【摘要】 对球形酚醛树脂制备活性炭的方法进行了优化并探讨了其吸附性能.分别对合成球形酚醛树脂过程中所用原料、转速进行了筛选,优化了由酚醛树脂制备活性炭的炭化和水蒸气活化过程,并考察了活性炭的吸附性能.对吸附性能优异的活性炭进行了氮气吸附-脱附等温线、比表面积及微孔体积的测定.结果表明:苯酚、甲醛和三乙烯四胺为合成球形酚醛树脂的最佳原料,三者的物质的量比为1∶1.13∶0.04.在转速为600r/min时可获得粒径为0.35～0.50mm的球形酚醛树脂.酚醛树脂经过600℃炭化和800℃活化过程制得球形活性炭.活性炭符合IUPAC定义的I型吸附曲线,孔径分布以微孔(0.5～2nm)为主,比表面积可达1 431.89m~2/g,对DL-β氨基异丁酸和α-淀粉酶的吸附效率分别为63.41%和19.77%.更多还原

【Abstract】 The method of preparing activated carbon from spherical phenolic resin is studied and its adsorption performance is discussed.The raw materials and rotational speed used in the synthesis of spherical phenolic resin were first screened.Then,the carbonization and steam activation processes of the activated carbon prepared from phenolic resin were optimized,while adsorption properties of the activated carbon were tested.Furthermore,the adsorption desorption isotherm,specific surface,and micropore volume of activated carbon with excellent adsorption performance were also measured.The results indicated that the best raw materials for synthesizing spherical phenolic resin were phenol,formaldehyde and triethylenetetramine with the molar ratio of 1∶1.13∶0.04.The phenolic resin with particle size between 0.35 mm and 0.50 mm obtained at the optimal speed of 600 r/min.Spherical activated carbon was prepared by carbonization at 600 ℃ and activation of the spherical phenolic resin at 800 ℃.Activated carbon conforms to the type I adsorption curve defined by IUPAC.The pore size distribution was between 0.5 and 2 nm,and the specific surface area reached 1 431.89 m~2/g.The adsorption efficiency of activatedcarbon for DL-β-aminoisobutyric acid andα-amylase was 63.41% and 19.77%,respectively.更多还原