氯化锌活化南方针叶材和北方阔叶材制备活性炭的研究  

Study on Activated Carbons from the Coniferous Wood in the South China and the Broad-leaved Wood in the North China by ZnCl_2 Activation

作　　者：龚建平[1] 林木森[2] 张燕萍[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,国家林业局林产化学工程重点开放性实验室,江苏南京210042 [2]南京化工职业技术学院,江苏南京210048

出　　处：《生物质化学工程》2008年第5期30-32,共3页Biomass Chemical Engineering

摘　　要：采集了中国南方的两种针叶材杉木、马尾松和北方的两种阔叶材泡桐、杨木为原料,以氯化锌为活化剂,用不同的工艺制取活性炭。氯化锌的波美度分别为45、48、53Be°,活化终点温度为650℃,活化时间2 h。对制取的活性炭进行了活性炭得率和灰分以及焦糖脱色率、亚甲基蓝脱色力、碘吸附值和木糖、乳酸、胱氨酸、DOP脱色率的检测分析。结果显示,南方针叶材制取的活性炭大孔隙发达,吸附大分子色素能力强,得率高,灰分低;北方阔叶材制取的活性炭小孔隙发达,对小分子色素吸附力强,得率低,灰分高。由于南方针叶材和北方阔叶材制取的活性炭脱色性能有较大的差别,因而制造工艺需有所不同。Activated carbons were prepared from the coniferous wood in the South China （ China fir and mason pine） and the broad-leaved wood in the North China （paulownia and polar）, respectively, using zinc chloride as activating agent. The Baume degree of zinc chloride is 45, 48, 53 for impregnation. The end activation temperature is 650 ℃. The activated time is 2 h. The adsorption capacity of the resultant activated carbons was analyzed by measuring methylene blue decolorization, caramel adsorption, iodine adsorption value, xylose decolorization, lactic acid decolorization, cystine decolorization and DOP decolorization. Yield and ash content were also analyzed . The activated carbons prepared from the South China woods have the rich macropores, the strong absorbtion ability to large coloring matter molecules, high yield and low ash content. The activated carbons prepared from the North China woods have the rich mircopores, the strong absorbtion ability to small coloring matter molecules, low yield and high ash content. Since the activated carbons made from coniferous wood in South China and the broad-leaved wood in North China have great differences in decoloring ability, their preparing process should be different.

关 键 词：针叶材 阔叶材 氯化锌 活性炭 

分 类 号：TQ424.14[化学工程]