负载氧化锌活性炭对苯的吸附性能及热力学研究  

Research on the Adsorption Capability and Thermodynamics of Activated Carbon Supported ZnO on Benzene

作　　者：周烈兴[1,2] 钱天才[1] 王绍华[1] 雷浩[3] 

机构地区：[1]昆明理工大学分析测试研究中心,昆明650093 [2]昆明理工大学冶金与能源工程学院,昆明650093 [3]云南省建筑科学研究院,昆明650223

出　　处：《功能材料与器件学报》2011年第2期162-167,共6页Journal of Functional Materials and Devices

基　　金：科技部国际科技合作计划项目(2008DFA91500);云南省环境保护局科技发展计划资助项目(2006GH01)

摘　　要：对微波活化处理废触媒制备的活性炭进行了微结构分析,发现活性炭具有孔隙发达,微孔贯穿性好的结构,孔隙中负载了少量的具有催化作用的氧化锌。采用光离子化气相色谱法测定了20℃、30℃和40℃活性炭对苯的吸附等温线,并用Langmuir方程进行了数据拟合,且适合于该方程。同时计算了平均吸附热(△H),吸附自由能(△G),吸附熵(△S)。结果表明所研究的活性炭为负载氧化锌活性炭,孔容大,对苯具有极强的吸附性能,而且在常温下不容易脱附。The microstructure of spent catalyst by microwave activation was investigated.It is found that the activated carbon has developed porous structure and pore connectivity with each other,and a small number of pores with catalytic zinc oxide.The adsorption isotherms of benzene on activated carbon at temperatures of 20,30 and 40℃ were measured,and the concentration of inlet and outlet was detected by photo-ionization gas chromatography.The experimental data was analyzed theoretically by Langmuir,and the isotherms could be well fitted into Langmuir model.Average adsorption heat（△H）,free energy（△G） and entropy（△S） of benzene at different adsorption quantity in the activated carbon were calculated.The study results show that the microwave activated carbon is loaded by zinc oxide,has large pore volumeand excellent adsorption capacity for benzene,and is not easy desorbed at room temperature.

关 键 词：负载活性炭 苯 吸附 热力学 

分 类 号：TQ028[化学工程] O657[理学—分析化学]