Gas-Phase and Liquid-Phase Hydrogenation of Acetylene in Lean and Enriched Mixtures over Supported Modified Palladium Catalysts

Глыздова, Д. В.; Смирнова, Н. С.; Shlyapin, D. A.; Цырульников, П. Г.

doi:10.1134/s1070363220060298

Cited by 17 publications

(12 citation statements)

References 121 publications

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“…Ethylene is one of the most important and largest bulk chemicals in volume in the chemical industry, which is mainly used in the large-scale production of polyethylene (PE), polyvinyl chloride (PVC), ethylene oxide/ethylene glycol(EO/EG), ethylbenzene, ethanol, vinyl acetate, acetaldehyde and other chemical substances [ 1 , 2 ]. Therefore, the global production volume of ethylene production has reached more than 210 Mt in 2021 alone, which is expected to grow even further at a rate of more than 3% with the increasing demand for the downstream derivatives of ethylene [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Synthetic Strategies of Supported Pd-Based Bimetallic Catalysts for Selective Semi-Hydrogenation of Acetylene: A Review and Perspectives

Cao

Jang

et al. 2023

Molecules

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Selective semi-hydrogenation of acetylene is an extremely important reaction from both industrial and theoretical perspectives. Palladium, due to its unique chemical and physical properties, is the most active and currently irreplaceable metal for this reaction in industry, but the poor catalytic selectivity towards ethylene is also its inherent shortcoming. Introducing a secondary metal to tune a geometric and electronic structures of Pd nanoparticles and to create a synergistic effect is the most widely used strategy to effectively improve the overall catalytic performance of Pd-based catalysts. Thus, various supported Pd-based bimetallic catalysts for selective semi-hydrogenation of acetylene have been exploited in the past decade. Timely comparison, analysis, and summarizing of various preparation methods may offer a beneficial reference for the subsequent development of such catalysts. In this context, herein, the advances in synthesis strategies of catalysts, including nano-catalysts, single atom alloys (SAAs), as well as bimetallic dual atom catalysts are summarized systematically. Their advantages and disadvantages are comparatively discussed. Finally, future perspectives for the synthetic strategies of supported Pd-based bimetallic catalysts for selective semi-hydrogenation of acetylene are proposed.

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Section: Introductionmentioning

confidence: 99%

Synthetic Strategies of Supported Pd-Based Bimetallic Catalysts for Selective Semi-Hydrogenation of Acetylene: A Review and Perspectives

Cao

Jang

et al. 2023

Molecules

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“…Herein reaction turnover numbers (TON) reached 2,700,000, while turnover frequencies (TOF) exceeding 28,000 h −1 [ 186 , 188 ]. Moreover, bi- and polymetallic catalysts, both metal complex [ 109 ] and nanoparticle [ 131 , 159 , 160 , 163 , 164 , 166 , 170 , 183 , 203 ], exhibited the enhanced efficiency due to the metal synergism and changed electron properties and geometry of nanoparticles, clusters, and complexes [ 10 , 62 , 109 , 115 , 164 , 183 , 203 , 208 , 209 , 210 , 211 , 212 , 213 ].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Dendrimer-Based Catalysts

2022

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The present review compiles the advances in the dendritic catalysis within the last two decades, in particular concerning heterogeneous dendrimer-based catalysts and their and application in various processes, such as hydrogenation, oxidation, cross-coupling reactions, etc. There are considered three main approaches to the synthesis of immobilized heterogeneous dendrimer-based catalysts: (1) impregnation/adsorption on silica or carbon carriers; (2) dendrimer covalent grafting to various supports (silica, polystyrene, carbon nanotubes, porous aromatic frameworks, etc.), which may be performed in a divergent (as a gradual dendron growth on the support) or convergent way (as a grafting of whole dendrimer to the support); and (3) dendrimer cross-linking, using transition metal ions (resulting in coordination polymer networks) or bifunctional organic linkers, whose size, polarity, and rigidity define the properties of the resulted material. Additionally, magnetically separable dendritic catalysts, which can be synthesized using the three above-mentioned approaches, are also considered. Dendritic catalysts, synthesized in such ways, can be stored as powders and be easily separated from the reaction medium by filtration/centrifugation as traditional heterogeneous catalysts, maintaining efficiency as for homogeneous dendritic catalysts.

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Section: Introductionmentioning

confidence: 99%

“…The selective hydrogenation of alkynes is one of the key and most important reactions in modern catalysis [1][2][3][4]. The large-scale selective hydrogenation of acetylenic hydrocarbons in pyrolysis ethylene or styrene before their polymerization are illustrative examples of the industrial use of this reaction [1,5,6]. The application of the selective hydrogenation of alkynes to fine organic synthesis makes it possible to obtain cis-and trans-olefins as feedstock for the food and pharmaceutical (for example, the synthesis of vitamins A, E, and K) industries and for the production of solvents, detergents, etc.…”

Section: Introductionmentioning

confidence: 99%

Highly Active Bimetallic Single-Atom Alloy PdAg Catalysts on Cerium-Containing Supports in the Hydrogenation of Alkynes to Alkenes

et al. 2022

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A study of a series of single-atom-alloy catalysts Pd1Ag3/Al2O3, Pd1Ag3/CeO2–Al2O3, and Pd1Ag3/CeO2–ZrO2 in the selective hydrogenation of diphenylacetylene (DPA) showed a significant (five-fold) increase in activity for the PdAg3/CeO2–ZrO2 sample in comparison with that of Pd1Ag3/Al2O3. It was especially noted that the increase in activity was not accompanied by a decrease in the selectivity for the target product. This catalytic behavior can be explained by two factors: (1) a more than twofold increase in the dispersity of the PdAg3/CeO2–ZrO2 catalyst and (2) a change in the electronic state of the nanoparticles, as determined from the results of an IR-spectroscopic study of adsorbed CO. The retention of the high selectivity of the synthesized catalysts indicated the stability of the structure of Pd1 monoatomic sites in the catalysts prepared by deposition on Ce-containing supports, which was also confirmed by the IR spectroscopy of adsorbed CO. The experimental results indicate that Ce-containing supports are promising for the synthesis of catalysts for the selective hydrogenation of substituted alkynes.

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Gas-Phase and Liquid-Phase Hydrogenation of Acetylene in Lean and Enriched Mixtures over Supported Modified Palladium Catalysts

Cited by 17 publications

References 121 publications

Synthetic Strategies of Supported Pd-Based Bimetallic Catalysts for Selective Semi-Hydrogenation of Acetylene: A Review and Perspectives

Synthetic Strategies of Supported Pd-Based Bimetallic Catalysts for Selective Semi-Hydrogenation of Acetylene: A Review and Perspectives

Heterogeneous Dendrimer-Based Catalysts

Highly Active Bimetallic Single-Atom Alloy PdAg Catalysts on Cerium-Containing Supports in the Hydrogenation of Alkynes to Alkenes

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