Carbon nanotubes modified by multi-heteroatoms polymer for oxidative dehydrogenation of propane: Improvement of propene selectivity and oxidation resistance

Cao, Tianlong; Dai, Xueya; Liu, Weijie; Fu, Yu; Qi, Wei

doi:10.1016/j.carbon.2021.12.069

Cited by 21 publications

(14 citation statements)

References 75 publications

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“…They also modified OCNTs using multiheteroatom N, P, and S codoping polymers. 32 The obtained catalyst showed high propylene selectivity and stability (after a 20 h dehydrogenation process). Therefore, through investigating the catalytic properties, P−O and S−C species on the catalyst surface were found to be responsible for the acceptable selectivity and stability of the catalyst.…”

Section: Introductionmentioning

confidence: 91%

Experimental Investigation of the Performance and Catalytic Properties of xFe₂O₃/ZrO₂ Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO₂

Mohammadzadeh,

Shariati,

Khosravi-Nikou

2023

Ind. Eng. Chem. Res.

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In this work, the performance of a series of ZrO 2supported Fe 2 O 3 mesoporous catalysts (xFe 2 O 3 /ZrO 2 ) was investigated with different weight percentages of Fe in the propane dehydrogenation process with CO 2 . The results showed that the synthesized catalysts suffered from coke deposits and bulk Fe 2 O 3 formation at low and high Fe loadings, respectively. An optimum Fe loading of 12 wt % indicated the best results due to the better reduction properties: an initial propane conversion of 32% and a propylene selectivity of 73%. Active oxygens on active Fe 3+ species and Zr 4+ strong acid sites were found to be responsible for propylene production and the source of side reactions, respectively. Increasing the iron species on ZrO 2 improved the propylene selectivity and catalyst stability, which were related to the coverage of Zr 4+ strong acid sites. The results showed that the presence of CO 2 led to the high stability of the catalyst through the reoxidation of active Fe 3 O 4 species and coke removal.

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Section: Introductionmentioning

confidence: 91%

Experimental Investigation of the Performance and Catalytic Properties of xFe₂O₃/ZrO₂ Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO₂

Mohammadzadeh,

Shariati,

Khosravi-Nikou

2023

Ind. Eng. Chem. Res.

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“…In addition, the introduction of nitrogen species also leads to a decrement in butene formation rates, which should be due to the decrease in the acidity of the carbon nanotubes, since carboxylic acid sites (Brønsted acid species) are recognized as the active sites for the dehydration reactions forming alkene molecules. 15,25…”

Section: Catalytic Activity Of Ncnt In Nb Conversion Reactionsmentioning

confidence: 99%

An oxygen-assisted conversion of butanol to value-added products on nanocarbon catalysts: tuning product selectivity via nitrogen doping

Dai

Wang

et al. 2023

Catal. Sci. Technol.

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“…As an alternative means of producing alkenes and oxygenates, the catalytic conversion of light alkanes has attracted extensive attention − because of the discovery of large shale gas reserves. Selective oxidation reactions can be used to convert propane into value-added products such as propylene, aldehydes, alcohols, acids, anhydrides, and other oxygenates. − However, one of the most challenging issues in selective propane oxidation is maintaining high conversion and target product selectivity at high reaction temperatures.…”

Section: Introductionmentioning

confidence: 99%

Dendritic Mesoporous Silica Nanoparticle-Supported Molybdena Catalysts for Propane Selective Oxidation: Catalytic Performance versus Molybdena Molecular Structure

Song

Liu

Zhang

et al. 2023

ACS Appl. Nano Mater.

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Molybdena catalysts supported on dendritic mesoporous silica nanoparticles (Mo/DMSNs) were prepared by the impregnation method and evaluated for the selective oxidation of propane. The dendritic channels and high specific surface area of the DMSN support isolated the active components, which was beneficial for improving the dispersion of the Mo species. The identities of the active Mo species on the Mo/DMSN catalysts were determined using a combination of characterization techniques, and the relationship between the Mo loading and the structures of these Mo species was examined. Upon increasing the Mo loading, the mono-oxo O�Mo(O−Si) 4 and di-oxo (O�) 2 Mo(O−Si) 2 species underwent gradual polymerization to afford crystalline MoO x , where the monooxo and di-oxo species led to higher target product selectivities compared with the crystalline phase. In situ Raman spectroscopy results indicated that the highly dispersed monomolybdenum species were highly stable and resistant to carbon deposition during the reaction. Consequently, the 0.1Mo/DMSN, 0.5Mo/DMSN, and 1.0Mo/DMSN catalysts with monomolybdenum species exhibited higher propane conversions and target product selectivities than the catalysts bearing crystalline MoO x species. The highest yield (37.6%) of the target products (olefins and total aldehydes) was obtained over the 0.5Mo/DMSN catalyst at a temperature of 625 °C.

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Carbon nanotubes modified by multi-heteroatoms polymer for oxidative dehydrogenation of propane: Improvement of propene selectivity and oxidation resistance

Cited by 21 publications

References 75 publications

Experimental Investigation of the Performance and Catalytic Properties of xFe₂O₃/ZrO₂ Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO₂

Experimental Investigation of the Performance and Catalytic Properties of xFe₂O₃/ZrO₂ Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO₂

An oxygen-assisted conversion of butanol to value-added products on nanocarbon catalysts: tuning product selectivity via nitrogen doping

Dendritic Mesoporous Silica Nanoparticle-Supported Molybdena Catalysts for Propane Selective Oxidation: Catalytic Performance versus Molybdena Molecular Structure

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Carbon nanotubes modified by multi-heteroatoms polymer for oxidative dehydrogenation of propane: Improvement of propene selectivity and oxidation resistance

Cited by 21 publications

References 75 publications

Experimental Investigation of the Performance and Catalytic Properties of xFe2O3/ZrO2 Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO2

Experimental Investigation of the Performance and Catalytic Properties of xFe2O3/ZrO2 Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO2

An oxygen-assisted conversion of butanol to value-added products on nanocarbon catalysts: tuning product selectivity via nitrogen doping

Dendritic Mesoporous Silica Nanoparticle-Supported Molybdena Catalysts for Propane Selective Oxidation: Catalytic Performance versus Molybdena Molecular Structure

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Experimental Investigation of the Performance and Catalytic Properties of xFe₂O₃/ZrO₂ Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO₂

Experimental Investigation of the Performance and Catalytic Properties of xFe₂O₃/ZrO₂ Mesoporous Catalysts in Propane Dehydrogenation in the Presence of CO₂