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Mass Transfer and Kinetic Modelling of Supercritical Co2 Extraction of Fresh Tea Leaves (Camellia Sinensis L.).

IR@CFTRI: CSIR-Central Food Technological Research Institute, Mysore


Field	Value

Relation	http://ir.cftri.com/13805/ http://dx.doi.org/10.1590/0104-6632.20170343s20150545

Title	Mass Transfer and Kinetic Modelling of Supercritical Co2 Extraction of Fresh Tea Leaves (Camellia Sinensis L.).

Creator	Pravin Vasantrao, Gadkari Manohar, B.

Subject	08 Tea 05 Processing and Engineering

Description	Supercritical carbon dioxide extraction was employed to extract solids from fresh tea leaves (Camellia sinensis L.) at various pressures(15 to 35 MPa) and temperatures (313 to 333K) with addition of ethanol as a polarity modifier. The diffusion model and Langmuir model fit well to experimental data and the correlation coefficients were greater than 0.94. Caffeine solubility was determined in supercritical CO2 and the Gordillo model was employed to correlate the experimental solubility values. The Gordillo model fit well to the experimental values with a correlation coefficient 0.91 and 8.91% average absolute relative deviation. Total phenol content of spent materials varied from 57 to 85.2 mg of gallic acid equivalent per g spent material, total flavonoid content varied from 50.4 to 58.2 mg of rutin equivalent per g spent material and the IC50 value (antioxidant content) varied from 27.20 to 38.11 μg of extract per mL. There was significant reduction in polyphenol, flavonoid and antioxidant content in the extract when supercritical CO2 extraction was carried out at a higher pressure of 35 MPa.

Date	2017

Type	Article PeerReviewed

Format	pdf

Language	en

Identifier	http://ir.cftri.com/13805/1/bjce-34-03-799%281%29.pdf Pravin Vasantrao, Gadkari and Manohar, B. (2017) Mass Transfer and Kinetic Modelling of Supercritical Co2 Extraction of Fresh Tea Leaves (Camellia Sinensis L.). Brazilian Journal of Chemical Engineering, 34 (3). pp. 799-810.