2-氰基吡啶耦合甘油/ CO₂ 反应合成GC的热力学分析

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引用格式：.2-氰基吡啶耦合甘油/ CO2 反应合成GC的热力学分析[J].当代化工，2026,55（4）：892-898.

LI Jinchun, LIU Zhenmin, ZHAO Binbin. Thermodynamic Analysis of Glyceryl Carbonate Synthesis by 2-Cyanopyridine Coupled Glycerol/ CO2 Reaction[J]. Contemporary Chemical Industry, 2026, 55 (4): 892-898.

2-氰基吡啶耦合甘油/ CO2 反应合成 GC 的热力学分析

李锦春，刘振民，赵斌彬

中图分类号：TQ021.2

文献标志码：A

文章编号：1671-0460（2026）04-0892-07

Thermodynamic Analysis of Glyceryl Carbonate Synthesis by 2-Cyanopyridine Coupled Glycerol/CO₂ Reaction

LI Jinchun, LIU Zhenmin, ZHAO Binbin

(College of Chemical Engineering and Technology, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China)

Abstract: Thermodynamic analysis was made on the reaction of glycerol and CO2 with 2-cyanopyridine as coupling agent to synthesize a new glycerol derivative glyceryl carbonate (GC). The thermodynamic parameters for the reaction between glycerol and CO2 to form GC were estimated by Benson and Joback group contribution method. Under the standard state, the enthalpy change and the Gibbs free energy change in the GC synthesis of glycerol/ CO2 , indicating that the reaction was difficult to proceed spontaneously under these conditions, so a new reaction path needed to be constructed to continue the reaction. After adding the couplant 2-cyanopyridine to the reaction, the enthalpy change of the reaction in the standard state was , and the Gibbs free energy change was , and the coupling reaction were carried out spontaneously. The relationships between the enthalpy change, Gibbs free energy change and equilibrium constant of the reaction with temperature were further analyzed. The results showed that in the range of 300 - 390 K, the target reaction is an exothermic process, but increasing the temperature causes its Gibbs free energy to increase and the equilibrium constant to decrease, thermodynamically inhibiting the reaction. However, the addition of 2-cyanopyridine could break the thermodynamic limit of the glycerol/ CO2 reaction and make the reaction proceed positively.

Keywords: CO₂; Glycerol; Glyceryl carbonate; Benson method; Thermodynamics

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