摘要
研究活性氧化铝经不同温度活化处理后烷烃和环烷烃在其表面上的吸附振动时间τ0和吸附停留时间τ．结果表明，对同一吸附质，活化温度越高，τ0越小，而τ基本不变，它们之间恰符合Frenkel关系式τ=τ0exp（Qi/RT）．同系物的lnτ0～Qi呈直线关系，活化温度越高，直线越陡，但各温度活化下lnτ0～Qi直线截距几乎聚于一点，即起始吸附点不受活化的影响。τ0随活化温度的变化为一曲线，曲线中存在拐点，拐点的位置相应于移动吸附层．拐点前后τ0的变化分属两种不同的类型。
The oscillation times τ0 and the residence times τof adsorption of some alkanes and cycloalkanes on aluminium oxide activated at various temperatures were investigated. The results showed as following:The higher the activation temperature, the smaller the oscillation time τ0, but τkeeps invariable. They exactly satisfy Freckle relation τ=τ0exp(Qi/RT).There exists the linear relation lnτ0 ~ Qi of homologous adsorbates,which becomes steeper as activation temperature rises.But the intercepts of the lines lnτ0 ~Qi at each activation temperature nearly assemble at one point.This means that the initial adsorption point is not affected by the activation.The chagne of τ0 as activation temperature is a curve which exists a inflection point corresponding to the mobile adsorption layer. The variation of τ0 belongs to two different types respectively on two sides of the inflection point.
出处
《贵州科学》
1999年第1期1-6,共6页
Guizhou Science
基金
贵州省科学技术基金
关键词
吸附振动时间
吸附停留时间
活性氧化铝
氧化铝
oscillation time of adsorption, residence time of adsorption, activation, active aluminum oxide
