锌、铁等离子对氧化锌烟气脱硫工艺中亚硫酸锌氧化的影响  

Effects of Zn and Fe ion on zinc sulfite oxidation in flue gas desulfurization with zinc oxide

作　　者：刘兆斌[1] 童华[1] 王京刚[1] 

机构地区：[1]北京化工大学环境科学与工程系,北京100029

出　　处：《环境工程学报》2014年第1期290-293,共4页Chinese Journal of Environmental Engineering

基　　金：科研院所技术开发研究专项资金资助项目(2013EG111129);质检公益性行业科研专项(201310289-3);北京市科学技术研究院"创新团队计划"项目(IG201204N);北京市科学技术研究院青年骨干计划项目(201305)

摘　　要：在氧化锌法脱除烟气SO2工艺中,脱硫产物亚硫酸锌的氧化是实现锌、硫资源回收的关键环节。在pH为4~5,25℃等条件下,考察了锌、铁、镉离子对亚硫酸锌氧化过程的影响。结果发现,铁离子对亚硫酸锌氧化过程有较强的催化作用,锌离子有一定的催化作用,而低浓度的镉离子几乎不影响氧化过程。进一步的研究表明,锌、铁离子的独自催化氧化速率对各自的浓度均为0.5级响应,但在混合状态下,锌离子对铁离子的催化过程有抑制作用。Abstract In the process of removing S02 from flue gas with zinc oxide, the oxidation of desulfhrizat^on products plays a vital role in recovering zinc and sulfur from the desulfurization course. Effects of zinc, iron, and cadmium ion concentration on zinc sulfite oxidation were studied at pH 4 - 5 and 25℃. It was found that there is a stronger catalytic effect of iron ions on S（IV） oxidation than that of zinc ions on S（IV） oxidation. And a low concentration of cadmium ions does not influence the oxidation process. Experimental results also showed that the oxidation rates of S （IV） with zinc and iron as catalyst are O. 5 order to their respective ion concentrations, under a mixed condition, however, zinc ions inhibit the catalytic effect of iron ions.

关 键 词：脱硫 亚硫酸锌 氧化 催化 动力学 

分 类 号：X701.3[环境科学与工程—环境工程]