磷酸法竹质颗粒活性炭的制备研究  

Study on Preparation of Granular Activated Carbon from Bamboo Sawdust Activated with H_3PO_4

作　　者：王志高[1,2] 蒋剑春[1,2] 邓先伦[1,2] 常侠[1,2] 童娅娟[1,2] 刘汉超[1,2] 

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

出　　处：《林产化学与工业》2007年第2期36-40,共5页Chemistry and Industry of Forest Products

基　　金：国家"十五"科技攻关项目资助(2004BA506B0402)

摘　　要：以竹屑为原料,采用磷酸法活化,制得了中微孔发达的颗粒活性炭:A法焦糖脱色率70%,亚甲基蓝吸附值210mg/g,碘吸附值1100mg/g以上,丁烷工作容量132g/L,强度95%以上。其孔分布以中微孔为主(Rn<2.6nm),达到了86.3%。适合于液体脱色精制和汽油蒸气的回收之用。对制备过程中捏合温度和时间、捏合过程中有无空气参与反应以及活化温度等工艺对颗粒活性炭性能的影响进行了研究考察,发现捏合过程中空气参与反应有利于造就发达的中微孔结构,活化温度的提高(>500℃)使得孔分布向着微孔方向发展。并通过改进捏合工艺和添加催化剂,使得颗粒活性炭的性能和表观光洁度得到提高。Granular activated carbon （GAC） was made from bamboo sawdust by activation with H3PQ. The properties of the product are： decolorization of caramel A 70 % ; methylene blue adsorption 210 mg/g; iodine number 〉 1 100 mg/g, n-butane working capacity （BWC） 132 g/L; abrasive resistance 〉 95 %. It exhibits a high percentage of microporosity and mesoporosity （ Rn 〈 2.6 nm）, amounting to 86.3 %, which can be applied to decolorize and refine liquid, and recover gasoline vapor. Effects of affecting factors in preparing process, such as temperature and time of kneading, with or without air participation during kneading, and activation temperature on the properties were investigated. It was found that air participation in reaction during kneading contributes greatly to create a high percentage of microporosity and mesoporosity, and increased activation temperature （ 〉 500℃ ） can lead to develop micropores. Moreover, with improvement on kneading and adoption of catalysts, both properties and surface smoothness of GAC were improved greatly.

关 键 词：竹屑 颗粒活性炭 脱色 汽油蒸气 

分 类 号：TQ424.19[化学工程]