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Kinetics and Equilibrium Modeling of Sterol Adsorption on Styrene‐Divinylbenzene Cation‐Exchange Resins
Author(s) -
Yuangsawad Ratanaporn,
Sinpichai Sarawut,
Bhamarasuta Thanutchaporn,
Ladadok Chinakrit,
Pancha Surakan,
Na-Rag Duangkamol
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800608
Subject(s) - adsorption , chemistry , divinylbenzene , kinetics , desorption , langmuir adsorption model , styrene , ion exchange , ion exchange resin , chromatography , stigmasterol , organic chemistry , ion , copolymer , physics , quantum mechanics , polymer
The potential of recovering phytosterols from fatty acid methyl esters by an adsorption‐desorption process is demonstrated using a strong‐acid ion‐exchange styrene‐divinylbenzene resin (SA‐R) as an adsorbent and ethanol as a desorbent. Since the operating cost of the overall process significantly depends on the efficiency of SA‐R in the adsorption step, the behavior of SA‐R in sterol adsorption is investigated in detail using a model solution of stigmasterol in n ‐heptane. The results indicate that stigmasterol was associatively and exothermically adsorbed on SA‐R. Based on the experimental results, a simple pseudo‐second‐order model and a modified Langmuir isotherm with their parameters, which well predicted kinetics and adsorption capacity of SA‐R, are proposed.