Dynamic simulation of BTX adsorption in packed bed. (2nd January 2020)

• Record Type: Journal Article
• Authors: Ncube, T.; Kannan, P.; Al Shoaibi, A.; Srinivasakannan, C.
• Is Part Of: International journal of modelling & simulation. Volume 40:Number 1(2020)
• Page Start: 17
• Page End: 28
• Publication Date: 2020-01-02
• Subjects: Silica -- benzene -- toluene -- m-xylene -- adsorption isotherm -- aspen adsorption -- breakthrough time; Mathematical models -- Periodicals; Simulation methods -- Periodicals; Mathematical models; Simulation methods; Periodicals; 003.3
• DOI: 10.1080/02286203.2018.1510205
• Languages: English
• ISSNs: 0228-6203

Abstract

ABSTRACT: Rigorous design of commercial-scale packed beds accounting multicomponent adsorptions is mathematically complex, often resulting in adopting approximate simplified methods. Hence the present work attempts to simulate adsorption of BTX (benzene, toluene, m xylene) in a packed column of 10 m height and 3 m diameter for two adsorbents namely KIT-6 and mKIT-6 (surface modified) using Aspen Adsorption. The adsorption isotherm data of pure BTX components were generated for the adsorbent using a gas phase gravimetric analyzer. A comparative adsorption capacity indicates adsorption in the following order X > T > B for both the sorbents. m-xylene and toluene performed better on mKIT-6, as a result of which breakthrough and saturation time were higher. An increase in adsorbate feed concentration reduced the breakthrough and saturation time, proportional to the magnitude of increase. A significant reduction in the breakthrough time for benzene and toluene was observed due to competitive adsorption in the case of multicomponent adsorption as compared to pure component adsorption.