作　　者： ;

机构地区： 河池学院化学与生命科学系

出　　处： 《化工进展》 2011年第7期1478-1481,1590,共5页

摘　　要： 简述了不同反应物组合在碳材料表面的行为特征,单组分NO可以形成吸附态的NO2、二聚体(NO)2、—NO2或吡啶类的化合物;O2存在时NO被吸附态的氧氧化成NO2;NO、O2和NH3同时存在时,反应发生在吸附态的NH3和吸附态的NO2之间。着重详述了活性碳纤维(activated carbon fibers,ACF)催化剂上的选择性催化还原(selective catalytic reduction,SCR)NO的机理为:低温时以NH3为还原剂的SCR(NH3-SCR)遵循Langmuir-Hinshelwood机理,较高温度时NH3-SCR遵循Eley-Rideal机理;分析指出了催化剂孔结构特征和表面化学官能团是ACF能低温选择性催化还原NO的主要影响因素。 The behavior of the reactant molecules on carbon materials surface,formation of adsorbed NO2,dimer（NO）2,-NO2 or pyridine compounds from single component NO is reviewed.When NO and O2 coexists,NO is oxidized to NO2 by the adsorbed O2.When NO,O2 and NH3 coexists,the reaction occurs between adsorbed NH3 and adsorbed NO2.The mechanism of selective catalytic reduction（SCR）of NO on activated carbon fibers（ACF）catalyst is presented as follows.At a low temperature NH3-SCR follows the Langmuir-Hinshelwood mechanism.While at a high temperature NH3-SCR follows the Eley-Rideal mechanism.The catalyst pore structure characteristics and surface chemical functional groups are the main factors of the low temperature SCR of NO.

关 键 词： 碳材料 活性碳纤维 反应机理 选择性催化还原

领　　域： [化学工程]