复合改性活性炭纤维对SO_(2)的吸附性能研究

Study on Adsorption Properties of Composite Modified Activated Carbon Fiber for SO_(2)

以聚丙烯腈基活性炭纤维(ACF)为前驱体,分别采用200℃热处理、氨水浸泡、氨水浸泡+200℃热处理、200℃热处理+氨水浸泡4种环境进行改性,并测试了改性后材料对SO_(2)的吸附能力,初步探究了改性机理。结果表明,NH3和热处理均能使ACF的表面产生刻蚀,使ACF的比表面积增大,表面增加了羟基、羰基、酮基、醛基等有助于吸收SO_(2)的官能团,并且经过复合改性后的ACF对SO_(2)的吸附能力相比单一改性处理得到了进一步提升。本研究所用改性试剂、改性温度等条件相对于传统改性方法更为温和、环保,改性材料成本也更为低廉。

Polyacrylonitrile-based activated carbon fiber(ACF)was used as the precursor and modified by 200 ℃ heat treatment,ammonia,ammonia + 200 ℃ heat treatment,200 ℃ heat treatment + ammonia water.The adsorption capacity of ACF after modification were studied.The results shows that the ACF is etched by treatment with NH_(3) or heat treatment,which increases the specific surface area of ACF and the number of active functional groups of adsorption of SO_(2) on the surface such as hydroxyl,carbonyl,ketone and aldehyde.In addition,the adsorption capacity of ACF with compound modification for SO_(2) is further enhanced compared with that of single modified modification.Compared with the traditional modification method,this conditions such as modified reagent and modified temperature are more mild and environmentally friendly,and the cost of modified materials is also lower.