Promoting effect of cerium on MoVTeNb mixed oxide catalyst for oxidative dehydrogenation of ethane to ethylene

Yun, Yang; Lee, Minzae; Sung, Jae Hyuck; Yun, Danim; Kim, Tae Yong; Park, Hongseok; Lee, Kyung Rok; Song, Chang Myeon; Kim, Younhwa; Lee, Joongwon; Seo, Young Hwan; Song, In Kyu; Yi, Jongheop

doi:10.1016/j.apcatb.2018.06.025

Cited by 60 publications

(37 citation statements)

References 42 publications

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“…More recent developments have led to the introduction of oxygen to the DH reaction, which rendered the process exothermic, with much reduced thermodynamic limitations and reduced coke deposition on the catalyst. This is the reason why oxidative dehydrogenation (ODH) would be the preferred reaction in the petrochemical industry [9,10]. Very high COx production remains the major disadvantage of ODH reactions.…”

Section: Introductionmentioning

confidence: 99%

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

2020

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Non-coking stable alkaline earth metal (M = Mg, Sr, and Ba) modified Ga-NaY catalysts were prepared by ionic-exchange and tested in oxidative dehydrogenation (ODH) of n-octane using air as the source of oxygen. The role of the alkaline earth metals in NaY was to poison the acid sites while enhancing the basic sites responsible for ODH. The exception was the calcium modified NaY, which was more acidic than the parent NaY, coking and unstable under the ODH conditions used in this study. The role of gallium was to enhance the dehydrogenation pathway and improve the stability of NaY. The sequence of increasing selectivity to octenes followed the order: CaGa-NaY < Ga-NaY< MgGa-NaY < SrGa-NaY < BaGa-NaY. The highest octene selectivity obtained was 37% at iso-conversion of 6 ± 1% when BaGa-NaY was used at a temperature of 450 °C. The activity of the catalysts was directly proportional to the reducibility of the catalysts, which is in agreement with expectations.

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Section: Introductionmentioning

confidence: 99%

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

2020

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“…In practical industry manufacture, the unsaturated organic compound is mainly produced by dehydrogenation of saturated organic compound such as propane and butane and so on. [1][2][3][4] Styrene, as an important monomer of synthetic resins, ion-exchange resins and synthetic rubber, has gain more and more interests for its production. It is generally produced by oxidative dehydrogenation of ethylbenzene (ODH) with oxygen in the reaction gas or direct dehydrogenation of ethylbenzene (DDH) without oxygen.…”

Section: Introductionmentioning

confidence: 99%

Sulfate Surfactant Assisted Approach to Fabricate Sulphur‐Doped Supported Nanodiamond Catalyst on Carbon Nanotube with Unprecedented Catalysis for Ethylbenzene Dehydrogenation

Zhou

Zhao

2019

ChemCatChem

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Direct dehydrogenation (DDH) of ethylbenzene is an efficient chemical process for styrene production. Nanocarbon materials, as clean and low‐cost catalysts, have drawn more and more attention in this field. In this work, inspired by the promoting effect of support modulation on the catalytic performance of the general supported‐type catalyst, we present a facile sulfate surfactant assisted dispersion with subsequent annealing (SADA) approach for preparing sulphur‐doped supported nanodiamond catalyst on carbon nanotube (ND/CNT‐SDS) with abundant active sites by using sodium dodecyl sulfate (SDS) as both the dispersing agent for promoting the dispersion of catalytically active ND motif and the CNT support and the sulphur source for sulphur doping, yielding an outstanding supported ND catalyst for DDH of ethylbenzene to styrene with 7.7 mmol g−1cat. h−1 of styrene rate and 98.2 % of styrene selectivity. ND/CNT‐SDS catalyst demonstrates 3.0 times higher styrene rate of the pristine ND. Moreover, ND/CNT‐SDS catalyst shows 1.5 times higher styrene rate of the previously reported defect‐enriched N,O‐codoped ND/CNT (N,O‐ND/CNT‐d) with up to 98 % of similar styrene selectivity, ascribed to its more exposed C=O active sites and higher specific surface area originating from the promoted dispersion of both ND and CNT by SDS, as well as the sulphur‐doping. Moreover, this work also presents a novel and efficient method for the designing the other supported nanocarbon catalysts from dispersion‐required catalytically active nanocarbon motif and the nanocarbon carrier.

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“…Consequently, substitution of Te by Sb that is not volatile and is more eco-friendly would be beneficial to several points of view. It was shown in [55,56] that the introduction of Bi or Ce into MoVTeNbO x catalyst leads to enhanced stability of M1 phase in ODE under the reduced reaction conditions while the evident deactivation of the undoped catalyst is observed. EXAFS spectroscopy and in situ XRD revealed that Bi is located within the extended six membered channels of the M1 structure, which are similar to Te sites.…”

Section: Introductionmentioning

confidence: 99%

“…But it is still deactivated. [56,57] Today MoVNbSbO x catalysts are considered as an alternative to replace MoVNbTeO x catalysts without altering their catalytic properties. However, no reliable data concerning the high catalytic activity and stability of MoVNbSbO x catalysts under ODE reaction conditions were obtained.…”

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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Promoting effect of cerium on MoVTeNb mixed oxide catalyst for oxidative dehydrogenation of ethane to ethylene

Cited by 60 publications

References 42 publications

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Sulfate Surfactant Assisted Approach to Fabricate Sulphur‐Doped Supported Nanodiamond Catalyst on Carbon Nanotube with Unprecedented Catalysis for Ethylbenzene Dehydrogenation

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

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Promoting effect of cerium on MoVTeNb mixed oxide catalyst for oxidative dehydrogenation of ethane to ethylene

Cited by 60 publications

References 42 publications

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Sulfate Surfactant Assisted Approach to Fabricate Sulphur‐Doped Supported Nanodiamond Catalyst on Carbon Nanotube with Unprecedented Catalysis for Ethylbenzene Dehydrogenation

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

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