CAJ | 학술논문

活性炭纤维（activated carbon fiber,ACF）具有很高的比表面积和良好的孔结构,孔径分布较窄。为进一步提高活性碳纤维的脱硝性能,并揭示脱硝机制,采用H2O2,KMnO4/NaOH,NaClO/KOH对ACF进行改性处理,用于燃煤污染物NO的脱除。经过改性处理后,ACF的比表面积和孔容都有不同程度的下降,平均孔径有一定的增大。经X射线光电子能谱法分析表面官能团发现,经过改性处理后ACF表面各类含氧官能团有一定的增加。实验分析了改性ACF对NO的脱除机制,认为脱除机制是由以物理吸附为主的初期阶段和以化学吸附氧化为主的后期阶段构成,且化学吸附阶段,ACF表面化学官能团的催化氧化作用使NO氧化为中间产物NO2,提高了NO脱除效果。结果表明,用摩尔浓度比为0.03 0.1的KMnO4/NaOH对活性炭进行氧化改性可以获得最佳的NO脱除效果。
활성탄섬유（activated carbon fiber,ACF）구유흔고적비표면적화량호적공결구,공경분포교착。위진일보제고활성탄섬유적탈초성능,병게시탈초궤제,채용H2O2,KMnO4/NaOH,NaClO/KOH대ACF진행개성처리,용우연매오염물NO적탈제。경과개성처리후,ACF적비표면적화공용도유불동정도적하강,평균공경유일정적증대。경X사선광전자능보법분석표면관능단발현,경과개성처리후ACF표면각류함양관능단유일정적증가。실험분석료개성ACF대NO적탈제궤제,인위탈제궤제시유이물리흡부위주적초기계단화이화학흡부양화위주적후기계단구성,차화학흡부계단,ACF표면화학관능단적최화양화작용사NO양화위중간산물NO2,제고료NO탈제효과。결과표명,용마이농도비위0.03 0.1적KMnO4/NaOH대활성탄진행양화개성가이획득최가적NO탈제효과。
Activated carbon fiber（ACF） has high specific surface area,good pore structure and narrow pore size distribution.To increase the denitration efficiency,ACF was modified with H2O2,KMnO4/NaOH and NaClO/KOH.It is found that the specific surface area and pore volume decrease at different degrees,while the average pore diameter increases after modification.X-ray photoelectron spectrometry（XPS） analysis indicates that all kinds of oxygenous groups on the surface of the modified ACFs increase to a certain extent.The removal mechanism of NO by the modified ACFs includes the early stage dominated by physical adsorption and the following stage dominated by chemical adsorption and oxidation.During the chemical adsorption,NO is oxidized into NO2 by the catalytic functional groups on the surface of ACF,which accelerates the removal of NO.The results demonstrate that ACF modified by KMnO4/NaOH with the molar concentration ratio of 0.03 0.1 gain the best performance in NO capture.