PDS催化脱硫反应机理的研究(Ⅰ)——双核双中心机理模型

STUDY ON THE CATALYZED DESULPHURIZATION MECHANISMS OF PDS I THE MODEL OF TWO-CENTER MECHANISM

本文在电子水平上探讨了双核酞菁钴磺酸盐(PDS)催化氧化硫化物的反应机理,提出了 PDS 自解氰化物中毒的双核双中心反应机理模型。PDS 的催化脱硫反应过程为自由基反应过程。配位中心钴离子起主催化中心的作用,而双核中间苯环上 C 位起副催化中心的作用,在主催化中心CN^-致失活的情况下,通过副催化中心上生长的多硫链使得主催化中心复活。这一机理模型得到了各种光谱测定的实验佐证。

In this paper,we have discussied the desulphurization me- chanism of sulphide catalyzed by the PDS in the level of elec- trons,and proposed the model of the two-center mechanism. The catalyzed desulphurization reaction of PDS is a free radi- cal process.In which,the cobalt cations are the major cataly- zed center,and the sites of C(4) in the benzene ring among the double core are the assistant catalyzed center.When the major catalyzed center is poisoned by the cyanide,the assistant cat- alyzed center plays an important role.AS a result,the activi- ty of the major catalyzed center is restored.This mechanism model has been confirmed by the results of spectroscopic deter- mination.