Modified Pd catalysts for the selective hydrogenation of acetylene

Woo Jae Kim, Sang Heup Moon

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105 Scopus citations


This article reviews our previous studies to develop high performance catalysts for acetylene hydrogenation. Ethylene selectivity of Pd catalysts in acetylene hydrogenation was improved by adding Si, metal oxides showing SMSI behavior, and either Ag or Cu as promoters. The promoter effect was further enhanced by maximizing the interactions between Pd and added promoters. Chemical vapor deposition was used for the addition of Si, high-temperature reduction for the SMSI metal oxides, and a surface redox (SR) for Ag and Cu. Si modified the Pd surface geometrically, SMSI metal oxides modified Pd both electronically and geometrically, and Ag modified Pd largely electronically. Cu added by SR modified Pd electronically to a small extent, but preferentially decorated the low-coordination sites of Pd such that the ethylene selectivity of the optimum catalyst was significantly promoted from that of Pd, while its activity remained comparable to that of Pd. The sensitivity of ethylene selectivity to the surface structure of Pd was demonstrated using model catalysts containing uniform-sized Pd particles in either cubic or spherical shapes. The three stage deactivation of the Pd catalyst and the self-regenerative behavior in early stages of deactivation were also investigated.

Original languageEnglish
Pages (from-to)2-16
Number of pages15
JournalCatalysis Today
Issue number1
StatePublished - 20 May 2012

Bibliographical note

Funding Information:
This work was supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation Planning (KETEP) grant funded by the Korea Government Ministry of Knowledge Economy (No. 20104010100510 ) and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-0005392 ) (for W.-J.K.); by BASF Aktiengesellschaft , the Brain Korea 21 project, and the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program (for S.H.M.).


  • Acetylene hydrogenation
  • Cu
  • SMSI
  • Selective deposition
  • Si
  • Structure sensitivity


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