Numerical solution of nonlinear and non-isothermal general rate model of reactive liquid chromatography. Issue 5 (2nd April 2020)

• Record Type: Journal Article
• Authors: Kiran, Nadia; Perveen, Sadia; Sattar, Fouzia A.; Qamar, Shamsul
• Is Part Of: Journal of liquid chromatography & related technologies. Volume 43:Issue 5/6(2020)
• Page Start: 139
• Page End: 155
• Publication Date: 2020-04-02
• Subjects: Chromatographic reactor -- LC -- mass and heat transfer -- non-isothermal operation -- TLC; Liquid chromatography -- Periodicals; Chromatographic analysis -- Periodicals; Separation (Technology) -- Periodicals; Biotechnology -- Periodicals; Chromatography, Liquid -- Periodicals; 543.8405
• DOI: 10.1080/10826076.2019.1686705
• Languages: English
• ISSNs: 1082-6076

Abstract

Abstract: A nonlinear general rate model (GRM) of liquid chromatography is formulated to analyze the influence of temperature variations on the dynamics of multi-component mixtures in a thermally insulated liquid chromatographic reactor. The mathematical model is formed by a system of nonlinear convection–diffusion reaction partial differential equations (PDEs) coupled with nonlinear algebraic equations for reactions and isotherms. The model equations are solved numerically by applying a semi-discrete high-resolution finite volume scheme (HR-FVS). Several numerical case studies are conducted for two different types of reactions to demonstrate the influence of heat transfer on the retention time, separation, and reaction. It was found that the enthalpies of adsorption and reaction significantly influence the reactor performance. The ratio of density time heat capacity of solid and liquid phases significantly influences the magnitude and velocity of concentration and thermal waves. The results obtained could be very helpful for further developments in non-isothermal reactive chromatography and provide a deeper insight into the sensitivity of chromatographic reactor operating under non-isothermal conditions. GRAPHICAL ABSTRACT: