Controlled silylation of MoVTeNb mixed oxide catalyst for the selective oxidation of propane to acrylic acid

Tu, X.; Niwa, Masao; Arano, Akio; Kimata, Yoshinori; Okazaki, E.; Nomura, Souichi

doi:10.1016/j.apcata.2017.09.013

Cited by 19 publications

(12 citation statements)

References 51 publications

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“…The activity and product distribution of MoV(Te/Sb)Nb oxides in selective oxidation of light hydrocarbons are influenced by their acidic properties. 32 , 34 , 39 , 40 , 54 , 61 In propane oxidation to acrylic acid, in particular, Brønsted acid sites are claimed to favor the pathway to acetone, which then reconverts preferably to acetic acid and CO x rather than the desired pathway to acrylic acid. 32 Collected after desorption at 50, 100, and 200 °C for samples Cat-Te, Cat-Te007K, and Cat-Te007Bi, a set of FT-IR spectra of adsorbed pyridine is displayed in Figure 4 .…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, the partial elimination of surface Brønsted-type acid sites when doping with K seems to have an important role in the enhancement of acrylic acid production, as found by others; 32 , 39 − 41 blocking Brønsted-type sites inhibited acrylic acid reoxidation. 61 In fact, experimental data feeding propene ( Section 3.2.2 ) showed that, although the partial reduction in Brønsted-type acidity on K-doped catalyst impacted propene conversion negatively, it eased acrylic acid desorption, thus increasing its amount in the gas phase.…”

Section: Resultsmentioning

confidence: 99%

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Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbO_x for Propa(e)ne Oxidation

et al. 2021

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Adding a small quantity of K or Bi to a MoVTeNbO x via impregnation with inorganic solutions modifies its surface acid and redox properties and its catalytic performance in propa(e)ne partial oxidation to acrylic acid (AA) without detriment to its pristine crystalline structure. Bi-doping encourages propane oxydehydrogenation to propene, thus enlarging the net production rate of AA up to 35% more. The easier propane activation/higher AA production over the Bi-doped catalyst is ascribed to its higher content of surface V leading to a larger amount of total V 5+ species, the isolation site effect of NbO x species on V, and its higher Lewis acidity. K-doping does not affect propane oxydehydrogenation to propene but mainly acts over propene once formed, also increasing AA to a similar extent as Bi-doping. Although K-doping lowers propene conversion, it is converted more selectively to acrylic acid owing to its reduced Brønsted acidity and the presence of more Mo 6+ species, thereby favoring propene transformation via the π-allylic species route producing acrylic acid over that forming acetic acid and CO x via acetone oxidation and that yielding directly CO x .

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbO_x for Propa(e)ne Oxidation

et al. 2021

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“…[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] To date the development of oxide MoVTe(Sb)NbO x catalysts for selective oxidation of light alkanes is well described in the literature. [22][23][24][25][26] The discovery of MoÀ VÀ Te(Sb)À Nb mixed oxides as active and selective catalysts for the (amm)oxidation of propane to acrylonitrile and acrylic acid by Mitsubishi Chemical in the early 1990 s, [27,28] and more recently for the oxidative dehydrogenation of ethane to ethylene [29,30] has been a real breakthrough. The catalytic performance of these catalysts overcomes any other catalytic system proposed.…”

Section: Introductionmentioning

confidence: 99%

New Multicomponent MoVSbNbCeO_x/SiO₂ Catalyst with Enhanced Catalytic Activity for Oxidative Dehydrogenation of Ethane to Ethylene

et al. 2020

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In our study, we have obtained a multicomponent MoVSbNbCeOx/SiO2 catalyst with high catalytic activity for oxidative dehydrogenation of ethane (ODE) to ethylene. To date, multicomponent MoVTe(Sb)NbOx catalysts, which have been intensively studied during the last years, were found as very promising for the ODE to produce ethylene. It was generally agreed that the MoVTeNbOx catalyst was more efficient than MoVSbNbOx. The major drawback of using Te‐containing catalysts is the presence of environmentally harmful, toxic tellurium, and its volatility during the catalyst preparation and catalytic reaction conditions. In our work, the Mo1V0.24Sb0.23Nb0.08Ce0.01Ox/50 wt. % SiO2 catalyst was prepared via the spray‐dry method of aqueous solutions of the starting components, followed by heat‐treatment in He at 350 and 600 °C. For comparative purpose, one of the best Te‐containing catalysts Mo1V0.3Te0.23Nb0.12Ox was also tested in this reaction under the similar reaction conditions. A comparison of the catalytic properties of Sb− and Te− containing catalysts at the reaction temperature of 400–450 °C illustrates for both catalysts relatively high catalytic properties for ODE. The yield of ethylene of ca. 74 % was obtained for these catalysts, which exceeds the best yield reported in literature for Sb‐containing catalysts. The two main phases – M1 and M2 were revealed by XRD in the Sb‐containing catalyst. Intergrowth between the crystals of M1 and M2 phases with the formation of the interphase boundary in the highly active and selective Sb‐containing catalyst can be proposed from HRTEM results. The nature of the active state in this catalyst is discussed.

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“…In the process of oxidative conversion of propane-butane mixture on various types of catalysts is possible to obtain a range of products such as oxygenates [2][3][4][5] , olefins [6][7][8][9] , hydrogen 10,11 , synthesis gas [12][13][14] and CO 2 + H 2 O 15 .…”

Section: Introductionmentioning

confidence: 99%

Catalytic Oxidation of C3-C4 Mixture Into Industrial Important Chemical Products

Baizhumanova¹,

Тунгатарова²,

Kaumenova³

et al. 2019

Orient. J. Chem

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The results of a study of the activity of polyoxide catalysts based on molybdenum, chromium and gallium supported on natural clays for the catalytic oxidation of light alkanes to industrially important chemical products are presented. Studies of the oxidative conversion of a propane-butane mixture on molybdenum, chromium and gallium polyoxometallates supported on natural clays allowed to determine that the predominant composition of the products is determined by the temperature of the process.

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Controlled silylation of MoVTeNb mixed oxide catalyst for the selective oxidation of propane to acrylic acid

Cited by 19 publications

References 51 publications

Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbO_x for Propa(e)ne Oxidation

Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbO_x for Propa(e)ne Oxidation

New Multicomponent MoVSbNbCeO_x/SiO₂ Catalyst with Enhanced Catalytic Activity for Oxidative Dehydrogenation of Ethane to Ethylene

Catalytic Oxidation of C3-C4 Mixture Into Industrial Important Chemical Products

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Controlled silylation of MoVTeNb mixed oxide catalyst for the selective oxidation of propane to acrylic acid

Cited by 19 publications

References 51 publications

Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbOx for Propa(e)ne Oxidation

Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbOx for Propa(e)ne Oxidation

New Multicomponent MoVSbNbCeOx/SiO2 Catalyst with Enhanced Catalytic Activity for Oxidative Dehydrogenation of Ethane to Ethylene

Catalytic Oxidation of C3-C4 Mixture Into Industrial Important Chemical Products

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Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbO_x for Propa(e)ne Oxidation

Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbO_x for Propa(e)ne Oxidation

New Multicomponent MoVSbNbCeO_x/SiO₂ Catalyst with Enhanced Catalytic Activity for Oxidative Dehydrogenation of Ethane to Ethylene