Extraction of oil from tiger nut (Cyperus esculentus L.) with supercritical carbon dioxide (SC-CO2)

► SC-CO2 was used to extract oil from tiger nut. ► Physicochemical properties and the impact of extraction conditions were studied. ► Extraction conditions were temperature, pressure and time. ► RSM results showed that pressure and time were the most significant. ► The highest oil yield was 26.28% obtained after 210 min at 30.25 MPA and 60 °C.