A Non-equilibrium Approach to Model Flash Dynamics with Interface Transport. Issue 18 (2018)

• Record Type: Journal Article
• Authors: Romo-Hernandez, Aarón; Dochain, Denis; Ydstie, B. Erik; Hudon, Nicolas
• Is Part Of: IFAC-PapersOnLine. Volume 51:Issue 18(2018)
• Page Start: 874
• Page End: 879
• Publication Date: 2018
• Subjects: Non-equilibrium thermodynamics -- Irreversible thermodynamics -- Multiphase systems -- Differential-algebraic nonlinear systems -- Flash-drum dynamics -- Lyapunov stability; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2018.09.239
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: This paper presents a modeling approach for a class of multiphase chemical systems, based on non-equilibrium thermodynamics, specialized to an open flash-drum system. A compartmental model is considered to establish the dynamics of the gas and liquid phases, while a model of interface transport yields to constraints in the model. The overall system is thus written as a Differential-Algebraic system of Equations (DAE). The derived model is shown to be of index one, for which a stability analysis, based on Lyapunov first method, is briefly developed. An example is presented to illustrate the proposed modeling and stability analysis approach, together with numerical simulations.