Nd-Cr/Al_2O_3催化剂上苯直接氧化制苯酚的动力学研究

Kinetics study of the direct hydroxylation of benzene to phenol by Nd-Cr/Al_2O_3

研究了苯直接氧化制苯酚反应的动力学行为。推测了Nd-Cr/Al2O3催化剂上过氧化氢氧化苯为苯酚的反应过程,建立了该反应动力学数学模型,模型很好的解释了实验结果。结果表明,在实验条件下,该羟基化反应对反应物苯、氧化剂过氧化氢和催化剂用量都是一级反应,反应的活化能为24.41 kJ/mol。

The kinetics of the direct hydroxylation of benzene to phenol was studied by means of ultraviolet spectroscopy.The hydrogen peroxide reactions of benzene to phenol with the Nd-Cr/Al2O3 catalyst was speculated,the mathematical model of the kinetic was established as well as explain the experimental results.The results showed that under the experimental conditions,the hydroxylation reaction of benzene,oxidant hydrogen peroxide and catalyst were first-ordered reaction.The activation energy of the reaction was evaluated to be 24.41 kJ/mol.