甲醇燃料车尾气净化催化剂的研究Ⅰ.甲醇深度氧化用钯催化剂上吸附物种的原位红外研究  

STUDY ON CATALYSTS FOR METHANOLFUELED VEHICLE EXHAUST CONTROL Ⅰ Investigation of Adsorbent Species on Pd/γAl 2O 3 by InSitu FTIR

作　　者：朱兵[1] 汪仁[1] 

机构地区：[1]华东理工大学工业催化研究所

出　　处：《燃料化学学报》1997年第5期445-448,共4页Journal of Fuel Chemistry and Technology

基　　金：国家教委博士点基金

摘　　要：利用原位红外技术研究了ＣＨ３ＯＨ、ＣＯ、Ｏ２等在Ｐｄ／γＡｌ２Ｏ３上的吸附情况及ＣＨ３ＯＨ和Ｏ２共吸附时表面物种的变化，结果表明：表面纯净的Ｐｄ／γＡｌ２Ｏ３催化剂对甲醇具有很好的解离吸附性能，在无氧条件下，ＣＨ３ＯＨ可在其上脱氢产生ＨＣＨＯ及ＣＯ。Ｐｄ对Ｏ２的吸附力强，氧均以解离方式吸附于Ｐｄ／γＡｌ２Ｏ３上。当吸附的［ＣＨ３Ｏ］与［Ｏ］在Ｐｄ／γＡｌ２Ｏ３上相互作用时，可产生ＨＣＨＯ、ＣＯ、甲二氧基。By insitu FTIR technique, methanol adsorption and oxidation on Pd/γAl 2O 3 catalysts for methanol deep oxidation have been studied It was found that the clear Pd surface can dissociatively adsorb CH 3OH, and in the absence of oxygen, CH 3OH can be transformed to HCHO and CO through dehydrogen on Pd/γAl 2O 3 When the surface of Pd/γAl 2O 3 exist preadsorbent oxygen, during the temperatureprogrammed methanol oxidation, there are adsorbent formaldehyde (2790, 2724, 1760cm 1 ), dioxymethylene (1122, 1085, 922cm 1 ) and formate species (1602, 1584, 1391cm 1 ) on the catalyst surface In addition, both CO and O 2 are strongly adsorbed on the catalyst surface by palladium

关 键 词：甲醇 燃料 钯催化剂 尾气 净化 汽车 催化剂 

分 类 号：TE624.99[石油与天然气工程—油气加工工程] TE626.23