| Abstract Due to the economic, environmental, cheap materials, which can realize continuous production, etc, the guaiacol synthezied by catechol and methanol via gas phase monoether reaction has attracted much attention. In order to effectively use of resources, the reaction process was discussed by thermodynamic analysis in detail. Based on the standard enthalpy of formation (ΔfHθm), the standard entropy of formation (ΔSθm) and the heat capacity (Cp,m) of catechol, methanol, guaiacol and water, the thermodynamic data on the vaporphase synthesis of guaiacol with catechol and methanol at 400—800 K were calculated, including reaction enthalpy (ΔrHm), Gibbs free energy (ΔrGm) and equilibrium constant (K). Then, the relationship between temperature and the above three variables were studied. According to the calculation, in the range of 400—800 K, the reaction is exothermic and spontaneous, also have higher equilibrium constants. The results showed that it was important for optimization of reaction process as well as the design of catalysts over the gas phase synthesis of guaiacol at lower temperatures. |
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2014, Vol. 31 
