reaction systems -- Reaction variants -- Vessel extents -- Data reconciliation -- State and rate estimation -- Modeling and identification -- Control and optimization; Chemical engineering -- Data processing -- Periodicals; 660.0285
• DOI: 10.1016/j.compchemeng.2017.09.021
• Languages: English
• ISSNs: 0098-1354

Abstract

Highlights: The state space is partitioned in subspaces linked to particular rate processes. The transformation of original states to extents and its properties are reviewed. Various ways to compute experimental extents from measurements are described. Applications for modeling and operation of chemical systems are outlined. Abstract: Models of chemical reaction systems can be complex as they need to include information regarding the reactions and the mass and heat transfers. The commonly used state variables, namely, concentrations and temperatures, express the interplay between many phenomena. As a consequence, each state variable is affected by several rate processes. On the other hand, it is well known that it is possible to partition the state space into a reaction invariant subspace and its orthogonal complement using a linear transformation involving the reaction stoichiometry. This paper uses a more sophisticated linear transformation to partition the state space into various subspaces, each one linked to a single rate process such as a particular reaction, mass transfer or heat transfer. The implications of this partitioning are discussed with respect to several applications related to data reconciliation, state and rate estimation, modeling, identification, control and optimization of reaction systems.