摘要
基于碱/尿素体系的纤维素大分子溶解机理,以杉木屑为原料制备自黏结颗粒活性炭;讨论了不同活化温度、碱/尿素比例和有无冷冻条件对颗粒活性炭耐磨强度和吸附性能的影响。结果表明:随着活化温度升高,活性炭的耐磨强度和吸附性能逐渐提高;在碱和尿素的共同作用下,冷冻有利于促进活性炭孔隙结构发达,吸附性能提高。在活化温度900℃、碱/尿素质量比14∶36且冷冻12 h的最佳条件下,颗粒活性炭的耐磨强度、碘吸附值、亚甲基蓝吸附值、比表面积、总孔容积和平均孔径分别为99.12%、1204 mg/g、232 mg/g、1365 m2/g、0.86 cm3/g和2.46 nm。
Based on the dissolution mechanism of cellulose macromolecules in alkali/urea system,self-bonding granular activated carbon was prepared with Chinese fir as raw material.The effects of different activation temperature,alkali/urea ratio and freezing conditions on the abrasion resistance and adsorption performance of granular activated carbon were discussed.The results showed that as the activation temperature increased the abrasion resistance and adsorption performance of activated carbon increased.Under the combination effect of alkali and urea,freezing process was beneficial to promote the development of activated carbon pore structure and improve the adsorption performance.Under the optimal conditions of the activation temperature 900℃,the alkali/urea mass ratio 14∶36 and freezing time for 12 h,the abrasion resistance,iodine adsorption value,methylene blue adsorption value,specific surface area,total pore volume and average pore diameter of granular activated carbon were 99.12%,1204 mg/g,232 mg/g,1365 m2/g,0.86 cm3/g,and 2.46 nm.
作者
杨旋
何晨露
熊永志
林冠烽
陈燕丹
黄彪
YANG Xuan;HE Chenlu;XIONG Yongzhi;LIN Guanfeng;CHEN Yandan;HUANG Biao(College of Material Engineering,Fujian Agriculture and Forestry University, Fuzhou 350002, China;Jinshan College,Fujian Agriculture and Forestry University, Fuzhou 350002, China)
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2020年第3期130-134,共5页
Chemistry and Industry of Forest Products
基金
国家重点研发计划资助项目(2017YFD0601006)
国家自然科学基金资助项目(31770611)
福建省科技计划资助项目(2017N5001)。
关键词
碱/尿素体系
耐磨强度
吸附性能
孔隙结构
alkali/urea system
abrasion resistance
adsorption performance
pore structure
