Thermodynamic Analysis of the Synthesis Reaction of Trimethylolpropane Trioleate as Lubricants
In this study,the thermodynamic data of trimethylolpropane(TMP),oleic acid(OA),trimethylolpropane trioleate(TMPTO),and the intermediate products involved in the reaction process were calculated and analyzed using the group con-tribution method.The enthalpy change ΔHθm,entropy change ArSm,Gibbs free energy change ΔrGθm,and equilibrium constant Kθ of the reaction system were investigated within a temperature range of 403-493 K.The calculation results indicate that it is an endothermic reaction.Within the temperature range,the Gibbs free energy change decreases with increasing reaction temperature,indicating that higher temperatures favor the forward reaction.A comparison between the calculated results and known literature data demonstrates the feasibility of the group-contribution analysis method proposed herein.
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