Improved selectivity of carbon-supported palladium catalysts for the hydrogenation of acetylene in excess ethylene

Benavidez, Angelica; Burton, Patrick D.; Nogales, Johnny L.; Jenkins, Aaron R.; Ivanov, Sergei A.; Miller, Jeffrey T.; Karim, Ayman M.; Datye, Abhaya K.

doi:10.1016/j.apcata.2014.05.027

Cited by 78 publications

(48 citation statements)

References 35 publications

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“…In contrast Pd/C resulted in an ethylene gain across a wide range of conversion. Based on XANES measurements, the authors suggest that the enhanced selectivity is a result of metal-support interactions between the carbon support and Pd particles [33]. It is also acknowledged that the interaction of Pd and C may influence the ability to form a hydride phase given that the Pd particle size is exceptionally small and this correlates with the report of Boudart and Hwang [35] who reported hydride formation decreases as Pd dispersion approaches 100%.…”

Section: Alternative Catalyst Supportsmentioning

confidence: 76%

“…Two recent studies indicate that the choice of support may influence the performance of very small Pd nanoparticles more significantly. Benavidez et al [33] used solution phase alcohol reduction of Pd(OAc) 2 [34] to produce very small Pd nanoparticles (0.5-1.0 nm) and subsequently deposited them onto carbon, alumina and magnesia as supports (Fig. 3).…”

Section: Alternative Catalyst Supportsmentioning

confidence: 99%

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Recent advances in selective acetylene hydrogenation using palladium containing catalysts

McCue

Anderson

2015

Front. Chem. Sci. Eng.

215

196

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Recent advances with Pd containing catalysts for the selective hydrogenation of acetylene are described. The overview classifies enhancement of catalytic properties for monometallic and bimetallic Pd catalysts. Activity/ selectivity of Pd catalysts can be modified by controlling particle shape/morphology or immobilisation on a support which interacts strongly with Pd particles. In both cases enhanced ethylene selectivity is generally associated with modifying ethylene adsorption strength and/or changes to hydride formation. Inorganic and organic selectivity modifiers (i.e., species adsorbed onto Pd particle surface) have also been shown to enhance ethylene selectivity. Inorganic modifiers such as TiO 2 change Pd ensemble size and modify ethylene adsorption strength whereas organic modifiers such as diphenylsulfide are thought to create a surface template effect which favours acetylene adsorption with respect to ethylene. A number of metals and synthetic approaches have been explored to prepare Pd bimetallic catalysts. Examples where enhanced selectivity is observed are generally associated with decreased Pd ensemble size and/or hindering of the ease with which an unselective hydride phase is formed for Pd. A final class of bimetallic catalysts are discussed where Pd is not thought to be the primary reaction site but merely acts as a site where hydrogen dissociation and spillover occurs onto a second metal (Cu or Au) where the reaction takes place more selectively.

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Section: Alternative Catalyst Supportsmentioning

confidence: 76%

Section: Alternative Catalyst Supportsmentioning

confidence: 99%

Recent advances in selective acetylene hydrogenation using palladium containing catalysts

McCue

Anderson

2015

Front. Chem. Sci. Eng.

215

196

View full text Add to dashboard Cite

show abstract

“…According to the literature [34,35], the component with binding energies (BE) of 335.7−336.0 eV is reasonably assigned to metallic Pd nanoparticles and the other one with BE of 337.0−337.9 eV assigned to PdO x species. The presence of PdC x species is not considered here since the formation of such species is not likely during the mild calcination and reduction process in the present study [12]. For all the Pd/C catalysts, the BE of Pd 3d 5/2 peak for metallic Pd form is larger than that of bulk Pd (usually 335.0 eV), due to the size effect of Pd nanoparticles [34,35].…”

Section: Catalytic Reactionsmentioning

confidence: 99%

Catalytic Performance of Carbon Materials Supported Pd Nanoparticles in Selective Hydrogenation of Acetylene

Yao

Huo

2017

Chinese Journal of Chemical Physics

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Pd/C catalysts were prepared by deposited Pd nanoparticles (NPs) on different carbon supports including activated carbon (AC), graphite oxide (GO), and reduced graphite oxide (rGO) using sol-immobilization method. Through transmission electron microscopy, powder X-ray diffraction, and X-ray photoelectron spectroscopy, the role of the carbon supports for the catalytic performances of Pd/C catalysts was examined in selective hydrogenation of acetylene. The results indicate that Pd/AC exhibited higher activity and selectivity than Pd/GO and Pd/rGO in the gas phase selective hydrogenation of acetylene. Thermal and chemical treatment of AC supports also have some effect on the catalytic performance of Pd/AC catalysts. The differences in the activity and selectivity of various Pd/C catalysts were partly attributed to the metal-support interaction.

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“…[4] As this reaction is also of high interest for basic research, other support materials such as carbon or different oxidess uch as SiO 2 and TiO 2 have been investigated. [5][6][7][8] The activity of elemental Pd catalysts is somewhat high but the selectivity for ethylene is limited to 20 %a t2 00 8C, which is determined by the electronic and geometrics tructure of the catalyst. [9] In such elemental Pd or Pd alloy catalysts, each atom is surrounded by 12 other (Pd) atomsi nt he first coordination shell.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Parameters for the Selective Hydrogenation of Acetylene on GaPd₂ and GaPd

Zimmermann¹,

Hahn

Reschetilowski³

et al. 2017

ChemPhysChem

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Intermetallic GaPd is a highly selective and stable catalyst for the semi-hydrogenation of acetylene. Knowledge of the underlying reaction kinetics is essential to gain a deeper understanding of the selective hydrogenation on this catalytic material. To date, there has been no experimental kinetic data published for this reaction on a well-defined intermetallic catalyst possessing isolated active sites. Kinetic measurements are performed at 140-200 °C, revealing an apparent activation energy of 29(2) kJ mol . GaPd is shown to be the first binary catalyst material, which shows a positive reaction order (0.89) with respect to acetylene at 200 °C. The influences on the extent of acetylene conversion, specific activity and selectivity to ethylene, ethane, and higher hydrocarbons are determined by a 2 factorial experiment following a design of experiments approach. Temperature and pressure have the strongest impact on these values. The results allow optimal operation for achieving high ethylene yields. A comparison of the reaction kinetics on GaPd with experimental results obtained for GaPd reveals different orders of reaction of H and C H on the two compounds.

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Improved selectivity of carbon-supported palladium catalysts for the hydrogenation of acetylene in excess ethylene

Cited by 78 publications

References 35 publications

Recent advances in selective acetylene hydrogenation using palladium containing catalysts

Recent advances in selective acetylene hydrogenation using palladium containing catalysts

Catalytic Performance of Carbon Materials Supported Pd Nanoparticles in Selective Hydrogenation of Acetylene

Kinetic Parameters for the Selective Hydrogenation of Acetylene on GaPd₂ and GaPd

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Improved selectivity of carbon-supported palladium catalysts for the hydrogenation of acetylene in excess ethylene

Cited by 78 publications

References 35 publications

Recent advances in selective acetylene hydrogenation using palladium containing catalysts

Recent advances in selective acetylene hydrogenation using palladium containing catalysts

Catalytic Performance of Carbon Materials Supported Pd Nanoparticles in Selective Hydrogenation of Acetylene

Kinetic Parameters for the Selective Hydrogenation of Acetylene on GaPd2 and GaPd

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Kinetic Parameters for the Selective Hydrogenation of Acetylene on GaPd₂ and GaPd