Kinetic modeling of the sesamin conversion into asarinin in the presence of citric acid loading on Hβ

Abstract

In the present work, effects of reaction temperature, reactant concentration, catalyst loading, and rotation speed on the kinetics of sesamin conversion in a sesame oil system were studied by using citric acid loading on Hβ zeolite (CA/Hβ) as a catalyst. A kinetic model was built for sesamin conversion. The kinetic model fits correctly the experimental concentration of sesamin and asarinin (RS⁢e⁢s⁢a⁢m⁢i⁢n2 = 0.93 and RA⁢s⁢a⁢r⁢i⁢n⁢i⁢n2 = 0.97). The sesamin conversion is an endothermic reaction (△HrIso = 3 4.578kJ/mol). The CA/Hβ catalyst could be easily regenerated by calcination, and there was no obvious loss of catalytic activity when reused. Knowledge of the sesamin conversion is of great significance for guiding production and improving the value and nutrition of sesame oil. In a word, this study lays the foundation for the scale-up of the production of asarinin from sesame oil using CA/Hβ as the catalyst.

Isolation of Sesamin from Consumer Goods and Investigation of Its Acid-Catalyzed Epimerization: An Introductory Organic Lab Experiment Combining Natural Product Isolation and Spectral Analysis

“…asarinin), a diastereomer of sesamin lacking C 2 symmetry (Figure ). Episesamin is also reported to have medically useful pharmacological properties, and information related to sesamin epimerization is of interest to producers of sesame oil to improve its nutrition and value . A trace amount of diasesamin is also formed by epimerization at both benzylic stereocenters of sesamin …”