活性炭表面含氧基团对NO的还原作用

通过Ｃ、Ｈ、Ｎ元素分析和Ｂｏｅｈｍ滴定及ＮＨ３－ＴＰＤ实验揭示了活性炭表面含氧基团数量及分布情况，结果表明，表面含量基团数量和分布决定了活性炭自身还原性及对ＮＯ的还原能力，活性炭表面含氧基团，特别是－ＣＯＯ基团，可能是最重要的ＮＯ还原反应活性中心，提出了该还原反应的机理。

NO Reduction by Surface Oxygen-Containing Groups on Active Carbons

Four kinds of active carbons(AC) were investigated,which were made of coconut shell(CS),hawthorn nut (HN), mountain peach nut(PN)and coal(C),respectively.Elementary analyses showed that HNAC and PNAC were rich in oxygen-containing,however it was few in CSAC and CAC. Oxygen-containing groups,especially carboxyl groups on active carbons were found to have a great influence on the reducibilities of active carbons. And yet,the carboxyl groups were abundant on HNAC and PNAC,but scarce on CSAC and CAC illustrated by Boehm's titration and NH_3-TPD,Meanwhile,HNAC and PNAC also exhibited much better performance on NO reduction than CSAC and CAC.This revealed that oxygencontaining groups indeed acted as the reactive centers of NO reduction,especially-COOwas the most important.The reaction mechanism of NO reduction was thus proposed.