Kim, Wan-Joo Kim, Jae-Duck Oh, Seong-Geun 2024-01-21T00:05:26Z 2024-01-21T00:05:26Z 2021-09-05 2007-11 0149-6395 https://pubs.kist.re.kr/handle/201004/133995 Extract caffeine from Korean green tea using supercritical carbon dioxide as an extracting solvent carried out in a 230 mL extractor at extraction temperatures of 313-353 K and pressures of 10-40 MPa with water contents of 15.8-23.8 wt% and flow rate of 5.04-28.08 kg CO2/kg green tea per hour. The result showed that 66% of caffeine was removed under the condition of 323 K, 40 MPa with water contents of 20.8% and a flow rate of 28.08 kg CO2/kg green tea per hour. The experimental results were compared with Goto's mass transfer model in supercritical fluid extraction. It was found to be fit with regression R-2 = 0.95. It was shown that the extraction yields were dependant on the temperature, pressure, water contents, and carbon dioxide flow rate. English TAYLOR & FRANCIS INC MODEL CO2 Supercritical carbon dioxide extraction of caffeine from Korean green tea Article 10.1080/01496390701513008 1 SEPARATION SCIENCE AND TECHNOLOGY, v.42, no.14, pp.3229 - 3242 SEPARATION SCIENCE AND TECHNOLOGY 42 14 3229 3242 scie scopus 000250673300013 2-s2.0-36049049061 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article MODEL CO2 caffeine decaffeination green tea leaves supercritical carbon dioxide