竹炭粒径对竹活性炭的吸附性能与孔结构的影响  

Effect of Bamboo Carbon Particle Size on Adsorption Property and Pore Struction of Bamboo Activated Carbon

作　　者：庄晓伟[1] 陈顺伟[1] 李良隆 章江丽[1] 潘炘[1] 蒋应梯[1] 

机构地区：[1]浙江省林业科学研究院浙江省森林资源生物与化学利用重点实验室,浙江杭州310023 [2]浙江富来森中竹科技有限公司,浙江丽水323000

出　　处：《生物质化学工程》2011年第3期27-30,共4页Biomass Chemical Engineering

基　　金：浙江省科技厅重大科技专项(2007C12051);国家林业局"948"项目(2006-4-C03)

摘　　要：研究了竹炭粒径对KOH活化法制备的竹活性炭吸附性能和孔结构的影响。结果表明,竹炭粒径0.18～0.27 mm和0.55～0.88 mm时活化得率较高。竹活性炭碘吸附值和亚甲基蓝吸附值都随竹炭粒径的减小而先减小后增大,与活性炭的比表面积BET和总孔容积变化趋势相一致;苯酚吸附值随竹炭粒径的减小而先增大后减小。竹炭粒径对竹活性炭碘吸附值和苯酚吸附值的影响较小,0.11～0.15 mm粒径竹炭制备的活性炭的亚甲基蓝吸附值最大。0.18～0.27 mm和0.55～0.88 mm粒径竹炭制备的活性炭的平均孔径较小,说明0.18～0.88 mm粒径竹炭制备的活性炭的微孔率相对较高,有利于在低分子质量气体吸附方面的应用。因此,竹炭制备高性能活性炭的较佳粒径为0.18～0.88 mm。Bamboo activated carbons were prepared from different bamboo carbon particle size by KOH as activating agent.The influence of the bamboo carbon particle size on adsorption properties and pore struction were investigated.The result showed that the bamboo carbon which particle sizes were 0.18-0.27 mm and 0.55-0.88 mm had the high possessed yield.Adsorption capacity of iodine and methylene blue were first decreasing with the drop of particle size and then increasing with the drop of particle size.That was similar to change of total pore volume and surface area（BET）.Adsorption capacity of phenol were first increasing and then decreasing with the reduction of particle size.Bamboo activated carbons which prepared from 0.11-0.15 mm particle sizes had the highest adsorption capacity of methylene blue.Adsorption capacity of iodine and phenol were slightly affected by bamboo carbon particle size.Bamboo activated carbons which prepared from 0.18-0.27 mm and 0.55-0.88 mm particle sizes had the smaller average pore width.It indicated that bamboo activated carbons which prepared from 0.18-0.88 mm particle sizes had greater microporosity.So the bamboo carbon which particle sizes were 0.18-0.88 mm were suit for high performance bamboo activated carbon.

关 键 词：竹炭粒径 竹活性炭 吸附性能 孔结构 

分 类 号：TQ424.1[化学工程]