CAJ | 학술논문

以碱木糖渣为原料,磷酸为活化剂,经预处理后活化,制备高吸附性能活性炭。考察了不同条件对活性炭吸附性能的影响,并结合N2吸附-脱附等温线对其孔结构进行表征。结果表明,当浸渍比为2.0∶1,预处理温度和时间分别为270℃和60 min,活化温度和时间分别为400℃和90 min时,制得的活性炭得率为36.36%,亚甲基蓝吸附值360 mg/g,碘吸附值1142 mg/g,焦糖脱色率120%,比表面积1850.6 m2/g,总孔容积1.48 cm3/g,中孔孔容0.81 cm3/g,平均孔径3.2 nm。
이감목당사위원료,린산위활화제,경예처리후활화,제비고흡부성능활성탄。고찰료불동조건대활성탄흡부성능적영향,병결합N2흡부-탈부등온선대기공결구진행표정。결과표명,당침지비위2.0∶1,예처리온도화시간분별위270℃화60 min,활화온도화시간분별위400℃화90 min시,제득적활성탄득솔위36.36%,아갑기람흡부치360 mg/g,전흡부치1142 mg/g,초당탈색솔120%,비표면적1850.6 m2/g,총공용적1.48 cm3/g,중공공용0.81 cm3/g,평균공경3.2 nm。
Activated carbon with high adsorption performance was prepared from alkali xylose residue by phosphoric acid activation after pretreatment. The effect of different conditions on the adsorption properties of activated carbon was studied and the pore structure was characterized by N2 adsorption-desorption isotherm. The results showed that the optimum conditions for raw material was pre-activated at 270 ℃ for 60 min and then the activated carbon was prepared at the impregnated ratio 2. 0∶1(mass ratio) , activation temperature 400 ℃, and activation duration 90 min. Under these conditions, activated carbon had the yield of 36. 36%, methylene blue value 360 mg/g, iodine value 1 142 mg/g, rate of caramel decolorization 120%, specific surface area 1 850. 6 m2/g, total pore volume 1. 48 cm3/g, mesopores volume 0. 81 cm3/g and average pore diameter 3. 2 nm.