CAJ | 학술논문

以木质素为制备原料，采用 KOH 为活化剂制备高比表面积活性炭．通过探究不同活化温度、活化剂与木质素质量比、活化时间对活性炭孔隙结构的影响，优化木质素活性炭的制备工艺．采用 BET、SEM、FTIR 等手段对活性炭性能进行表征．实验结果表明，最佳制备工况为 KOH/木质素质量比为3∶1，活化时间1,h，活化温度为750,℃．其中，KOH/木质素质量比对焦炭孔隙结构影响最大，活化温度次之，活化时间影响最小．制备的活性炭比表面积最高可达2,684,m2/g，孔径分布以中微孔居多，表面含有-OH、-C＝O等基团．
이목질소위제비원료，채용 KOH 위활화제제비고비표면적활성탄．통과탐구불동활화온도、활화제여목질소질량비、활화시간대활성탄공극결구적영향，우화목질소활성탄적제비공예．채용 BET、SEM、FTIR 등수단대활성탄성능진행표정．실험결과표명，최가제비공황위 KOH/목질소질량비위3∶1，활화시간1,h，활화온도위750,℃．기중，KOH/목질소질량비대초탄공극결구영향최대，활화온도차지，활화시간영향최소．제비적활성탄비표면적최고가체2,684,m2/g，공경분포이중미공거다，표면함유-OH、-C＝O등기단．
Activated carbon(AC)with high specific surface area was prepared from alkali lignin by chemical activation with KOH and its characteristics were investigated.The activation processes were conducted at various temperatures(T, 600-900 ℃),KOH/lignin mass ratios(R,1∶1-4∶1),activation times(t,1-3,h).Both scanning electron micros-copy(SEM)and nitrogen adsorption isotherm as Brunauer-Emmett-Teller(BET)were used to identify the structural charac-teristics of the tested AC,and Fourier transform infrared spectroscopy(FT-IR)method was applied to analyze surface func-tional groups.Under experimental conditions,the optimum condition for preparing high specific surface AC of 2 684,m2/g was R=3∶1,T=750,℃,t=1,h.The results showed that R was the critical factor influencing the BET specific surface area compared with T and t.Pore distribution of the prepared AC mainly concentrated on micropores and mesopores.Chemical groups such as -OH and -C=O were characterized by FT-IR.