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1、第24卷第6期高校化学工程学报No.6Vol.242010年12月JournalofChemicalEngineeringofChineseUniversitiesDec.2010文章编号：1003-9015(2010)06-1038-08低浓度氰化氢在浸渍活性炭上的吸附净化研究宁平,蒋明,王学谦,杨弘,师雁,柏杨巍(昆明理工大学环境科学与工程学院,云南昆明650093)摘要：采用浸渍法改性活性炭吸附脱除低浓度氰化氢(HCN)，研究了NaOH与磺化酞菁钴(CoPcS)混合浸渍改性活性炭净化HCN的性能。研究表明：改性炭
2、在制备过程中适当增加NaOH的浓度有利于提高其吸附HCN的能力，当NaOH−1浸渍液浓度为10%时，CoPcS/NaOH配比0.15mg⋅g、焙烧温度350℃为最佳制备条件；吸附反应阶段较适宜的体积−1空速为923h、氧体积分数2%、吸附温度为90℃。N2吸附表征了活性炭的比表面积和孔结构性质，与原活性炭相比，CoPcS与NaOH混合浸渍改性活性炭的比表面积和孔体积有所降低，但对HCN的吸附能力却显著提高，说明HCN与浸渍剂在活性炭表面发生了化学反应；孔径分布说明HCN在改性炭的中孔或大孔上参与化学吸附造成微孔扩充，而
3、不是微孔填充和覆盖。关键词：氰化氢；浸渍活性炭；吸附净化；磺化酞菁钴中图分类号：TQ028.15文献标识码：AAdsorptionofLow-ConcentrationHCNonImpregnatedActivatedCarbonNINGPing,JIANGMing,WANGXue-qian,YANGHong,SHIYan,BAIYang-wei(FacultyofEnvironmentalScienceandEngineering,KunmingUniversityofScienceandTechnology,Kun
4、ming650093,China)Abstract:TheactivatedcarbonwasmodifiedbyimpregnationwithNaOHandthemixtureofNaOHandsulfonatedcobaltphthalocyanine(CoPcS),anditsperformanceofremovinglow-concentrationHCNwasstudied.Theresultsshowthat,inthemodificationprocess,increasingtheNaOHconcen
5、trationproperlycanenhancetheadsorptionofHCNonthemodifiedactivatedcarbon.WhentheNaOHconcentrationusedinimpregnationis10%(wt),theoptimumconditionsforpreparingmodifiedactivatedcarbonwithNaOHand−1CoPcSareCoPcS/NaOHmassratioof0.15mg⋅gandthecremationtemperatureof350℃.
6、ThesuitableconditionsfortheHCNadsorptionofthepreparedmodifiedactivatedcarbonwerefound,whicharevolume−1spacevelocityof923h,oxygencontentof2%andadsorptiontemperatureof90℃.ThespecificsurfaceandtheporestructurepropertiesofthemodifiedactivatedcarbonsweretestedbyN2ads
7、orptionexperiments.Comparedwiththevirginactivatedcarbon,thespecificareaandporevolumeoftheimpregnatedonesarereduced,whiletheHCNadsorptionabilityincreases.TheN2adsorptiontestsalsoshowthat,afterHCNadsorption,thespecificareaandporevolumeofthemodifiedactivatedcarboni
8、ncreaseandwhicharemainlycausedbytheincreaseofthemicropores.TheseresultsindicatethattheHCNischemicallyadsorbedattheporesofmodifiedactivatedcarbonwithmedialormacrosize,
