一种新的ⅥA族化学反应振荡器：Na_2S_2O_8－KSCN－CuSO_4体系

A New Chemical Oscillator in Group ⅥA:Na_2S_2O_8-KSCN-CuSO_4 System

一种新的ⅥＡ族化学反应振荡器：Ｎａ_２Ｓ_２Ｏ_８－ＫＳＣＮ－ＣｕＳＯ_４体系林娟娟，高庆宇，宋浩，黄振炎，赵学庄（南开大学化学系，天津，３０００７１）关键词化学振荡，非线性化学反应，过硫酸盐，硫氰酸盐自经典的均相ＢＺ化学振荡反应体系的发现及提出耗散结构...

A new chemical oscillator in group Ⅵ A was first discovered in the Na_2S_2O_8-KSCN-CuSO_4 system.In a batch reactor the reaction displays single-peak behavior in redox potential. In a continous stirring tank reactor(CSTR) the reaction displays sustained oscillations both in redox potential and pH. Depending upon the composition and flow rate of the input stream, we find either a low pH(pH=l￣4) steady state,sustained oscillation(pH=5￣6) ,or a high pH(pH=9￣10)steady state. The reaction system still displays oscillation behavior when the reductant (SCN-)is in excess. The oscillatory region is very narrow in NaOH concentration(3×10 ￣(-3) mol/L<[NaOH] <1×10￣(-2) mol/L).