Application of molecular sieves in the fractionation of lemongrass oil from high-pressure carbon dioxide extraction

Brazilian Journal of Chemical Engineering

卷:23

关键词: High-pressure CO2 extraction;    Lemongrass;    Molecular sieves;    Fractionation;   

DOI  :  10.1590/S0104-66322006000200009

来源: DOAJ

【 摘 要 】

The aim of this work was to study the feasibility of simultaneous process of high-pressure extraction and fractionation of lemongrass essential oil using molecular sieves. For this purpose, a high-pressure laboratory-scale extraction unit coupled with a column with four different stationary phases for fractionation: ZSM5 zeolite, MCM-41 mesoporous material, alumina and silica was employed. Additionally, the effect of carbon dioxide extraction variables on the global yield and chemical composition of the essential oil was also studied in a temperature range of 293 to 313 K and a pressure range of 100 to 200 bar. The volatile organic compounds of the extracts were identified by a gas chromatograph coupled with a mass spectrometer detector (GC/MS). The results indicated that the extraction process variables and the stationary phase exerted an effect on both the extraction yield and the chemical composition of the extracts.

【 授权许可】

Unknown