Abstract:

In this paper, in order to study the waste fabrics activated carbon prepared by physical method, and realize the comprehensive utilization of waste fabrics, activated carbon fabrics were prepared by using waste cotton/flax(50/50) blended fabrics as raw materials and steam as activating agent，which was carried into high temperature furnace by N2. The effects of activation temperature(T)，activation time (t) and N2 flow rate (F) on the specific surface areas，pore size distributions and iodine adsorption of the activated carbon fabrics were studied with ASAP2020HD88. The adsorption properties of the waste cotton/flax(50/50) blended activated carbon fabrics were characterised by iodine adsorption quantity, and found the relationship between structure properties and adsorption properties of the waste cotton/flax(50/50) blended activated carbon fabrics . The experimental results show that the iodine adsorption quantity of activated carbon fabrics increases firstly and then decreases with the increase of T，t and F，but the pore sizes increases. When the T，t and F were 800 ℃，50 min and 240 L/h respectively，the maximum specific surface area(1047.34 m2·g-1) and maximum pore volume(1.25 cm3·g-1) of the activated carbon fabrics appeared，and the corresponding main pore sizes and iodine adsorption quantity were about 18nm and 805.16 mg·g-1 respectively. When the T，t and F were 750 ℃，50 min and 240 L/h respectively，the maximum iodine adsorption quantity(1079.39 mg·g-1) of activated carbon fabrics was achieved，and the corresponding main pore sizes were about 4 nm.

Key words: waste cotton/flax fabric, activated carbon, pore size distribution, steam activation, flow rate