磷酸活化法制备半纤维素基颗粒活性炭  

Preparation of Hemi-cellulose-based Granular Activated Carbon by Phosphoric Acid Activation

作　　者：林冠烽[1,2,3,4,5,6] 蒋剑春[1,2,3,4] 吴开金[5,6] 

机构地区：[1]中国林业科学研究院林产化学工业研究所 [2]生物质化学利用国家工程实验室 [3]国家林业局林产化学工程重点开放性实验室 [4]江苏省生物质能源与材料重点实验室,江苏南京210042 [5]福建省林业科学研究院 [6]福建省森林培育和林产品加工利用重点实验室,福建福州350012

出　　处：《生物质化学工程》2013年第3期6-10,共5页Biomass Chemical Engineering

基　　金：国家林业局公益性行业专项(201004051);省属公益类科研院所基本科研专项(2011R1013-5);福建省自然科学基金(2011J01286)

摘　　要：以半纤维素的主要模型物木聚糖为原料,在不添加其他粘结剂的条件下,采用磷酸活化法制备半纤维素基颗粒活性炭。讨论了浸渍比和炭活化工艺对活性炭吸附性能和孔隙结构的影响。研究结果表明:浸渍比的增加,有利于颗粒活性炭的比表面积、亚甲基蓝吸附值、强度、总孔容积和中孔容积的提高。随着炭活化温度的升高,颗粒活性炭的碘吸附值、亚甲基蓝吸附值、比表面积、总孔容积和微孔容积呈下降的趋势,强度呈上升趋势。N2吸附-脱附等温线和孔径分析表明,颗粒活性炭具有发达的微孔结构,炭活化温度的升高不利于孔隙结构的发达。Xylan, which is the main model compound of hemi - cellulose, was used to prepare hemi-cellulose-based granular activated carbon by phosphoric acid activation without addition any binder. The effects of impregnation ratio and carbonization/ activation process on the adsorptive properties and porous texture of granular activated carbon were discussed. The result showed that specific surface area （BET） , adsorption capability of methylene blue, intensity, total pore volume and mesopore volume of granular activated carbon increased with impregnation ratio increased. As the increasing of carbonization/activation temperature, the adsorption capability of iodine and methylene blue, BET, total pore volume and mieropore volume of granular activated carbon were decreased,while the intensity was increased. The analysis of N2 adsorption-desorption isotherms and pore size distribution showed that the microporous structure of granular activated carbon was developed, and the increasing of carbonization/activation temperature was not benefit for the development of porous structure.

关 键 词：磷酸活化法 半纤维素 颗粒活性炭 孔结构 

分 类 号：TQ424.1[化学工程]