Effect of Bi on catalytic performance and stability of MoVTeNbO catalysts in oxidative dehydrogenation of ethane

Ищенко, Е. В.; Gulyaev, R. V.; Kardash, T. Yu.; Ishchenko, A. V.; Gerasimov, E. Yu.; Соболев, В. И.; Бондарева, В. М.

doi:10.1016/j.apcata.2017.01.023

Cited by 44 publications

(19 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…17,18 They have been the subject of numerous studies that focused on the understanding of their catalytic and structural properties also including operando/ in situ investigations. 7,[9][10][11][12][13]16,[19][20][21][22][23][24][25][26][27][28][29] A crystallographic model is shown in Fig. 1A.…”

Section: A Introductionmentioning

confidence: 99%

Site specific and localized structural displacements in open structured multimetallic oxides

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: A Introductionmentioning

confidence: 99%

Site specific and localized structural displacements in open structured multimetallic oxides

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Some other methods are catalytic cracking, fluid catalytic cracking (FCC), methanol-to-olefins (MTO) technology, and coal-to-methanol-to-olefin (CTO) [4]. Oxidative dehydrogenation of alkanes includes partial oxidation, oxidative dehydrogenation, and ammoxidation (suggested as an alternative) [5]. Disadvantages of the steam cracking method are low energy efficiency and low selectivity of the desired product.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Dehydrogenation of Liquefied Petroleum Gas on Copper, Zinc and Iron Oxide Impregnated on MFI Zeolite Assisted by Electric Power

Alamdari

Karimzadeh

2018

Catalysts

View full text Add to dashboard Cite

Olefin was produced with a non-conventional method using an electric field exerted on zeolites. The lattice oxygen mobility increases with a decrease in band gap, leading to an increase in olefin yield. By impregnating the transition metal, an increase in carrier concentration occurs. The external electric field changes the Fermi level. In this research, HZSM-5 was placed in an external DC electric field with strength appropriate for studying its catalytic performance. The Fermi level changed with the metal type and the external electric field. The increase in permittivity with temperature extracts higher energy from the external electric field. In catalytic reactions assisted by the external DC electric field, at 510 • C, the yield was approximately equal to the yield in a conventional reaction at 650 • C. With regard to TGA, in the catalytic reaction assisted by the external DC electric field, the produced coke declined. The results showed that the maximum yield value (50.54%) and conversion (92.81%) were be obtained at 650 • C with an input electrical current of 12 mA, a gap distance of 10 mm and a metal loading of 4 wt. % over FeHZSM-5.

show abstract

“…% SiO 2 catalyst compared to the MoVTeNbO x catalyst whose specific surface area does not exceed 5-6 m 2 /g. [21,48,55] The mesopore volume for the MoVSbNbCeO x /50 wt. % SiO 2 catalyst is 0.125 cm 3 /g and the catalyst is characterized by a rather wide pore size distribution with a maximum in the range of 20-30 nm which is somewhat lager then for the MoVSbNbO x /SiO 2 catalyst presented in.…”

Section: Chemical Phase Composition and Texture Studiesmentioning

confidence: 99%

“…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%

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

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

Effect of Bi on catalytic performance and stability of MoVTeNbO catalysts in oxidative dehydrogenation of ethane

Cited by 44 publications

References 41 publications

Site specific and localized structural displacements in open structured multimetallic oxides

Site specific and localized structural displacements in open structured multimetallic oxides

Oxidative Dehydrogenation of Liquefied Petroleum Gas on Copper, Zinc and Iron Oxide Impregnated on MFI Zeolite Assisted by Electric Power

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

Contact Info

Product

Resources

About

Effect of Bi on catalytic performance and stability of MoVTeNbO catalysts in oxidative dehydrogenation of ethane

Cited by 44 publications

References 41 publications

Site specific and localized structural displacements in open structured multimetallic oxides

Site specific and localized structural displacements in open structured multimetallic oxides

Oxidative Dehydrogenation of Liquefied Petroleum Gas on Copper, Zinc and Iron Oxide Impregnated on MFI Zeolite Assisted by Electric Power

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

Contact Info

Product

Resources

About

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