Figure legends
Fig.1 Dual columns with dual temperatures (DCDT) deodorizer
Fig.2 The relationship between TFA generation in soybean oil and temperatures of packed column (a), tray column and soft column (b) in conventional deodorization system
Fig.3 The relationship between TFA generation in soybean oil and temperatures of packed column (a) and tray column (b) in DCDT system
Fig. 4 Comparison of TFA between refined oils in 2008 and zero-TFA oils in 2019
Fig. 5 Comparison of TFA between conventional refined oils and zero-TFA oils
Fig. 6 Comparison of FFA between conventional refined oils and zero-TFA oils
Fig. 7 Comparison of flavor between conventional refined oils and zero-TFA oils
Fig. 8 Comparison of color between conventional refined oils and zero-TFA oils
Fig.9 Physiochemical quality parameters changes during 18-month shelf life of conventional refined and zero-TFA soybean oil (a: acid value, b: peroxide value, c: R value of color)