物理化学学报 >> 1985, Vol. 1 >> Issue (03): 239-248.doi: 10.3866/PKU.WHXB19850308

研究论文 上一篇    下一篇

一种新的振荡体系的研究
Ⅰ. 四极质谱对溶解气体振荡释放现象的考察

李升平; 袁伟; 刘殿求   

  1. 清华大学 化学化工系
  • 收稿日期:1984-10-08 修回日期:1984-12-20 发布日期:1985-06-15

STUDY OF A NEW OSCILLATION SYSTEM
I. INVESTIGATION OF THE OSCILLATORY PHENOMENA OF THE DISSOLVED GAS BY THE QUADRIPOLE MASS-SPECTROMETER

Li Shengping; Yuan Wei; Liu Dianqiu   

  1. Department of Chemistry and Chemical Engineering Tsinghua University; Beijing
  • Received:1984-10-08 Revised:1984-12-20 Published:1985-06-15

PDF

1894

赞

摘要： 本文对溶解气体振荡释放体系使用了四极质谱进行追踪检测。确认了该体系为一种振荡的物理体系。
对溶解气体振荡释放过程的实验考察表明该体系对溶解气体的放空流量等均有阈值要求。
该体系对温度的变化是敏感的。在本文的实验条件下, 体系对压力、搅拌等扰动是稳定的。体系内的丙烯与合成气在一定的条件下还可以发生一种“协同”作用。
实验考察表明, 溶解气体振荡释放过程的产生是由于体系在过饱和状态下成核机制所致。在非平衡条件下, 气泡生长与上升过程所造成的负反馈条件是形成周期性现象的根本原因。本机制应对溶解度大而且沸点相差也大的二元气液体系具有普适性。

Abstract: A new oscillatory system has been investigated by the quadripole mass-spectrometer. It is recognized that nature of this gas-liquid two phase system is of a physical one.
For a propylene-butyl aldehyde or benzene mixture the oscillation of the concentration of propylene in the gas phase can be maintained in a certain region of pressure. The experimental work has shown that the oscillatory behavior of the releasing process of the dissolved gas requests a threshold on its flow rate and is sensitive to the change of temperature. The pressure and the stiring condition are not the origin of this oscillatory phenomenon, though they really change the period and the amplitude of the oscillation. The synthetic gas, added into this system, will play a “concert” role in their concentration oscillation, but the oscillatory directions of the concentrations of hydrogen and carbonmonoxide are opposite to that of propylene.
...