改性活性炭纤维对含乙醇有机废气的吸附性能研究

文章研究了活性炭纤维(ACF)对乙醇的吸附性能以及表面基团和形态对吸附性能的影响,并以提高活性炭纤维对乙醇的吸附性能为出发点,采用无机盐浸渍及二次热处理方法对ACF进行表面改性,改性前ACF对乙醇的吸附容量为376mg/g,经过无机盐浸渍并二次热处理改性的ACF对乙醇的吸附容量达到了516mg/g,穿透时间也由改性前的30min延长到了80min。结果表明,无机盐浸渍和二次热处理改变了ACF表面基团和形态,从而提高了ACF对乙醇的吸附性能。

Adsorption of Ethanol Vapor Containing Organic Gases on nodified Activated Carbon Fiber

Adsorption properties of ethanol vapor and the influence of surface functional groups and structure were studied. ACF was modified by post-carbonizing and/or dipping in a certain inorganic salt solution to improve the adsorption capacity. After modifying,the adsorption capacity is greatly improved,such as 376mg/g and 516mg/g,for ACF0 and ACF3 respectively. The breakthrough time was also increased tremendously,30min and 80min for ACF0 and ACF3 respectively. The results suggested that impregnant and post-carbonization changed the surface structure and surface groups greatly,which was beneficial for adsorption of ethanol onto ACF.