稀土对低浓度硫化氢液相催化氧化净化效率的影响  

Effect of rare earth on the liquid phase catalytic oxidation of low-concentration hydrogen sulfide

作　　者：于丽丽[1] 唐晓龙[1] 易红宏[1] 宁平[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093

出　　处：《环境科学学报》2009年第5期913-918,共6页Acta Scientiae Circumstantiae

基　　金：云南省自然科学基金(No.2007E184M);云南省教育厅科学研究基金(No.07C11400);引进人才培养基金(No.14118052)~~

摘　　要：采用液相催化氧化法净化低浓度H2S,系统研究了反应温度、pH值及助催化剂——稀土(La、Ce)的加入量对吸收液净化效率和硫容量的影响.结果显示,在优化的实验条件下(原料气H2S浓度720～920mg.m-3、反应温度60℃、pH=9.0、Fe3+浓度0.05mol.L-1、吸收液体积50mL)添加表面活性剂磺基水杨酸和稀土助催化剂后,吸收液具有较高的净化效率(98%以上)和较大的硫容量(4g.L-1以上).In this paper, the liquid phase catalytic oxidation of low-concentration H2S was investigated. The purification efficiency and sulfur capacity were affected by reaction temperature, pH and the quantity of rare-earth （ La, Ce） catalyst. Under the optimized experimental conditions, the purification efficiency was greater than 98% and the sulfur capacity of the solution was more than 4 g· L^-1 with addition of sulfosalieylic acid as stabilizer and rare earth as catalyst, The optimal conditions were H2 S concentration in feed gas 720 - 920 mg· m^-3, reaction temperature 60℃ , pH 9.0, cFe^3 ＋ = 0.05 mol ·L^-1i with an absorption solution volume of 50 mL.

关 键 词：稀土 液相催化氧化 硫化氢 

分 类 号：X701.3[环境科学与工程—环境工程]