抗坏血酸对CH_2(COOH)_2-BrO_3^--Mn^(2+)-H_2SO_4体系化学振荡反应的影响  

Effect of Ascorbic Acid on Chemical Oscillation of CH_2(COOH)_2-BrO_3-Mn^(2+)-H_2SO_4 System

作　　者：范文琴[1] 王永辉[1] 

机构地区：[1]大连交通大学环境与化学工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2009年第3期66-70,共5页Journal of Dalian Jiaotong University

摘　　要：研究了抗坏血酸对CH2(COOH)2-B rO3--Mn2+-H2SO4体系化学振荡反应的影响,考察了该体系中各反应物的初始浓度范围及主要影响因素.结果表明:在5.7×10-4~8.5×10-2mol/L的范围内,抗坏血酸对振荡反应的诱导期有较大影响,且抗坏血酸的浓度与振幅及抗坏血酸浓度的对数与诱导期倒数的对数均存在良好线形关系.诱导期和周期的表观活化参数分别为56.63 kJ/mol,73.81 kJ/mol;同时还对抗坏血酸参与下可能振荡反应机理进行了探讨.Effect of ascorbic acid on malonic acid -BrO3^--Mn^2＋-H2SO4 chemical oscillation was studied, and the main factors of influence and the initial concentration ranges of the each reactant were investigated. Results show that ascorbic acid has strong influence on the induction phase in the range of 5.7 × 10^-4 - 8.5 × 10^-2 mol/L , and the ascorbic acid concentration acid has good linear relationship with the vibration amplitude, while the Inc（ ascorbic acid concentration） is linear with In （ 1/tin ）. The apparent activation energy of induction phase and oscillating period were obtained as Ein= 56.63 kJ/mol,Ep = 73.81 kJ/mol. The possible oscillating mechanism is also discussed briefly.

关 键 词：化学振荡反应 抗坏血酸 诱导期 振荡周期 

分 类 号：O643.132[理学—物理化学]