The selective hydrogenation of acetylene on palladium–carbon nanostructured catalysts

Augustyn, Willem G.; McCrindle, Robert; Coville, Neil J.

doi:10.1016/j.apcata.2010.07.038

Cited by 35 publications

(26 citation statements)

References 20 publications

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“…Indeed, we have previously observed that grain boundaries can facilitate H 2 activation/dissociation in partial hydrogenation reactions [31,54]. In addition, subsurface hydrogen, which is known to facilitate over hydrogenation, is more easily formed on Pd (1 0 0) than on Pd (1 1 1) [55][56][57][58][59]. Therefore, the increased ratio of (1 1 1) to (1 0 0) facets in our material could contribute to an enhancement of ethene selectivity.…”

Section: Structure and Morphology Of Pdag Mcsmentioning

confidence: 71%

Fabrication of a PdAg mesocrystal catalyst for the partial hydrogenation of acetylene

Liu

Yang

et al. 2015

Journal of Catalysis

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Section: Structure and Morphology Of Pdag Mcsmentioning

confidence: 71%

Fabrication of a PdAg mesocrystal catalyst for the partial hydrogenation of acetylene

Liu

Yang

et al. 2015

Journal of Catalysis

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“…12, in which t 0 represents the time when the reaction stabilized at this temperature. The unreduced PdAg/NiTi-LDH catalyst exhibited a pronounced deactivation behavior with time-on-stream increasing, while the activity over the reduced PdAg/NiTi-LDH-H 2 -R catalyst maintained an almost stable state in every test point during 48 h. This stable activity can be ascribed to two key factors, one of which was excellent resistibility against carbon deposition which partly suppresses the block of active sites and therefore possesses preferable stability 54 and the other was structural stability of PdAg nanoalloys attributed to the existence of the strong interaction between PdAg nanoalloys and supports.…”

Section: Smsi Effect Of the Reduced Pdag Catalystsmentioning

confidence: 96%

Partial hydrogenation of acetylene over a NiTi-layered double hydroxide supported PdAg catalyst

Liu

Feng

et al. 2015

Catal. Sci. Technol.

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NiTi layered double hydroxide (NiTi-LDH) with rich defective sites was synthesized and used as the support for the preparation of a novel supported PdAg nanoalloys catalyst for the partial hydrogenation of acetylene. The obtained PdAg/NiTi-LDH catalyst exhibited a remarkable catalytic performance. When the conversion of acetylene reached 90%, the selectivity towards ethene maintained 82%. Superior hydrogenation activity was ascribed to two key factors. Small particle size and high dispersion of PdAg nanoparticles were responsible for boosting the catalytic activity. In addition, Ti 3+ defective sites in the support also played an important role on the enhancement of activity. The interface at the Ti 3+ species and active metals acting as new active sites enhanced the activation and dissociation of hydrogen and therefore further improved catalytic activity. Preferable selectivity was assigned to the electronic effect between NiTi-LDH support and PdAg nanoalloys. The electron transfer from the Ti 3+ species to Pd resulted in the increase of electron density and the linearly coordinated sites of Pd and therefore facilitated the desorption of ethene. Moreover, due to the reducibility of NiTi-LDH, the selectivity and stability over reduced PdAg/NiTi-LDH catalyst were further enhanced on account of the strong metal-support interaction.xM 3+ x(OH)2] x+ (A n-)x/n·mH2O. The M 2+ and M 3+ cations are uniformly dispersed within the layers. 14 Owing to the flexibility in composition

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“…В качестве активных компонентов нанесённых катализаторов гидрирования кратных углерод-углеродных связей в промышленности, в основном, используют металлы платиновой группы, нанесённые на α- [42], δ- [43], γ-Al 2 O 3 [44], TiO 2 [45], активированный уголь, SiO 2 [46], цеолиты [47]; реже: CaCO 3 , CeO 2 , BaSO 4 [4], углеродные нанотрубки [48], стекловолокнистые материалы [49] и другие носители. По уменьшению селективности нанесенные платиноиды располагаются в следующем порядке: Pd>Rh≥Pt>Ru>Os>Ir [50], при этом удельная активность нанесенных металлов снижается в ряду: Pd>Pt>Ni>Rh>Cu [4].…”

Section: закономерности протекания каталитического селективного гидриunclassified

Газофазное И Жидкофазное Гидрирование Ацетилена В Обедненных И Обогащенных Смесях На Нанесенных Модифицированных Палладиевых Катализаторах

Глыздова¹,

Смирнова²,

Shlyapin³

et al. 2019

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In the presented review the results of studies devoted to the selective hydrogenation of acetylene to ethylene over bimetallic palladium-containing catalysts are systematized. General regularities and peculiarities of the catalysts action in gas-phase hydrogenation of traces of acetylene in the acetylene-ethylene mixture obtained by pyrolysis of petroleum raw materials, as well as in the process of liquid-phase hydrogenation of mixtures enriched with acetylene and hydrogen are analyzed. The advantages of obtaining ethylene by hydrogenation of acetylene in the liquid phase are shown and ways of increasing the selectivity of this process are considered.

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The selective hydrogenation of acetylene on palladium–carbon nanostructured catalysts

Cited by 35 publications

References 20 publications

Fabrication of a PdAg mesocrystal catalyst for the partial hydrogenation of acetylene

Fabrication of a PdAg mesocrystal catalyst for the partial hydrogenation of acetylene

Partial hydrogenation of acetylene over a NiTi-layered double hydroxide supported PdAg catalyst

Газофазное И Жидкофазное Гидрирование Ацетилена В Обедненных И Обогащенных Смесях На Нанесенных Модифицированных Палладиевых Катализаторах

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