A synergistic effect of α-Bi2Mo3O12 and γ-Bi2MoO6 catalysts in the oxidative dehydrogenation of C4 raffinate-3 to 1,3-butadiene

Lee, Howon; Kim, Hee‐Soo; Chung, Young-Min; Kim, Tae Jin; Lee, Seong Jun; Oh, Seung-Hoon; Kim, Yong Seung; Song, In Kyu

doi:10.1016/j.molcata.2007.03.016

Cited by 31 publications

(7 citation statements)

References 26 publications

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“…The total NO x concentration, which is the sum of NO and NO 2 concentrations was also decreased. The NO 2 generated was 37% of the NO removed and the remained (63%) possibly was oxidized into nitrite and nitrate ions (NO 2 − /NO 3 − ) and were fixed on the surface of the photocatalyst as was reported in previous papers [22][23][24]. Additional experiments were done in order to investigate the effect of relative humidity on the photocatalytic oxidation efficiency, and the results are shown in Fig.…”

Section: Photocatalytic Activitymentioning

confidence: 89%

Photocatalytic removal of nitric oxide by Bi2Mo3O12 prepared by co-precipitation method

Luévano-Hipólito¹,

Cruz²,

Yu³

et al. 2013

Applied Catalysis A: General

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Section: Photocatalytic Activitymentioning

confidence: 89%

Photocatalytic removal of nitric oxide by Bi2Mo3O12 prepared by co-precipitation method

Luévano-Hipólito¹,

Cruz²,

Yu³

et al. 2013

Applied Catalysis A: General

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“…Actually, adding some additives to bismuth molybdate catalysts could result in many unprecedented performance enhancements in the activity and selectivity by modifying the electronic properties of active sites, generating the “remote control effect” to facilitate the redox Mars and van Krevelen mechanism, or could even lead to reconstruction of the surface structure during the reaction. − The discussion about the catalytic activities of bismuth molybdate based catalysts seemed to cease in the early 2000s. Since the synergy effects of different compositions of gamma bismuth molybdate (γ-Bi 2 MoO 6 ) in the mixture with beta bismuth molybdate (β-Bi 2 Mo 2 O 9 ) were reported by Vieira Soares et al and followed by our group, , the discussions on the synergy effect in bismuth molybdate based catalysts were continued with more distinct interpretations . It is now generally agreed that the synergy effect occurs in mixtures containing the gamma phase of bismuth molybdate, which is known as the phase with more mobile oxygen atoms, in combination with the beta or alpha phasethe phases which provide more absorption sites for hydrocarbons.…”

Section: Introductionmentioning

confidence: 89%

Synergy Effects of the Mixture of Bismuth Molybdate Catalysts with SnO₂/ZrO₂/MgO in Selective Propene Oxidation and the Connection between Conductivity and Catalytic Activity

Hung

Truong

et al. 2016

Ind. Eng. Chem. Res.

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Bismuth molybdate catalysts have been used for partial oxidation and ammoxidation of light hydrocarbons since the 1950s. In particular, there is the synergy effect (the enhancement of the catalytic activity in the catalysts mixed from different components) in different phases of bismuth molybdate catalysts which has been observed and studied since the 1980s; however, despite it being interpreted differently by different research groups, there is still no decisive conclusion on the origin of the synergy effect that has been obtained. The starting idea of this work is to find an answer for the question: does the electrical conductivity influence the catalytic activity (which has been previously proposed by some authors). In this work, highly conductive materials (SnO 2 , ZrO 2 ) and nonconductive materials (MgO) are added to beta bismuth molybdates (β-Bi 2 Mo 2 O 9 ) using mechanical mixing, impregnation, and sol−gel methods. The mixtures were characterized by XRD, BET, XPS, and EDX techniques to determine the phase composition and surface properties. The conductivities of these samples were recorded at the catalytic reaction temperature (300−450 °C). Comparison of the catalytic activities of these mixtures showed that the addition of 10% mol SnO 2 to beta bismuth molybdate resulted in the highest activity while the addition of nonconductive MgO could not increase the catalytic activity. This shows that there may be a connection between conductivity and catalytic activity in the mixtures of bismuth molybdate catalysts and other metal oxides.

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“…Oxidative dehydrogenation of hydrocarbons is typically performed at temperatures higher than 200 °C. Mixed metal oxides represented by bismuth molybdates are generally used as catalysts for this reaction, − whereas metallic catalysts such as Pt or Pd have rarely been used. This is due to the strong oxidation ability of zerovalent metals, which causes complete combustion to CO x .…”

Section: Survey Of Intermetallic Catalystsmentioning

confidence: 99%

Intermetallic Compounds: Promising Inorganic Materials for Well-Structured and Electronically Modified Reaction Environments for Efficient Catalysis

2016

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An overview of the catalytic properties of intermetallic compounds has been made to provide a comprehensive understanding regarding (1) what intermetallic catalysts can do, (2) their fundamental roles in enhanced catalysis, and (3) their advantages over other inorganic materials. A number of chemical transformations using intermetallic catalysts have been surveyed and classified into three major divisionshydrogenation/dehydrogenation, oxidation, and steam reforming and various subsections. The fundamental roles of intermetallic phases obtained from this survey were categorized into four types of effects: (a) electronic, (b) geometric, (c) steric, and (d) ordering effects. The unprecedented steric effects governed by the specific surface structures of intermetallic compounds highlight the unique capabilities of intermetallic materials. On the basis of this overview, we have concluded that intermetallic compounds have the following advantages for fine catalyst design: (i) control of the electronic structure, (ii) a specific and ordered atomic-level structure, and (iii) homogeneity of geometric and electronic structures. Thus, intermetallic compounds are promising inorganic catalyst materials capable of creating a well-designed reaction environment and suitable for developing efficient catalytic systems.

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A synergistic effect of α-Bi2Mo3O12 and γ-Bi2MoO6 catalysts in the oxidative dehydrogenation of C4 raffinate-3 to 1,3-butadiene

Cited by 31 publications

References 26 publications

Photocatalytic removal of nitric oxide by Bi2Mo3O12 prepared by co-precipitation method

Photocatalytic removal of nitric oxide by Bi2Mo3O12 prepared by co-precipitation method

Synergy Effects of the Mixture of Bismuth Molybdate Catalysts with SnO₂/ZrO₂/MgO in Selective Propene Oxidation and the Connection between Conductivity and Catalytic Activity

Intermetallic Compounds: Promising Inorganic Materials for Well-Structured and Electronically Modified Reaction Environments for Efficient Catalysis

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A synergistic effect of α-Bi2Mo3O12 and γ-Bi2MoO6 catalysts in the oxidative dehydrogenation of C4 raffinate-3 to 1,3-butadiene

Cited by 31 publications

References 26 publications

Photocatalytic removal of nitric oxide by Bi2Mo3O12 prepared by co-precipitation method

Photocatalytic removal of nitric oxide by Bi2Mo3O12 prepared by co-precipitation method

Synergy Effects of the Mixture of Bismuth Molybdate Catalysts with SnO2/ZrO2/MgO in Selective Propene Oxidation and the Connection between Conductivity and Catalytic Activity

Intermetallic Compounds: Promising Inorganic Materials for Well-Structured and Electronically Modified Reaction Environments for Efficient Catalysis

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Product

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About

Synergy Effects of the Mixture of Bismuth Molybdate Catalysts with SnO₂/ZrO₂/MgO in Selective Propene Oxidation and the Connection between Conductivity and Catalytic Activity