Kinetics of phenylacetylene selective hydrogenation to styrene over metal-free polymeric carbon nitrides

Akhmedov, V. M.; Aliyev, Alovsat; Bahmanov, M F; Ahmadov, Vusal; Тагиев, Д. Б.

doi:10.1016/j.apcata.2018.07.033

Cited by 15 publications

(9 citation statements)

References 27 publications

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“…On the other hand, mpg‐C 3 N 4 has demonstrated the complete PA conversion with 90.0 % ST selectivity with good catalyst stability. However, the system requires operation at high temperature of 250 °C [26a] . The Pd/PCFs demonstrated good catalytic activity under low reaction temperature but high hydrogen pressure (3 bar) has been employed [26c] .…”

Section: Resultsmentioning

confidence: 99%

“…The catalytic activity of the Pd/UiO-66 (Hf) is compared with the reported catalysts for the semi-hydrogenation of PA. A handful literature (non-MOF catalysts) is available on the fixedbed flow conditions (Table 1). [26] However, number of materials have been explored under batch mode. [27] Among, the Pd stabilized over different supports have been studied extensively (Table 1).…”

Section: Chemistryselectmentioning

confidence: 99%

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Continuous Flow Liquid‐Phase Semihydrogenation of Phenylacetylene over Pd Nanoparticles Supported on UiO‐66(Hf) Metal‐Organic Framework

et al. 2023

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Catalysis under continuous flow operation is industrially more relevant compared to reactions carried out in batch reactors. But catalysis with metal‐organic frameworks (MOFs) is largely restricted to batch reactions, especially in case of semi hydrogenation reactions. We anchored Pd nanoparticles (NPs) on robust UiO‐66(Hf) MOF to develop effective catalyst for semi hydrogenation of phenylacetylene into styrene. We investigated catalytic performance of Pd/UiO‐66(Hf) in a continuous‐flow liquid‐phase semi‐hydrogenation of phenylacetylene (PA). In this study, Pd/UiO‐66(Hf) catalyst exhibited good catalytic performance with a rare combination of high PA conversion (99.0 %) and high styrene selectivity (90.0 %). Additionally, Pd/UiO‐66(Hf) demonstrated lower deactivation rate in contrast to many reported materials to date. The higher stability of metal NPs over UiO‐66(Hf) aroused from the strong metal‐support interaction (between Brønsted acidic μ3‐OH of MOF and Pd). The Pd/UiO‐66(Hf) retained its catalytic activity even after four recycles.

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Section: Resultsmentioning

confidence: 99%

Section: Chemistryselectmentioning

confidence: 99%

Continuous Flow Liquid‐Phase Semihydrogenation of Phenylacetylene over Pd Nanoparticles Supported on UiO‐66(Hf) Metal‐Organic Framework

et al. 2023

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“…The inter-planar spacing was evaluated with Bragg's law, eqn (4), and the lattice parameter was calculated with eqn 5. The crystallite sizes of the samples were calculated with Scherrer's equation (eqn (6)) by applying the full width at half…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, the polymerization catalysts are poisoned and deactivated, restraining the maximum allowable limit to below 10 ppm. 1,[4][5][6] Effective technology for removing PA from styrene is through selective catalytic hydrogenation. 7 In converting different alkynes to alkenes, metals spanning Pd, 8 Pt, 5 Ni, 9 and Au (ref.…”

Section: Introductionmentioning

confidence: 99%

Functionalized ceria–niobium supported nickel catalysts for gas phase semi-hydrogenation of phenylacetylene to styrene

Shittu

Khaleel

Polychronopoulou

et al. 2022

Catal. Sci. Technol.

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“…Продемонстровано каталітичну активність графенових наноматеріалів у газофазних реакціях гідрування СО 2 та ароматичних сполук за високого тиску [11][12][13]. Проведено кінетичне дослідження гідрування фенілацетилену на нітридах вуглецю за атмосферного тиску [14]. Однак лише кілька публікацій присвячено каталітичній активності ВОГ та ВНТ у гідруванні органічних сполук молекулярним воднем за атмосферного тиску [15][16][17].…”

Section: каталітичні властивості нановуглецевих матеріалів у реакції селективного гідрування ацетиленуunclassified

Catalytic properties of nanocarbon materials in reaction of selective hydrogenation of acetylene

Bychko¹,

Abakumov²,

Trypolskyi³

et al. 2021

New Functional Substances and Materials for Chemical Engineering

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The chapter presents the results of studies of the catalytic properties of nanocarbon materials based on carbon nanotubes and reduced graphene oxide in the hydrogenation of ethylene, acetylene and ethylene-acetylene mixture by molecular hydrogen at atmosphere pressure. The current state of scientific approaches to the creation of nanocarbon metal-free catalysts for the hydrogenation reactions in both liquid and gas phases is presented. A possible nature of active center of the hydrogenation reaction located on the surface of the nanocarbon material is discussed. It is shown that the catalytic activity of the nanocarbon materials is not associated with metal impurities. The correlation between the structural characteristics of carbon nanomaterials and their catalytic properties in the hydrogenation reactions of unsaturated hydrocarbons is demonstrated. A comparative analysis of the catalytic activity of nanocarbon materials and catalysts that contain noble metals in the hydrogenation reaction of acetylene is presented. Finally, the fundamental possibility of creating a nanocarbon catalyst for selective hydrogenation of acetylene in excess ethylene is shown.

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Kinetics of phenylacetylene selective hydrogenation to styrene over metal-free polymeric carbon nitrides

Cited by 15 publications

References 27 publications

Continuous Flow Liquid‐Phase Semihydrogenation of Phenylacetylene over Pd Nanoparticles Supported on UiO‐66(Hf) Metal‐Organic Framework

Continuous Flow Liquid‐Phase Semihydrogenation of Phenylacetylene over Pd Nanoparticles Supported on UiO‐66(Hf) Metal‐Organic Framework

Functionalized ceria–niobium supported nickel catalysts for gas phase semi-hydrogenation of phenylacetylene to styrene

Catalytic properties of nanocarbon materials in reaction of selective hydrogenation of acetylene

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