文档介绍：福建农林大学硕士学位论文摘要对磷酸木屑混化料进行低温加热,利用其自身热解过程中产生的焦油作为粘结剂,制得强度较高的颗粒活性炭。本课题对磷酸制备颗粒活性炭的工艺条件、塑化机理等进行了研究,为制备高强度颗粒活性炭提供了科学数据与理论依据。以杉木屑为原料、H3PO。为活化剂,采用单因素分析和正交实验设计法,探讨了影响颗粒活性炭孔隙结构和碘吸附值、亚甲基蓝及强度的各种制备因素,确定了磷酸制备颗粒活性炭的最佳工艺条件:磷酸浓度为70%,浸渍比为1 80%, 捏合温度为170℃,捏合时间为60min,活化温度为350℃,活化时间为210min。,亚甲基蓝吸附值为225mg/g,%,。实验结果表明:浸渍比和炭活化温度对颗粒活性炭吸附性能的影响比较大,而捏合温度与浸渍比对颗粒活性炭强度的影响比较大。由于颗粒活性炭的强度随着浸渍比的提高呈下降的趋势,且下降的幅度较大,因此提出利用复合活化剂方法制备颗粒活性炭。实验结果表明:利用复合活化剂可以降低磷酸与木屑的浸渍比,从而提高颗粒活性炭的强度。同时复合活化剂可以提高颗粒活性炭吸附性能。因此利用此方法可以制得吸附性能好、强度高的颗粒活性炭。对上述所制备的颗粒活性炭,采用比表面积和孔径分布测定仪,,通过BET方程和BJH法计算其比表面积和孔径分布; 并采用扫描电子显微镜和傅立叶转换红外光谱对其形貌特征及化学官能团进行了表征。结果表明:利用复合活化剂制得的颗粒活性炭的比表面积比单一活化剂磷酸制得的颗粒活性炭高,且以微孔为主。不同的复合活化剂可使炭化物表面官能团及其组成结构产生变化,影响颗粒活性炭的吸附性能。扫描电子显微镜观察可知,单一磷酸活化剂活化和复合活化剂活化对产品的外观形貌有着较明显的影响。关键词:磷酸、塑化、活化、颗粒活性炭、复合活化剂福建农林大学硕士学位论文 Abstract Granular activatedcarbons(GACS)with high abrasive resistance were prepared by activation withphosphoric acidusing thetar as abinder which generated by itsown during pyrolysis atlow technologcial conditions and plasticizing mechanism during theprocess were studied to provide scientific data and theoretical basisforthepreparation ofhigh abrasive resistance granular activatedcarbon. TheGACS were prepared fromthe wood method offactoranalysis and theorthogonal design were employed to investigate thepreparation factors,which effect GAC’S on thepore structural characteristics and theadsorption properties of iodinenumber and methylene blue were discussed andtheoptimum process conditions were determined as follow: concentration ofphosphoric acid70%,impregnation ratioof reactive agent todried material (weightbasis)1 80%,temperature of kneading 70℃,time ofkneading 60min,activation temperature 350℃and activation conditions,the obtainedgranular activated carbon hasIodinenumber ,methylene blueadsorption 225 mg/g,abrasive %,BET ,adsorptivecapabil时of GACS Wa