偏钒酸钠与硫化氢反应的光谱研究  

Spectroscopic Study on the Reaction Between Sodium Metavanadate and Hydrogen Sulfide

作　　者：郭彩霞 牛艳霞[1] 申峻[1] 盛清涛[1] 刘刚[1] 王玉高[1] GUO Caixia;NIU Yanxia;SHEN Jun;SHENG Qingtao;LIU Gang;WANG Yugao(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,030024 Taiyuan,China)

机构地区：[1]太原理工大学化学化工学院

出　　处：《煤炭转化》2018年第6期72-78,共7页Coal Conversion

基　　金：国家自然科学基金资助项目(21606161);NSFC-山西煤基低碳联合基金资助项目(U1610223)

摘　　要：采用紫外可见分光光度法研究栲胶脱硫体系下的偏钒酸钠与硫化氢作用过程中的硫元素迁移规律,选用碳酸盐缓冲溶液调控反应体系的pH值为8～9来模拟硫化氢的吸收,结果表明:偏钒酸钠与HS-反应时,迅速生成了吸收波长为360nm的多硫离子,而后多硫离子再缓慢转化成硫单质;同时五价钒被还原为四价钒离子.反应体系中多硫离子的存在与c(Na_2S)∶c(NaVO_3)有关,且c(Na_2S)∶c(NaVO_3)越大,多硫离子的生成越低,意味着转化为稳定单质硫的效率越低.多硫离子自身不稳定,受温度和放置时间影响较大.UV-Vis spectrophotometry was used to study the migration of sulfur during the interaction between sodium metavanadate and hydrogen sulfide under tannin extract desulfurization system.The pH of the reaction system was controlled at 8-9 by the carbonate buffer solution to simulate the absorption of hydrogen sulfide.The results show that when sodium metavanadate reacts with HS-,the polysulfide ion with an absorption wavelength of 360 nm is rapidly generated,and then the polysulfide ion is slowly converted into elemental sulfur;meanwhile,the pentavalent vanadium is reduced to a tetravalent vanadium ion.The presence of polysulfide ions in the reaction system is related to the ratio of c(Na 2S)∶c(NaVO 3),and as the larger the ratio is,the lower the generation of polysulfide ions is,which means that the efficiency of conversion from polysulfide ion to stable elemental sulfur is lower.The polysulfide ion itself is not stable and greatly affected by temperature and storage time.

关 键 词：脱硫 偏钒酸钠 多硫离子 硫化氢 UV-VIS光谱 

分 类 号：X784[环境科学与工程—环境工程]