栲胶脱硫过程中单质硫生成机理  

Formation mechanism of elemental sulfur in tannin extract desulfurization process

作　　者：张卫帅[1] 董跃[2,3] 凌开成[1] 李逢玲[1] 王顺华[1] 牛艳霞[1] 

机构地区：[1]太原理工大学化学化工学院,山西太原030024 [2]太原理工大学环境科学与工程学院,山西太原030024 [3]太原重工股份有限公司煤化工设备分公司,山西太原030024

出　　处：《洁净煤技术》2011年第2期60-63,共4页Clean Coal Technology

基　　金：山西省科技攻关项目(2007032039)

摘　　要：采用循环伏安法研究了栲胶脱硫过程中HS-和V5+之间的氧化还原反应。实验结果表明:在栲胶脱硫过程中,HS-和V5+之间的反应有多硫离子Sx2-生成,多硫离子是反应过程中的活性中间产物,其进一步转化可生成单质硫S8。随着反应物V5+浓度的增加,单质硫的生成速率增加。最后,提出了一种硫氢根HS-和V5+反应生成单质硫S8的自由基机理。The redox reaction between HS-and V5＋ in the process of tannin extract desulfurization was investigated by cyclic voltammetry（CV）.The results show that HS-is first oxidized to produce polysulfides（Sx2-） which is reactive intermediate product and will further transform to form elemental sulfur S8,and the production rate of elemental sulfur S8 increases along with increasing the concentration of V5＋.Additionally,a free radical reaction mechanism which describes the formation of elemental sulfur S8 from the redox reaction was proposed.

关 键 词：栲胶脱硫 多硫离子 单质硫 自由基机理 

分 类 号：TQ546.5[化学工程—煤化学工程]