Pd-Ag/ Al2O3 and Pd/ Al2O3 catalysts for selective hydrogenation of ethyne with in-situ DRIFTS

ZHANG Qi; DAI Wei; MU Wei; YU Haibo

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Pd-Ag/ Al₂O₃ and Pd/ Al₂O₃ catalysts for selective hydrogenation of ethyne with in-situ DRIFTS

更新时间：2025-12-10

- Pd-Ag/ Al₂O₃ and Pd/ Al₂O₃ catalysts for selective hydrogenation of ethyne with in-situ DRIFTS
- CIESC Journal Issue 1, Pages: 71-77(2011)
- 作者机构：
  
  中国石油化工股份有限公司北京化工研究院,北京,100013
- 作者简介：
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- Online First：05 January 2011，
  
  Published：05 January 2011
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ZHANG Qi, DAI Wei, MU Wei, et al. Pd-Ag/ Al₂O₃ and Pd/ Al₂O₃ catalysts for selective hydrogenation of ethyne with in-situ DRIFTS[J]. CIESC Journal, 2011, (1): 71-77.
DOI：

ZHANG Qi, DAI Wei, MU Wei, et al. Pd-Ag/ Al₂O₃ and Pd/ Al₂O₃ catalysts for selective hydrogenation of ethyne with in-situ DRIFTS[J]. CIESC Journal, 2011, (1): 71-77. DOI：

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。

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.

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