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

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 f...

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Bibliographic Details
Published inBrazilian journal of chemical engineering Vol. 23; no. 2; pp. 219 - 225
Main Authors Paviani, L., Pergher, S. B.C., Dariva, C.
Format Journal Article
LanguageEnglish
Published Brazilian Society of Chemical Engineering 01.06.2006
Subjects
ENGINEERING, CHEMICAL
High-pressure CO2 extraction
Fractionation
Lemongrass
Molecular sieves
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Summary: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.
ISSN:0104-6632
1678-4383
0104-6632
DOI:10.1590/S0104-66322006000200009