脉冲电场对丙酸乙醇酯化反应影响

Effect of pulse electric field on esterification of propionic acid and ethanol

摘要: 通过脉冲电场(PEF)对丙酸乙醇酯化反应的强化,研究了脉冲电场对丙酸乙酯含量、反应速率常数、活化能的影响。采用气相色谱分析丙酸乙酯含量,结果表明,脉冲电场促进了酯化反应。丙酸乙酯的含量和反应速率常数随着PEF场强的增加而增大;实验条件下的丙酸乙醇酯化反应为二级反应,当PEF场强为0、6.6、13.3、20.0kV/cm时,活化能分别为77.05、72.60、62.85、62.49kJ/mol。

Abstract: The effects of pulse electric field (PEF) on ethyl propionate concention, rate constant and activation energy were studied in this paper.The ethyl propionate concention was analyzed using a gas chromatography system.The results indicate that esterification could be promoted by PEF treatment under appropriate condition.The higher the PEF intensity applied, the higher the ethyl propionate concention and rate constant were.The reaction order was 2.When PEF intensity were 0, 6.6, 13.3, 20.0 kV/cm, it was calculated that the activation energy for the esterification was 77.05, 72.60, 62.85, 62.49 kJ/mol, respectively.