Mn(Ⅱ),Fe(Ⅲ)和活性炭对S(IV)液相氧化的催化作用  

CATALYTIC EFFECTS OF Mn(Ⅱ), Fe(Ⅲ) AND ACTIVATED CARBON ON THE LIQUID PHASE OXIDATION OF S(Ⅳ)

作　　者：徐永福[1] 苏维瀚[2] 

机构地区：[1]中国科学院大气物理研究所,北京100029 [2]中国科学院生态环境研究中心,北京100085

出　　处：《Chinese Journal of Catalysis》1995年第1期77-80,共4页催化学报（英文）

摘　　要：在金属离子参与下S(Ⅳ)的催化氧化反应是大气含水体系中S(Ⅳ)转化为S(Ⅵ)的重要反应.普遍认为大气中的主要金属元素 Mn,Fe,Cu和 Co对 S(Ⅳ)的氧化有催化作用.尽管 Mn(Ⅰ)和 Fe(Ⅱ)对于 S(Ⅳ)催化氧化的化学动力学已被广泛研究,但至今尚未取得一致的结果;有关Mn(Ⅰ)和 Fe(Ⅱ)催化氧化的协同作用亦是人们争论的问题。本工作在分别研究了Mn(Ⅰ)和 Fe(Ⅱ)对 S(Ⅳ)氧化的催化作用的基础上,进一步考察了 Mn(Ⅰ)和 Fe(Ⅱ)是否存在着协同催化作用.另外,还探讨了Fe(Ⅱ)和活性炭、Mn(Ⅰ)和活性炭对S(Ⅳ)的氧化是否存在着协同催化作用.The chemical kinetics of the catalytic oxidation of S( Ⅳ ) by Mn( Ⅱ ) in buffered and unbuffered solution was studied. The kinetic equation was proposed, and the activation energy of 77.7 kJ mol^(-1) in buffered solution of pH=5. 89 was obtained. On the basis of respective investigations of catalytic oxidation of S(Ⅳ) by Mn(Ⅱ) and Fe(Ⅲ), the synergic catalytic effect of Mn( Ⅱ ) and Fe( Ⅲ ) on the oxidaton of S(Ⅳ ) was explored. Results showed that the catalytic activity of Mn ( Ⅱ ) was greater than that of Fe ( Ⅲ ), there was no synergic catalytic effect of Mn( Ⅱ ) and Fe( Ⅲ ), and that the existence of Fe( Ⅲ ) could lower the catalytic activity of Mn( Ⅱ ). Using activated carbon to simulate soot in the experiments, the catalytic effects of Fe( Ⅲ )+activated carbon, and Mn( Ⅱ )+activated carbon were also explored. Results also showed that there were no synergic effects of them.

关 键 词：二氧化硫 催化 氧化 锰离子 铁离子 活性炭 

分 类 号：O613.51[理学—无机化学] O643.31[理学—化学]