粒度对纳米氧化锌与硫酸氢钠溶液反应动力学的影响

Effect of Particle Size on Kinetics of the Reaction of Nano-ZnO with the Solution of Sodium Bisulfate

以纳米氧化锌与硫酸氢钠溶液的反应为模型体系,研究了反应物粒度对动力学参数的影响规律。结果表明:反应物的粒度对反应的速率常数、反应级数、表观活化能和指前因子均有较大的影响;随着反应物粒径的减小,速率常数增大,反应级数增大,表观活化能减小,指前因子减小,并且表观活化能与反应物粒径的倒数呈线性关系。

Effects of particle sizes on kinetic parameters were studied by the reaction of nano ZnO with solution of sodium bisulfate. The results show that there are obvious effects of the sizes on the rate constant, the reaction order and the activation energy;with the particle size decreasing, the rate constant and the reaction order increase, the pre exponential factor and the apparent activation energy decrease; and there is a linear relation between the apparent activation energy and the reciprocal of the size.