CAJ | 학술논문

以油茶壳醇浸取后残渣为原料,以磷酸活化法制备活性炭,考察了浸渍比、磷酸质量分数和活化温度等对活性炭吸附性能及其得率的影响;活性炭的吸附性能由碘吸附值、亚甲基蓝吸附值表征.结果表明,在酸/炭浸渍比为 3:1、磷酸质量分数 70%、活化温度 500℃时,活性炭的吸附性能最佳,其碘、亚甲基蓝吸附值和得率分别为1043.29mg/g、148.5mg/g和38.77%.采用物理吸附仪在77K下测定其N2吸附脱附等温线,利用BET法和BJH法计算比表面积和孔径分布,其比表面积为1626.45m2/g,平均孔径为4.7nm,总孔容为1.94cm3/g.同时采用FTIR和XRD分析了活性炭的表面官能团和微观结构.
이유다각순침취후잔사위원료,이린산활화법제비활성탄,고찰료침지비、린산질량분수화활화온도등대활성탄흡부성능급기득솔적영향;활성탄적흡부성능유전흡부치、아갑기람흡부치표정.결과표명,재산/탄침지비위 3:1、린산질량분수 70%、활화온도 500℃시,활성탄적흡부성능최가,기전、아갑기람흡부치화득솔분별위1043.29mg/g、148.5mg/g화38.77%.채용물리흡부의재77K하측정기N2흡부탈부등온선,이용BET법화BJH법계산비표면적화공경분포,기비표면적위1626.45m2/g,평균공경위4.7nm,총공용위1.94cm3/g.동시채용FTIR화XRD분석료활성탄적표면관능단화미관결구.
Activated carbons were prepared from camellia oleifera shell residue after alcohol extraction by phosphoric acid. The influences of impregnation ratio,mass fraction of phosphoric acid and activation temperature on the yield of activated carbon and the adsorption capacity were characterized by adsorption iodine value and adsorption methylene blue value,respectively. The results showedthat activated carbon with the optimal adsorption capacity could be prepared at an impregnation ratio of acid/carbon of 3,a phosphoric acid mass fraction of 70% and an activation temperature of 500℃. The adsorption iodine value,adsorption methylene blue value and yield of activated carbon at optimized condition were 1043.29mg/g,148.5mg/g and 38.77%,respectively. Nitrogen adsorption isotherms at 77K of the same activated carbon were measured by physical adsorption instrument. The porous structure was investigated by nitrogen adsorption isotherms on the bases of Brunauer-Emmett-Teller (BET) and Barrett- Joyner-Halenda (BJH) methods. The specific surface area,average pore size and pore volume were 1626.45m2/g,4.7nm and 1.94cm3/g,respectively. Surface functional group and micro-structures of activated carbon with the optimal adsorption capacity were analyzed by Fourier Transform Infrared Spectrometer (FTIR) and X-ray diffraction (XRD).