湿污泥热解残渣微观孔隙结构及吸附性能  

Microscopic Pore Structure and Adsorption Properties of Resulting Residue Derived from Wet Sewage Sludge Pyrolysis

作　　者：胡艳军[1] 郑小艳[1] 严密[1] 任建莉[1] 

机构地区：[1]浙江工业大学能源与动力工程研究所,杭州310014

出　　处：《燃烧科学与技术》2016年第2期121-125,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51008279);浙江省自然科学基金资助项目(Y5100258)

摘　　要：采用管式炉热解反应器对不同含水率污泥开展高温热解制备残渣样品,采用氮气等温吸附/脱附法分析了含水率对残渣孔隙结构和表面形貌演变的影响规律,探讨了热解残渣作为废液中重金属和染料吸附剂的可行性.研究发现：与干污泥热解残渣相比,湿污泥热解残渣孔隙结构得到更充分发展,孔径2～10nm 的中孔数量明显增加,且在孔径3.75nm 出现单峰值.随着含水率增加至84%,,残渣BET 比表面积、累积总孔容积、微孔孔容等呈现减小、增大再减小的趋势;热解残渣对废液中Cu^2＋、Cr^6＋以及亚甲基蓝、孔雀石绿染料均有-定的吸附能力.The residue samples were obtained from high-temperature pyrolysis of sewage sludge with different moisturecontent using a tube furnace reactor.The influence of moisture contents on pore structure and surface morphologywas analyzed by N2 isothermal adsorption/desorption method.The feasibility of pyrolysis residues as wastewater adsorbentremoving heavy metal and dye was investigated.The results indicate that the pore structure of residue derivedfrom wet sewage sludge pyrolysis was much more fully developed than that from dry sewage sludge pyrolysis.Thereis a significant increase of the number of pores with a diameter from 2,nm to 10,nm,the maximum number belongingto pores with a diameter of 3.75,nm.BET（Brunauer-Emmett-Teller）surface area,cumulative pore volume,and thesurface area of micropores decreased firstly and then increased and further decreased as moisture content increasedfrom completely dry to 84%,.Pyrolysis residues have a potential application in purifying wastewater as adsorbentwhich could remove Cu2＋,Cr6＋and methylene blue,malachite green dye in wastewater.

关 键 词：湿污泥 热解残渣 孔隙结构 吸附性能 

分 类 号：TK63[动力工程及工程热物理—生物能]