Dehydrogenation of Propane with СО2 on Supported CrOx/SiO2 Catalysts

Tedeeva, Marina A.; Kustov, Alexander L.; Прибытков, П. В.; Леонов, А. В.; Дунаев, С. Ф.

doi:10.1134/s0036024418120403

Cited by 12 publications

(9 citation statements)

References 24 publications

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“…The granules were crushed and sieved, and the 0.25-0.50 mm fraction was collected. The supports were dried at T = 100°C in air for 6 h, and then impregnated with an aqueous solution of Cr(NO 3 ) 3 •9H 2 O (Acros) of an appropriate concentration and dried in air at 100°C for 1 h. Then the samples were calcinated in an air flow (30 mL/min) at 600°C for 4 h until chromium nitrate completely decomposed; the decomposition of Cr(NO 3 ) 3 •9H 2 O on the SiO 2 surface was studied in [23].…”

Section: Synthesis Of Samplesmentioning

confidence: 99%

Oxidative Dehydrogenation of Ethane in the Presence of СО2 on CrOx/SiO2 Catalysts

Ivashchenko

Tedeeva

Kartavova

et al. 2021

Russ. J. Phys. Chem.

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The oxidative dehydrogenation of ethane in the presence of CO 2 was studied on SiO 2 -supported chromium oxide catalytic systems with different texture characteristics. The highest activity was displayed by the samples deposited on SiO 2 with a high specific surface area. On the 5%CrО х /SiO 2 catalyst, the ethylene selectivity was ~80% at ~50% conversion of ethane. The results of our physicochemical analysis showed that the catalyst activity depended on the content of Cr(VI) particles, whose formation depended on the nature of support.

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Section: Synthesis Of Samplesmentioning

confidence: 99%

Oxidative Dehydrogenation of Ethane in the Presence of СО2 on CrOx/SiO2 Catalysts

Ivashchenko

Tedeeva

Kartavova

et al. 2021

Russ. J. Phys. Chem.

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“…Cr 2 O 3 /SiO 2 showed higher ethane conversion and ethylene selectivity. The catalytic activities were ranked as follows Cr/SiO 2 > Cr/ZrO 2 > Cr/Al 2 O 3 > Cr/TiO 2 [76,77]. Notably, Cr 2 O 3 interacted more with Al 2 O 3 than with SiO 2 , resulting in tetrahedral Cr 6+ sites and declining activity [78].…”

Section: Performance Of Co 2 On Dehydrogenation Of Ethanementioning

confidence: 99%

The Role of CO2 as a Mild Oxidant in Oxidation and Dehydrogenation over Catalysts: A Review

et al. 2020

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Carbon dioxide (CO2) is widely used as an enhancer for industrial applications, enabling the economical and energy-efficient synthesis of a wide variety of chemicals and reducing the CO2 levels in the environment. CO2 has been used as an enhancer in a catalytic system which has revived the exploitation of energy-extensive reactions and carry chemical products. CO2 oxidative dehydrogenation is a greener alternative to the classical dehydrogenation method. The availability, cost, safety, and soft oxidizing properties of CO2, with the assistance of appropriate catalysts at an industrial scale, can lead to breakthroughs in the pharmaceutical, polymer, and fuel industries. Thus, in this review, we focus on several applications of CO2 in oxidation and oxidative dehydrogenation systems. These processes and catalytic technologies can reduce the cost of utilizing CO2 in chemical and fuel production, which may lead to commercial applications in the imminent future.

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“…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. 38 A combination of synthetic ways also can be used in synthesis, such as a templated sol-gel route in which a template is introduced in the sol-gel process.…”

Section: Introductionmentioning

confidence: 99%

“…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 38 .…”

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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Dehydrogenation of Propane with СО2 on Supported CrOx/SiO2 Catalysts

Cited by 12 publications

References 24 publications

Oxidative Dehydrogenation of Ethane in the Presence of СО2 on CrOx/SiO2 Catalysts

Oxidative Dehydrogenation of Ethane in the Presence of СО2 on CrOx/SiO2 Catalysts

The Role of CO2 as a Mild Oxidant in Oxidation and Dehydrogenation over Catalysts: A Review

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

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Dehydrogenation of Propane with СО2 on Supported CrOx/SiO2 Catalysts

Cited by 12 publications

References 24 publications

Oxidative Dehydrogenation of Ethane in the Presence of СО2 on CrOx/SiO2 Catalysts

Oxidative Dehydrogenation of Ethane in the Presence of СО2 on CrOx/SiO2 Catalysts

The Role of CO2 as a Mild Oxidant in Oxidation and Dehydrogenation over Catalysts: A Review

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

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Product

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