硝酸浸渍对活性炭纤维还原NO性能的影响  

EFFECT OF HNO_3 DIPPING ON NO REDUCTION PROPERTIES OVER ACF

作　　者：张守臣[1] 赵修仁[1] 刘长厚[1] 郭世永[2] 陈家骅[2] 

机构地区：[1]大连理工大学化工学院,辽宁大连116012 [2]大连理工大学内燃机研究所,辽宁大连116023

出　　处：《化工学报》2001年第8期690-695,共6页CIESC Journal

基　　金：国家自然科学基金资助项目 (No .5 97760 2 7)

摘　　要：经初步筛选选定以聚丙烯腈为原料加工而成的两种活性炭纤维毡 (ACF) ,研究了其本体和经硝酸浸渍处理后脱除NO的性能 ,表明ACF经硝酸处理后脱除NO的性能有所提高 .在ACF上进行的程序升温脱附试验表明 ,ACF经硝酸浸渍处理后对O2 、CO和NO的吸附性能均强于未处理的 ,唯有CO2 相反 .根据文献与实验现象 ,认为NO在碳纤维上的解离吸附是此反应的控制步骤 ,反应的初级产物为CO2 ,并按一级反应处理 ,得到了NO与碳反应的反应速率与温度的关联式 .研究表明经硝酸浸渍处理后的ACF脱除NO的性能恒优于未处理的 .Two kinds of activated carbon fibers (ACF) made from polyacrylonitrile were selected in order to study their NO reduction properties. Experimental results showed that the NO reduction activity of HNO 3 dipped ACF is higher than that of non-treated one. In order to know the adsorption properties of various oxygen containing gases on ACFs, TPD experiments over ACF showed that the adsorption abilities of CO, NO and O 2 on HNO 3 dipped ACFs are higher than that on non-dipped ACFs, but CO 2 has a reverse result. According to literature and experimental results, we suppose that dissociative adsorption of NO on ACF is the rate controlling step of this reaction, and the primary product of this reaction is carbon dioxide.On the basis of this assumption, a first order kinetic equation was used to treat experimental data, and Arrhenius equations for NO reduction over four different ACFs were obtained.NO reduction activity of HNO 3 dipped ACF was always higher than that of non-dipped one.

关 键 词：活性炭纤维 硝酸 浸渍 NO 程序升温脱附 还原 一氧化氮 机动车 尾气净化 吸附 

分 类 号：X701[环境科学与工程—环境工程]