Construction of Prediction Model of Soybean Crude Oil Storage Period Under Different Gas Regulation
Soybean crude oil was taken as the experimental material,the main quality changes of soybean crude oil during the process of controlled atmosphere storage with different gases(Ar,N2,CO2)and different volume frac-tions(95％,98％)were studied,the prediction model was constructed and verified,providing reference for the safe storage and quality prediction of soybean crude oil.The results indicated that the peroxide value(POV)of oils trea-ted with N2,Ar and CO2 gas conditioning significantly reduced by 72.7％-91.5％,74.2％-92.2％and 75.7％-89.9％than CK during storage,respectively.The effect of gas conditioning treatment on inhibiting POV was sig-nificant,and Ar had the best effect,followed by N2 and CO2.Ar and N2 gas conditioning treatment significantly in-hibited AV,while CO2 treatment significantly promoted AV.The POV and AV of three gas regulation soybean crude oil with the volume fraction of 98％were lower than that of 95％in varying degrees.Based on the POV,the first-order oxidation kinetics model combined with the Arrhenius equation was used to establish the storage period predic-tion model.The fitting accuracy was high(R2＞0.95),the verification effect was good,and the relative error of storage period prediction was 8.3％.Combined with the results of the measured and the predicted with model,at 25,40,50 and 60℃,the storage periods of CK group were 69,38,26,19 days,respectively,and the storage periods of Ar 98％and N2 98％group were 155,104,83,66 days and 129,92,76,63 days,respectively.Ar gas condi-tioning is better than N2 for maintaining soybean crude oil storage quality,but the difference is not significant,and the higher the volume fraction,the better the effect.
soybean crude oilgas regulationprediction model of storage period
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