Chromium catalysts supported on carbon nanotubes and graphene nanoflakes for CO2-assisted oxidative dehydrogenation of propane

Chernyak, S. A.; Kustov, Alexander L.; Stolbov, Dmitrii N.; Tedeeva, Marina A.; Isaikina, O. Ya.; Маслаков, К. И.; Усольцева, Н. В.; Savilov, S. V.

doi:10.1016/j.apsusc.2021.152099

Cited by 16 publications

(9 citation statements)

References 57 publications

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“…The undoped graphene nanoflakes and oxidized carbon nanotubes, which possessed a developed mesoporous structure and the highest sp 2 /sp 3 -C surface ratio, showed a propylene yield up to 20%. 156 The porosity effect in the silica support was studied for ethane CO 2 -ODH. The pore size of 7 nm was the best for an optimal conversion of B26% and an ethylene selectivity of 81%.…”

Section: Alkane Oxidative Dehydrogenationmentioning

confidence: 99%

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

et al. 2022

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Section: Alkane Oxidative Dehydrogenationmentioning

confidence: 99%

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

et al. 2022

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“…ODP, or oxidative dehydrogenation of propane with CO 2 , is a promising solution for efficient CO 2 usage. In a new study published in 2022, Chernyak et al included various C-materials for the first time as supports for Cr-based catalysts of CO 2 -assisted ODP [166]. A commercially available activated carbon was evaluated alongside CNTs, jellyfish-like graphene nanoflakes, and their oxidized and N-doped derivatives.…”

Section: Co 2 Hydrogenation Into Hydrocarbons and Oxygenated Hydrocar...mentioning

confidence: 99%

Oxygenated Hydrocarbons from Catalytic Hydrogenation of Carbon Dioxide

2023

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Once fundamental difficulties such as active sites and selectivity are fully resolved, metal-free catalysts such as 3D graphene or carbon nanotubes (CNT) are very cost-effective substitutes for the expensive noble metals used for catalyzing CO2. A viable method for converting environmental wastes into useful energy storage or industrial wealth, and one which also addresses the environmental and energy problems brought on by emissions of CO2, is CO2 hydrogenation into hydrocarbon compounds. The creation of catalytic compounds and knowledge about the reaction mechanisms have received considerable attention. Numerous variables affect the catalytic process, including metal–support interaction, metal particle sizes, and promoters. CO2 hydrogenation into different hydrocarbon compounds like lower olefins, alcoholic composites, long-chain hydrocarbon composites, and fuels, in addition to other categories, have been explained in previous studies. With respect to catalyst design, photocatalytic activity, and the reaction mechanism, recent advances in obtaining oxygenated hydrocarbons from CO2 processing have been made both through experiments and through density functional theory (DFT) simulations. This review highlights the progress made in the use of three-dimensional (3D) nanomaterials and their compounds and methods for their synthesis in the process of hydrogenation of CO2. Recent advances in catalytic performance and the conversion mechanism for CO2 hydrogenation into hydrocarbons that have been made using both experiments and DFT simulations are also discussed. The development of 3D nanomaterials and metal catalysts supported on 3D nanomaterials is important for CO2 conversion because of their stability and the ability to continuously support the catalytic processes, in addition to the ability to reduce CO2 directly and hydrogenate it into oxygenated hydrocarbons.

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“…Micro‐ and mesoporous supports traditionally are used in the most active catalysts of this reaction 2,5,6,18,35 . Different materials can be used as supports, for example, nanotubes and graphene nanoflakes 36 . There are examples of using different silica gels in the reaction of oxidative propane dehydrogenation with CO 2 proceeding with high selectivity and activity 37 .…”

Section: Introductionmentioning

confidence: 99%

“…2,5,6,18,35 Different materials can be used as supports, for example, nanotubes and graphene nanoflakes. 36 There are examples of using different silica gels in the reaction of oxidative propane dehydrogenation with CO 2 proceeding with high selectivity and activity. 37 There are several approaches for the preparation of mesoporous materials with different pore structures, such as template synthesis, the sol-gel method, metal-organic framework (MOF) synthesis, and self-formation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Mashkin

Tedeeva

Fedorova

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND Propane dehydrogenation is an alternative way both to produce propylene and to utilize CO2. Because of the high oxygen mobility in cerium‐zirconium oxide (CexZr1‐xO2), it looks promising as a support for the chromium oxide catalysts of propane dehydrogenation with CO2. Supports of CexZr1‐xO2 on mesoporous silica were synthesized in this work to combine the high oxygen mobility of the former and the pore structure of the latter. RESULTS Two applied synthetic approaches resulted in materials with different structure and properties. The wet impregnated catalysts demonstrated a higher activity and selectivity to propylene. At the same time, they had larger pore size distribution maxima (~9 nm) than the samples prepared by the introduction of metals simultaneously with Si‐precursor hydrolysis (~2 nm). For the chromium catalysts with the same support, the catalytic activity decreased with varying chromium loading as follows: 5% Cr > 3% Cr ≈ 7% Cr. For the catalysts with different CexZr1‐xO2 supports and equal chromium loading, the activity decreased with x changing as follows: 0.5 > 0.6 > 0.8 for the samples prepared by wet impregnation, and 0.8 ≈ 0.6 > 0.5 for the other synthetic path. CONCLUSIONS Catalysts were tested in oxidative dehydrogenation of propane with CO2. The wet impregnation approach turned out to be much more promising in terms of catalytic activity and selectivity to propylene in the reaction of propane dehydrogenation with CO2. The selectivity achieved was ≤80% at a 40% conversion. © 2023 Society of Chemical Industry (SCI).

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Chromium catalysts supported on carbon nanotubes and graphene nanoflakes for CO2-assisted oxidative dehydrogenation of propane

Cited by 16 publications

References 57 publications

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Oxygenated Hydrocarbons from Catalytic Hydrogenation of Carbon Dioxide

Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

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Chromium catalysts supported on carbon nanotubes and graphene nanoflakes for CO2-assisted oxidative dehydrogenation of propane

Cited by 16 publications

References 57 publications

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Oxygenated Hydrocarbons from Catalytic Hydrogenation of Carbon Dioxide

Synthesis of CexZr1‐xO2/SiO2 supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

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Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide