Modeling of cane sugar colorants adsorption in pulsed-bed adsorbers

Name: Chanya Plangklanga

Organization : Suranaree University of Technology. School of Chemical Engineering

Email : Chanya.Plangklang@gmail.com

Name: Terasut Sookkumnerd

Organization : Suranaree University of Technology. School of Chemical Engineering

Email : terasut @gmail.com

keyword: Pulsed-bed reactors

LCSH: Sugar -- Manufacture and refining

LCSH: Carbon, Activated

Abstract: Pulsed-bed adsorption columns with activated carbon as an adsorbent are used in sugar refining processes to remove sugar colorants in syrup, thereby reducing syrup color. Pulsed-bed adsorbers simulate countercurrent movement of the adsorbent through periodic displacement of the solid phase. With syrup feed entering from the bottom, spent adsorbent is withdrawn from the bottom of the adsorber, while fresh or reactivated adsorbent is introduced at the top of the column at a specified cycle time. Due to the nature of this operation, true steady state does not exist. However, the column effluent exhibits periodic behavior after a sufficient number of cycles; therefore, a cyclic steady state is achieved. The aim of this work is to develop a mathematical model based on the linear driving force assumption and to solve it using the numerical method of lines in the Scilab program. Based on breakthrough data from a packed-bed adsorber using Norit Mag 30I, the adsorption equilibrium constant and overall mass-transfer coefficients are evaluated. These parameters are then applied to solve the pulsed-bed model. Numerical analysis of the pulsed-bed adsorber is used to estimate optimal cycle times of the column at different syrup flow rates. The results indicate that increasing the syrup flow rate leads to a decrease in the optimal cycle time

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2021

Modified: 2026-02-02

Issued: 2026-02-02

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application/pdf

BibliograpyCitation : In Thai Institute of Chemical Engineering and Applied Chemistry. The 30th Thai Institute of Chemical Engineering and Applied Chemistry Conference (TIChE 2021) (SEP08). Nakhon Ratchasima : Suranaree University of Technology

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