氯化锌活化棉纤维制备成型活性炭工艺研究
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摘要
以棉纤维为原料,采用氯化锌为活化剂,通过自粘结成型法制备成型活性炭,考察锌料比、活化温度和成型压强对活性炭性能的影响。结果表明,其最佳制备条件为:锌料比为1∶1.5,活化温度600℃和成型压强10 MPa。成型活性炭含有丰富的官能团,微观结构以微孔为主,比表面积为1 743 m~2/g,平均孔径为2.17 nm,下落强度为59%,碘吸附值为1 838.8 mg/g,亚甲基蓝的吸附值为398 mg/g,达到了国家一级活性炭标准。
The activated carbon was prepared by zinc chloride method with cotton fiber as raw material.The effects of zinc ratio,activation temperature and molding pressure on the performance of activated carbon were investigated.The result showed that the best preparation conditions were as follows:zinc material ratio was 1∶1.5,activation temperature was 600 ℃ and molding pressure was 10 MPa,the falling strength is 59%,the iodine adsorption value is 1 838.8 mg/g,and the adsorption value of methylene blue is 398 mg/g,which has reached the national level activated carbon standard.The specific surface area is 1 743 m~2/g,the average pore diameter of 2.17 nm.
The activated carbon was prepared by zinc chloride method with cotton fiber as raw material.The effects of zinc ratio,activation temperature and molding pressure on the performance of activated carbon were investigated.The result showed that the best preparation conditions were as follows:zinc material ratio was 1∶1.5,activation temperature was 600 ℃ and molding pressure was 10 MPa,the falling strength is 59%,the iodine adsorption value is 1 838.8 mg/g,and the adsorption value of methylene blue is 398 mg/g,which has reached the national level activated carbon standard.The specific surface area is 1 743 m~2/g,the average pore diameter of 2.17 nm.
引文
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[15] 邢献军,孙宗康,马培勇,等.干法制备生物质成型活性炭工艺研究[J].太阳能学报,2017,38(6):1539-1545.
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[2] 甘琦.农业废弃物秸秆制备成型活性炭的研究[D].上海:上海交通大学,2006.
[3] González-García P.Activated carbon from lignocellulosics precursors:A review of the synthesis methods,characterization techniques and applications[J].Renewable and Sustainable Energy Reviews,2018,82(1):1393-1414.
[4] 刘理根.板栗壳活性炭的制备方法[J].湖北农业科学,2008,47(3):337-339.
[5] 李春阳,张利波,夏洪应,等.H3PO4活化紫茎泽兰制备活性炭及其性能研究[J].材料导报,2016,30(14):49-52.
[6] 刘晓红,王省伟.核桃果皮基活性炭的氯化锌活化制备及工艺优化[J].光谱学与光谱分析,2014,34 (12):3350-3353.
[7] 冯云晓.花生壳活性炭的制备及其对亚甲基蓝吸附效果研究[J].化学研究与应用,2014(7):1107-1111.
[8] 王湖坤.核桃壳质活性炭的制备及处理印染废水的研究[J].印染助剂,2008,25(8):13-15.
[9] 朱玲.氯化锌法制备山核桃壳-玉米秸秆混合基活性炭[J].科学技术与工程,2017(23):115-121.
[10] 卢辛成.氯化锌法制备杉木屑活性炭的研究[J].林产化学与工业,2013,33(3):59-63.
[11] 左秀凤.氯化锌活化稻壳制备活性炭的研究[J].粮食与饲料工业,2005(12):5-7.
[12] Jagiello J,Thommes M.Comparison of DFT characterization methods based on N2,Ar,CO2,and H2 adsorption applied to carbons with various pore size distributions[J].Carbon,2004,42(7):1227-1232.
[13] Landers J,Gor G Y,Neimark A V.Density functional theory methods for characterization of porous materials[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2013,437(20):3-32.
[14] 张本镔,刘运权,叶跃元,等.活性炭制备及其活化机理研究进展[J].现代化工,2014,34(3):34-39.
[15] 邢献军,孙宗康,马培勇,等.干法制备生物质成型活性炭工艺研究[J].太阳能学报,2017,38(6):1539-1545.
[16] 许巧丽,王淑花,李芬,等.废旧棉织物活性炭的制备与性能[J].纺织学报,2015,36(10):73-79.