Selective Hydrogenation of Acetylene in the Presence of Ethylene on K+ -beta-Zeolite Supported Pd and PdAg Catalysts

doi:10.1016/j.apcata.2007.09.017

Title: Selective Hydrogenation of Acetylene in the Presence of Ethylene on K+ -beta-Zeolite Supported Pd and PdAg Catalysts

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Abstract

The selective hydrogenation of acetylene in the presence of ethylene has been studied on K+ exchanged {beta}-zeolite supported Pd and PdAg catalysts. Results from batch reactor studies with Fourier transform infrared spectroscopy (FTIR) have shown that the K+-{beta}-zeolite support is more selective than the Al2O3 or Na+-{beta}-zeolite supports toward the hydrogenation of acetylene. The rate and equilibrium constants for Pd/K+-{beta}-zeolite and PdAg/K+-{beta}-zeolite were determined using a Langmuir-Hinshelwood model. The selectivity of the PdAg bimetallic catalyst is twice of that of the Pd catalyst. Results from flow reactor studies show that the PdAg/K+-{beta}-zeolite catalyst has higher selectivity but lower activity toward acetylene hydrogenation than the Pd/K+-{beta}-zeolite catalyst. The selectivity to the undesirable ethane by-product is inhibited on the bimetallic catalyst. Extended X-ray absorption fine structure (EXAFS) studies and transmission electron microscope (TEM) analysis confirm the formation of Pd-Ag bimetallic bonds in the PdAg/K+-{beta}-zeolite catalyst.

Authors:: Huang,W.; Pyrz, W.; Lobo, R.; Chen, J.

Publication Date:: Mon Jan 01 00:00:00 EST 2007

Research Org.:: Brookhaven National Laboratory (BNL) National Synchrotron Light Source

Sponsoring Org.:: Doe - Office Of Science

OSTI Identifier:: 959635

Report Number(s):: BNL-82621-2009-JA
TRN: US201016%%779

DOE Contract Number:: DE-AC02-98CH10886

Resource Type:: Journal Article

Resource Relation:: Journal Name: Applied Catalysis A: General; Journal Volume: 333

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ACETYLENE; BY-PRODUCTS; CATALYSTS; ELECTRON MICROSCOPES; ETHANE; ETHYLENE; FINE STRUCTURE; HYDROGENATION; SPECTROSCOPY; ZEOLITES; national synchrotron light source

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                    Huang,W., Pyrz, W., Lobo, R., and Chen, J.. Selective Hydrogenation of Acetylene in the Presence of Ethylene on K+ -beta-Zeolite Supported Pd and PdAg Catalysts.  United States: N. p., 2007. 
        Web.  doi:10.1016/j.apcata.2007.09.017.

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                    Huang,W., Pyrz, W., Lobo, R., & Chen, J.. Selective Hydrogenation of Acetylene in the Presence of Ethylene on K+ -beta-Zeolite Supported Pd and PdAg Catalysts.  United States.  doi:10.1016/j.apcata.2007.09.017.

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                    Huang,W., Pyrz, W., Lobo, R., and Chen, J.. Mon .  
        "Selective Hydrogenation of Acetylene in the Presence of Ethylene on K+ -beta-Zeolite Supported Pd and PdAg Catalysts".  United States.  
        doi:10.1016/j.apcata.2007.09.017.

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@article{osti_959635,

  title        = {Selective Hydrogenation of Acetylene in the Presence of Ethylene on K+ -beta-Zeolite Supported Pd and PdAg Catalysts},

  author       = {Huang,W. and Pyrz, W. and Lobo, R. and Chen, J.},

  abstractNote = {The selective hydrogenation of acetylene in the presence of ethylene has been studied on K+ exchanged {beta}-zeolite supported Pd and PdAg catalysts. Results from batch reactor studies with Fourier transform infrared spectroscopy (FTIR) have shown that the K+-{beta}-zeolite support is more selective than the Al2O3 or Na+-{beta}-zeolite supports toward the hydrogenation of acetylene. The rate and equilibrium constants for Pd/K+-{beta}-zeolite and PdAg/K+-{beta}-zeolite were determined using a Langmuir-Hinshelwood model. The selectivity of the PdAg bimetallic catalyst is twice of that of the Pd catalyst. Results from flow reactor studies show that the PdAg/K+-{beta}-zeolite catalyst has higher selectivity but lower activity toward acetylene hydrogenation than the Pd/K+-{beta}-zeolite catalyst. The selectivity to the undesirable ethane by-product is inhibited on the bimetallic catalyst. Extended X-ray absorption fine structure (EXAFS) studies and transmission electron microscope (TEM) analysis confirm the formation of Pd-Ag bimetallic bonds in the PdAg/K+-{beta}-zeolite catalyst.},

  doi          = {10.1016/j.apcata.2007.09.017},

  journal      = {Applied Catalysis A: General},

  number       = ,

  volume       = 333,

  place        = {United States},

  year         = {Mon Jan 01 00:00:00 EST 2007},

  month        = {Mon Jan 01 00:00:00 EST 2007}

}

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DOI: 10.1016/j.apcata.2007.09.017

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