文献类型：期刊文献

中文题名：磷酸法玉米秸秆基活性炭的制备及其表征

英文题名：Preparation and Characterization of Corn Straw Based Activated Carbon by Phosphoric Acid Activation

作者：徐茹婷[1,2] 卢辛成[1,2] 许伟[1,2] 王傲[1,2] 孙康[1,2]

第一作者：徐茹婷

机构：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业和草原局林产化学工程重点实验室,江苏省生物质能源与材料重点实验室,江苏南京210042;[2]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037

年份：2022

卷号：56

期号：1

起止页码：1-6

中文期刊名：生物质化学工程

外文期刊名：Biomass Chemical Engineering

基金：国家重点研发计划资助项目(2019YFD1100604)。

语种：中文

中文关键词：玉米秸秆;活性炭;磷酸法;制备

外文关键词：corn straw;activated carbon;phosphoric acid;preparation

分类号：TQ35;TQ424

摘要：以成型、烘焙处理后的玉米秸秆为原料,磷酸作为活化剂制备了玉米秸秆基活性炭,并对活性炭样品进行表征。同时以碘吸附值、亚甲基蓝吸附值和焦糖脱色率为指标测定其吸附性能,并对制备条件进行优化。实验结果表明:玉米秸秆制备活性炭的最佳工艺条件为浸渍比即m(55%H_(3)PO_(4))∶m(玉米秸秆)为4∶1、活化温度400℃、活化时间100 min,此条件下活性炭的得率为47.78%,制得的活性炭具有良好的吸附性能,碘吸附值、亚甲基蓝吸附值及焦糖脱色率分别达到864 mg/g、210 mg/g和100%。活性炭比表面积可达1105 m^(2)/g,总孔容积为0.745 cm^(3)/g,微孔孔容为0.287 cm^(3)/g,中孔孔容为0.354 cm^(3)/g,孔径分布集中于5 nm以内,约占73.56%,平均孔径为2.697 nm。FT-IR分析显示:在活化过程中磷酸与玉米秸秆发生交联作用,生成的活性炭损失了玉米秸秆的部分官能团。
Corn straw based activated carbon was prepared from corn straw after formed and torrefied by H_(3)PO_(4) activation and characterized by N2 adsorption,elemental analysis and FT-IR.The results showed that the optimal conditions were the impregnated ratio of 4∶1,the activation temperature of 400℃and the activation time of 100 min.Under these conditions,the yield of activated carbon was 47.78%and the activated carbon showed excellent adsorption capacity with the iodine adsorption value of 864 mg/g,the methylene blue adsorption of 210 mg/g and the caramel decolorization of 100%.The specific surface area and the total volume of activated carbon reached 1105 m^(2)/g and 0.745 cm^(3)/g,the micropore volume was 0.287 cm^(3)/g,the mesopore volume was 0.354 cm^(3)/g.Meanwhile,the distribution of pore was concentrated within 5 nm,accounting for 73.56%,and the average pore diameter is 2.697 nm.The FT-IR results showed that the crosslinking reaction was occured between H3PO4 and corn straw during octivation and the activated carbon lost some functional groups of corn straw.