金属氧化物对SO_2在活性炭表面吸附影响的实验研究  

Effect of Metallic Oxides on Adsorption of SO_2 on Activated Carbon

作　　者：刘少俊[1,2] 曹飞飞[2] 高翔[2] 

机构地区：[1]江苏科技大学能源与动力工程学院,镇江212003 [2]浙江大学能源清洁利用国家重点实验室,杭州310027

出　　处：《动力工程学报》2013年第9期728-732,共5页Journal of Chinese Society of Power Engineering

基　　金：国家杰出青年科学基金资助项目(51125025);江苏省高校自然科学研究面上资助项目(12KJB470005);国际科技合作资助项目(2010DFA92020)

摘　　要：采用热重方法研究了150℃下金属氧化物对SO2在活性炭表面吸附的影响;对以椰壳为原料的活性炭进行了金属氧化物负载,并采用氮吸附与X射线光电子能谱(XPS)方法对负载后活性炭物理化学结构的变化进行了表征.结果表明:吸附过程存在一定的迟滞,这是由SO2从气相向孔隙扩散引起的;活性炭负载金属氧化物后,用于SO2吸附的活性位分布与平衡吸附量均发生了显著变化;负载Ce和Zr的活性炭活性位分布较均匀,有助于SO2吸附量的增加;而负载Fe、Co和Ni的活性炭活性位大部分位于外表面,导致内部孔隙利用率较低,因而抑制了SO2的吸附.Effect of metallic thermogravirnet ric method oxides on adsorption of SO2 on activated carbon was studied at 150 ℃ using Physical chemical structure changes of metallic oxide loaded coconut shell based activated carbon were characterized by Ne adsorption and X ray photoelectron spectroscopy （XPS）. Results show that there is delay of SO2 adsorption due to the diffusion of SO2 from gas phase into pores. Both the distribution of active sites for SO2 adsorption and the equilibrium absorption capacity change sig nificantly after the activated carbon being loaded with metallic oxides. The distribution of active sites in Ce- and Zr-loaded active carbon is relatively uniform, which is helpful to the enhancement of SSO2 adsorption; while most active sites in Fe-, Co- and Ni loaded active carbon are located on the outside surface, resuiting in a low utilization rate of internal pores and therefore a reduced capability in SO2 adsorption.

关 键 词：金属氧化物 SO2吸附 活性炭 热重法 

分 类 号：X511[环境科学与工程—环境工程]