| 原位红外光谱法研究Pd-Ag/Al2O3和Pd/ Al2O3乙炔加氢催化剂 |
| |
| 引用本文： | 张齐,戴伟,穆玮,于海波.原位红外光谱法研究Pd-Ag/Al2O3和Pd/ Al2O3乙炔加氢催化剂[J].化工学报,2011,62(1):71-77. |
| |
| 作者姓名： | 张齐 戴伟 穆玮 于海波 |
| |
| 作者单位： | 中国石油化工股份有限公司北京化工研究院，北京 100013 |
| |
| 摘 要： | 以一氧化碳和乙炔为探针分子，采用原位红外光谱技术研究了Pd-Ag/ Al2O3和Pd/ Al2O3催化剂上乙炔加氢反应以及催化剂本身的表面形态，动态考察了乙炔加氢的气相反应行为、CO吸附以及催化剂表面吸附物种的变化。结果表明，在Pd-Ag/ Al2O3催化体系中，由于Ag的加入而受到几何效应和电子效应的共同影响，引起了催化剂表面形态的改变从而改变了催化剂的性能。另外，乙炔加氢反应会导致钯催化剂表面形成由长分子链的饱和烃组成的碳氢化合物层，该碳氢化合物层有可能是加氢反应形成的绿油。
|
| 关 键 词： | 原位红外光谱 乙炔 加氢 金属催化剂 钯 |
Pd-Ag/Al2O3 and Pd/Al2O3 catalysts for selective hydrogenation of ethyne with in-situ DRIFTS |
| |
| ZHANG Qi,DAI Wei,MU Wei,YU Haibo.Pd-Ag/Al2O3 and Pd/Al2O3 catalysts for selective hydrogenation of ethyne with in-situ DRIFTS[J].Journal of Chemical Industry and Engineering(China),2011,62(1):71-77. |
| |
| Authors: | ZHANG Qi DAI Wei MU Wei YU Haibo |
| |
| Abstract: | Using carbon monoxide and acetylene as probe molecule, their adsorption and acetylene hydrogenation on Pd-Ag/ Al2O3 and Pd/ Al2O3 catalysts were studied by in-situ DRIFTS.Hydrogenation of acetylene and CO chemisorptions properties over surface of catalysts were investigated.The results showed that the catalyst surface state and its properties were changed by addition of Ag into Pd/ Al2O3 due to both geometric and electronic effects.During adsorption and hydrogenation of acetylene, formation of carbonaceous layer that may become green oil and have great effect on the reaction selectivity to ethylene, was observed on catalyst surface.From the infrared spectra, long-chain alkane was tentatively identified as being present in the carbonaceous layer. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载全文 |
