CAJ | 학술논문

以微晶纤维素为原料,在不添加黏结剂的条件下,采用磷酸活化法制备纤维素基颗粒活性炭。分析了捏合过程和炭活化工艺对活性炭耐磨强度、吸附性能和孔隙结构的影响。研究结果表明,炭活化温度的升高及保温时间的延长有利于颗粒活性炭强度的提高；随着浸渍比值的升高,颗粒活性炭的碘吸附值、亚甲基蓝吸附值、比表面积、总孔容积、微孔容积和中孔容积均呈不断上升的趋势；浸渍比值较小,较细微孔结构发达,浸渍比值较大,较大微孔结构发达。在较佳的工艺条件下：捏合温度150℃,浸渍比值1.25,捏合时间55 min,炭活化温度450℃和保温时间1.0 h,制得颗粒活性炭的碘吸附值、亚甲基蓝吸附值、强度、比表面积、总孔容积、微孔容积、中孔容积和平均孔径分别为896.6 mg/g、131.3 mg/g、94.69%、1377.3 m2/g、1.083 cm3/g、0.514 cm3/g、0.569 cm3/g和3.14 nm。
이미정섬유소위원료,재불첨가점결제적조건하,채용린산활화법제비섬유소기과립활성탄。분석료날합과정화탄활화공예대활성탄내마강도、흡부성능화공극결구적영향。연구결과표명,탄활화온도적승고급보온시간적연장유리우과립활성탄강도적제고；수착침지비치적승고,과립활성탄적전흡부치、아갑기람흡부치、비표면적、총공용적、미공용적화중공용적균정불단상승적추세；침지비치교소,교세미공결구발체,침지비치교대,교대미공결구발체。재교가적공예조건하：날합온도150℃,침지비치1.25,날합시간55 min,탄활화온도450℃화보온시간1.0 h,제득과립활성탄적전흡부치、아갑기람흡부치、강도、비표면적、총공용적、미공용적、중공용적화평균공경분별위896.6 mg/g、131.3 mg/g、94.69%、1377.3 m2/g、1.083 cm3/g、0.514 cm3/g、0.569 cm3/g화3.14 nm。
Microcrystalline cellulose was used to prepare cellulose-based granular activated carbon by phosphoric acid activation without any other binder. The effect of kneading and carbonization/activation process on abrasion strenth, adsorptive properties and porous texture of granular activated carbon was discussed. The results showed that both increasing temperature and prolonging holding time of carbonization/activation were beneficial for abrasion strength improvement. Besides, the adsorption capability of iodine and methylene blue,the special surface area( BET) ,total pore volume,micropore volume and mesopore volume for granular activated carbon increased with the increasing impregnation ratio. When the impregnation ratio was low,the smaller microporous structure was developed. On the other side, when the impregnation ratio was increased, the bigger microporous structure was enlarged. Under the optimized condition,i. e. kneading temperature 150 ℃, kneading time 55 min, impregnation ratio 1. 25, carbonization/activation temperature 450 ℃ and holding time 1. 0 h, the iodine adsorption value, methylene blue adsorption value, abrasion strength,BET,total pore volume,microporous volume, mesoporous volume and average pore width of the sample were 896. 6 mg/g, 131. 3 mg/g, 94. 69 %, 1 377. 3 m2/g, 1. 083 cm3/g, 0. 514 cm3/g, 0. 569 cm3/g and 3. 14 nm, respectively.