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1、第24卷第5期高校化学工程学报No.5Vol.242010年10月JournalofChemicalEngineeringofChineseUniversitiesOct.2010文章编号：1003-9015(2010)05-0887-06污泥含炭吸附剂对甲苯的吸附性能研究方平,岑超平,唐志雄,陈定盛(环境保护部华南环境科学研究所,广东广州510655)摘要：采用改进的ZnCl2化学活化法制备污泥含炭吸附剂，利用X射线能谱仪、X射线光电子能谱仪、傅里叶变换红外光谱仪等对其结构进行表征。并采用动态吸附法对甲苯废气的吸附特性进行研究。结果表明，污泥含炭吸附剂对−3中低浓度甲苯(<2700mg
2、⋅m)具有很好的吸附能力，其对甲苯的吸附容量随着甲苯进口浓度的增加而增大，随着吸附温−1度的升高而降低，随着进气流量的减小而增大；在吸附温度为20℃，气体流量为500mL⋅min(停留时间为0.424s)，−3−1甲苯浓度为2700mg⋅m时，甲苯的饱和吸附容量为150.0mg⋅g；研究表明污泥含炭吸附剂对甲苯的吸附以物理吸附为主，并具有一定的化学吸附和催化氧化作用，其实验结果与Langmuir方程吻合较好。该吸附剂可在常温和有机物浓度较低的条件下用来部分替代活性炭使用。关键词：污泥含炭吸附剂；甲苯；吸附容量；物理吸附中图分类号：X701.3；TQ028.15文献标识码：AAdsorpt
3、ionPropertiesofSludgeCarbonAdsorbentforAdsorptionofTolueneFANGPing,CENChao-ping,TANGZhi-xiong,CHENDing-sheng(SouthChinaInstituteofEnvironmentalSciences,MinistryofEnvironmentalProtection,Guangzhou510655,China)Abstract:Sludgecarbon(SC)adsorbentwaspreparedbytheimprovedZnCl2chemicalactivationmethod,a
4、ndthecharacteristicsofthepreparedabsorbentwerestudiedbyusingX-rayenergyspectrum(EDS),X-rayphotoelectronspectroscopy(XPS),Fouriertransforminfraredspectroscopy(FT-IR),etc..ThedynamicadsorptionmethodwasusedtoinvestigatethetolueneadsorptioncharacteristicsoftheSCabsorbent.TheresultsindicatethattheSCab
5、sorbenthasstrongtolueneadsorptionabilitywhenthetolueneconcentrationis−3low(<2700mg⋅m),anditwasfoundthatthedynamicadsorptioncapacityofthecarbonaceousabsorbentsdecreaseswiththeincreaseofadsorptiontemperatureandincreaseswiththeincreaseoftheinfluenttolueneconcentrationandthedecreaseoftheintakeflowrat
6、e.Whentheadsorptiontemperatureis20℃,gasflowrateis−1−3500mL⋅min(residencetimeis0.42s)andconcentrationoftolueneis2700mg⋅m,thesaturatedadsorption−3capacityoftheSCadsorbentis150.0mg⋅m.Thestudyshowsthat,whenthetolueneisadsorbedbySCadsorbent,thephysicaladsorptionisprimary;however,betweentheSCandtoluene
7、,theperformancesofcatalyticoxidationandchemicaladsorptionwereidentified.TheexperimentalresultsagreewellwiththeLangmuirisothermaladsorptionequation.ThepreparedSCadsorbentcouldbeusedtopartlysubstitutethecommonlyusedactiv
