摘要
本文考察了乙腈、硝基甲烷和乙二胺在Pt/HM,Pd/HM和CuO/HM催化剂上氧化降解产物随反应温度的变化.在实验温度范围内,含氮产物有N_2,N_2O和NO_2.随着反应温度的升高,硝基甲烷氧化降解的N_2选择性呈单调下降;而乙腈和乙二胺的N_2选择性出现极小值;高温时N_2选择性升高可能是氧化生成的NO在高温时更有利于和CN基或NH_2基相互反应生成N_2的缘故.对于乙腈和乙二胺的催化氧化降解活性为:Pt/HM>Pd/HM>CuO/HM;对硝基甲烷的降解活性为:Pt/HM>CuO/HM>Pd/HM.而N_2选择性CuO/HM>Pd/HM>Pt/HM.
Products ( CO2, N2, N2O, NO2 ) of oxidation decomposition of acetonitrile, nitromethane and ethylenediamine over Pt/HM,Pd/HM and CuO/HM catalysts at different temperature have been studied. In the experimental temperature range,three nitrogen-containing products (N2,N2O,NO2) were formed. N2 selectivity of the catalyst for nitromethane oxidation was decreased with increasing temperature, but that for both acetonitrile and ethylenediamine oxidation were gone through a minimum. Increase of N2 selectivity at higher temperature is probably due to reaction of NO with CN or NH2 groups. Catalytic activity for acetonitrile and ethylenediamine is in order of Pt/HM>Pd/ HM>CuO/HM,and that for nitromethane is in order of Pt/HM>CuO/HM>Pd/HM. N2 selectivity of catalyst is CuO/HM>Pd/HM>Pt/HM.
出处
《环境化学》
CAS
CSCD
北大核心
1997年第3期204-207,共4页
Environmental Chemistry
基金
浙江省自然科学基金资助课题
关键词
催化剂
乙腈
硝基甲烷
乙二胺
氧化降解
catalyst, acetonitrile, nitromethane, ethylendiamine, oxidation decomposition
