| Research Abstract |
As the fundamental equation for predicting kinematic viscosities at normal pressure, the following absolute reaction velocity theory has used.
ln(νM)=Σx_iln(ν_iM_i)-ΔG^E/RT
The ASOG-VSICO was proposed in order to obtain the excess Gibbs free energy using ASOG group contribution method. The group pair parameters have been determined for the group pairs relating to CH2, ArCH, CyCH, OH, H2O, CO, COO, CCl3, and CCl4. The kinematic viscosities were predicted for the systems containing paraffines, aromatic hydrocarbons, alcohols, water, ketones, esters, and chlorides. The absolute arithmetic average deviations between experimental and predicted values are 4.15 and 5.03% for binary and ternary systems, respectively.
To propose the predictive method of pure component viscosities using group contribution, the following Andrade uquation was used.
lnη=B(1/T-1/T_0)
The parameters B and T_0 were predicted using neural network method. The viscosities can be predicted for the paraffines, olefins, alkyns, aromatic hydrocarbons, chlorides, bromides alcohols, ketones, esters, ethers, aldehydes, and organic acids.
The predictive method to predict high- pressure viscosities using low-pressure viscosities was proposed. Fundamental equations are Peng-Robinson equation of state and excess free energy mixing rule. The high-pressure viscosities for alcohols + water systems were predicted with the average deviations of 2%.
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