摘要
通过对分子筛的改性，构造各种类型、各种强度的能垒。测定在不同温度和不同压力下，吸附质在分子筛上的吸附扩散性能。采用频率响应（FR）技术研究苯在NiY分子筛上的吸附机理。分别选取的温度点为302K，373K和压力点为53．3～133Pa范围内测定FR谱图。研究结果表明，苯在NiY分子筛上是以吸附为速率控制步骤的传质过程，同时存在高频吸附和低频吸附两个不同的吸附过程。高频吸附是通过络合作用、低频吸附是以氢键作用为主的吸附过程。
The various types of energy barrier with different strength were structured by modifying molecular sieve. The adsorption and diffusivity performance of adsorbate on the molecular sieve at different temperatures and pressure were determined. Frequency response （FR） technique was used in the study on adsorption behaviors of benzene on NiY molecular sieve. FR spectrums were recorded at 302-373K and 53.3-133.3Pa. The resuits indicated that adsorption was the controlling step. There was concurrent high and low frequency adsorption. And π-complexation played a role in the high frequency absorption as well as the hydrogen bonding in the low frequency absorption.
出处
《化学与粘合》
CAS
2010年第1期28-30,71,共4页
Chemistry and Adhesion
基金
国家自然科学基金资助项目(编号:20546003)
关键词
频率响应
苯
分子筛
吸附
Frequency response
benzene
molecular sieve
adsorption
