Preparation of Activated Carbon from Wastepaper

以废报纸为原料制备活性炭，作为除造纸外的一种循环利用方式。废报纸制备的活性炭比表面积为838 m^2/g，微孔体积为0.368 ml/g，中孔体积为0.138 ml/g，与市售活性炭基本相同。其中，孔径半径为3 ~ 25 nm的中孔和孔径半径为25 ~ 250 nm的大孔的数量分别是试剂活性炭的8 ~ 14倍。以废报纸为原料制备的活性炭具有良好的多孔结构，特别是中孔和大孔结构。此外，还研究了以废纸为原料制备的炭化材料的比表面积。800℃炭化样品的比表面积最高，为418 m^2/g，等于或大于市售木炭的比表面积。800℃炭化后的样品对碘的吸附量最高，为581 mg/g，吸附速率最快。而在600 ~ 800℃炭化时，其湿度控制能力最高。以废酚醛树脂和杂志废纸为原料，采用气相活化法制备了炭化板。对原板进行碳化处理后，其弹性模量（MOE）增加。然而，MOE和破裂模数（MOR）随着激活而降低。含废酚树脂的炭化板比表面积为650 ~ 760 m^2/g，表明炭化板具有发育良好的多孔结构。

Activated carbon was prepared from waste newspaper as a way to recycling other than the paper-making. The specific surface area of activated carbon prepared from waste newspaper was 838 m^2/g, the micropore volume was 0.368 ml/g, and the mesopore volume was 0.138 ml/g, which is about the same as commercially available activated carbon. In particular, as compared with reagent-activated carbon, the quantities of mesopores with a pore radius of 3-25 nm and macropores with pore radius of 25-250 nm were 8-14 times larger, respectively. Activated carbon prepared from waste newspaper has a well-developed porous structure, particularly in mesopore and macropore ranges. Moreover, the specific surface area of carbonized materials prepared from waste newspaper was also investigated. The specific surface area obtained, 418 m^2/g was highest for the sample carbonized at 800 ℃, which was equal to or greater than that of commercially available charcoal. The iodine adsorption number of 581 mg/g was the highest and the rate of adsorption was fastest for the sample carbonized at 800 ℃. However, the humidity control capacity was highest for the material carbonized at 600-800 ℃. Carbonized panels were also prepared from waste phenol-formaldehyde resin and magazine wastepaper by gas phase activation. The modules of elasticity (MOE) was increased with carbonization for raw panels. However, the MOE and modules of rupture (MOR) were decreased with activation. The specific surface area of carbonized panel contain waste phenol resin was 650-760 m^2/g and it suggested that carbonized panels has a well-developed porous structure.