Carbon Dioxide Reduction with Hydrogen on Fe, Co Supported Alumina and Carbon Catalysts under Supercritical Conditions

Богдан, В. И.; Koklin, A. E.; Kustov, Alexander L.; Pokusaeva, Yana A.; Богдан, Т. В.; Кustov, Leonid М.

doi:10.3390/molecules26102883

Cited by 16 publications

(7 citation statements)

References 34 publications

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“…On the contrary, Wang et al [42] illustrated that with an increase in MgO content, the strength of the medium basic sites (caused by Mg 2+ /O 2− ) gradually deteriorated due to the formation of MgAlO 4 spinel, and the surfaces of the support and catalyst were mainly composed of weakened medium basic sites and weak basic sites (caused by surface hydroxyls). The formation of MgAlO 4 spinel weakens the interaction between the active iron and the support, promotes the conversion of iron species to active iron, and then promotes the formation of light hydrocarbons [43]. Meanwhile, the weakened medium and weak basic sites promote the desorption of olefin species, which is beneficial for increasing the selectivity of light olefins in the products.…”

Section: Al 2 Omentioning

confidence: 99%

Research Progress on the Effects of Support and Support Modification on the FTO Reaction Performance of Fe-Based Catalysts

Wen,

Zhou,

et al. 2023

Molecules

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In recent years, the non-petroleum production of light olefins has been the research focus of Fischer–Tropsch olefin synthesis (FTO). Iron-based catalysts have attracted much attention because of their low price, high catalytic activity, and wide temperature range. In this paper, traditional modification, hydrophobic modification, and amphiphobic modification of the catalyst are summarized and analyzed. It was found that traditional modification (changing the pore size and surface pH of the catalyst) will reduce the dispersion of Fe, change the active center of the catalyst, and improve the selectivity of light olefins (for example, SiO2: 32%). However, compared with functional methods, these traditional methods lead to poor stability and high carbon dioxide selectivity (for example, SiO2: 34%). Hydrophobic modification can inhibit the adsorption and retention of water molecules on the catalyst and reduce the local water pressure near the iron species in the nuclear layer, thus inhibiting the further formation of CO2 (for example, SiO2: 5%) of the WGSR. Amphiphobic modification can not only inhibit the WGSR, but also reduce the steric hindrance of the catalyst, increase the diffusion rate of olefins, and inhibit the reabsorption of olefins. Follow-up research should focus on these issues.

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Section: Al 2 Omentioning

confidence: 99%

Research Progress on the Effects of Support and Support Modification on the FTO Reaction Performance of Fe-Based Catalysts

Wen,

Zhou,

et al. 2023

Molecules

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“…Fe−based catalysts [50,[99][100][101][102][103][104][105], as typical high-temperature catalysts, have also been used in RWGS reaction studies. Here are some selected examples.…”

Section: Fe−based Catalystsmentioning

confidence: 99%

“…Bogdan et al [99] investigated, for the first time, the reduction of CO 2 to CO with hydrogen on alumina-supported Co and Fe catalysts under supercritical conditions with CO or CH 4 as the target product. The selectivity of the Co/Al 2 O 3 catalyst for methanation is close to 100%, while the Fe/Al 2 O 3 system shows an advantage for hydrogenating CO 2 to CO and significantly forms ethane (up to 15%).…”

Section: Fe−based Catalystsmentioning

confidence: 99%

Recent Advances in the Reverse Water–Gas Conversion Reaction

Zhou,

Zhang,

et al. 2023

Molecules

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The increase in carbon dioxide emissions has significantly impacted human society and the global environment. As carbon dioxide is the most abundant and cheap C1 resource, the conversion and utilization of carbon dioxide have received extensive attention from researchers. Among the many carbon dioxide conversion and utilization methods, the reverse water–gas conversion (RWGS) reaction is considered one of the most effective. This review discusses the research progress made in RWGS with various heterogeneous metal catalyst types, covering topics such as catalyst performance, thermodynamic analysis, kinetics and reaction mechanisms, and catalyst design and preparation, and suggests future research on RWGS heterogeneous catalysts.

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“…The CO 2 molecule is extremely stable; therefore, for carrying out chemical reactions, it is necessary to use a heterogeneous catalyst and high-energy reagents, for example, hydrogen [ 6 ]. From this point of view, hydrogenation of CO 2 on heterogeneous catalysts is a simple and convenient way to obtain synthesis gas, hydrocarbons of various structures, methanol, other alcohols, and some oxygenates [ 7 , 8 , 9 , 10 , 11 , 12 ]. Usually, the conversion of CO 2 into value-added products involves two stages: the conversion of CO 2 to CO by a reverse water shift reaction and the further conversion of CO by the Fischer–Tropsch process [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Zn Doping Effect on the Performance of Fe-Based Catalysts for the Hydrogenation of CO2 to Light Hydrocarbons

et al. 2022

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In this work, we studied the role of zinc in the composition of supported iron-containing catalysts for the hydrogenation of CO2. Various variants of incipient wetness impregnation of the support were tested to obtain catalyst samples. The best results are shown for samples synthesized by co-impregnation of the support with a common solution of iron and zinc precursors at the same molar ratio of iron and zinc. Catalyst samples were analyzed by various methods: Raman, DRIFT-CO, TPR-H2, XPS, and UV/Vis. The introduction of zinc leads to the formation of a mixed ZnFe2O4 phase. In this case, the activation of the catalyst proceeds through the stage of formation of the metastable wustite phase FeO. The formation of this wustite phase promotes the formation of metallic iron in the composition of the catalyst under the reaction conditions. It is believed that the presence of metallic iron is a necessary step in the formation of iron carbides—that is, active centers for the formation and growth of chain in the hydrocarbons. This leads to an increase in the activity and selectivity of the formation of hydrocarbons in the process of CO2 hydrogenation.

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Carbon Dioxide Reduction with Hydrogen on Fe, Co Supported Alumina and Carbon Catalysts under Supercritical Conditions

Cited by 16 publications

References 34 publications

Research Progress on the Effects of Support and Support Modification on the FTO Reaction Performance of Fe-Based Catalysts

Research Progress on the Effects of Support and Support Modification on the FTO Reaction Performance of Fe-Based Catalysts

Recent Advances in the Reverse Water–Gas Conversion Reaction

Zn Doping Effect on the Performance of Fe-Based Catalysts for the Hydrogenation of CO2 to Light Hydrocarbons

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