Modification of a magnesium?Molybdenum olefin oxidation catalyst by alkali additives

Vorob'eva, G. A.; Rozentuller, B.V.; Maksimov, Yu. V.; Kutyrev, M. Yu.; Margolis, L. Ya.

doi:10.1016/0021-9517(81)90244-x

Cited by 9 publications

(3 citation statements)

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“…These mechanistic insights have been largely derived by model studies using simplified materials, whose relevance remains to be proven. Moreover, little is known about the mechanistic roles of the K-promoter ( 18 , 19 ). Here, we reveal the structure of industrial MCM catalysts and provide mechanistic explanation about how the complex structural features are linked to the performance.…”

Section: Introductionmentioning

confidence: 99%

Architecture of industrial Bi-Mo-Co-Fe-K-O propene oxidation catalysts

Amakawa,

Mauß,

Müller

et al. 2023

Sci. Adv.

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Industrial heterogeneous catalysts show high performance coupled with high material complexity. Deconvoluting this complexity into simplified models eases mechanistic studies. However, this approach dilutes the relevance because models are often less performing. We present a holistic approach to reveal the origin of high performance without losing the relevance by pivoting the system at an industrial benchmark. Combining kinetic and structural analyses, we show how the performance of Bi-Mo-Co-Fe-K-O industrial acrolein catalysts occurs. The surface BiMoO ensembles decorated with K supported on β-Co 1− x Fe x MoO 4 perform the propene oxidation, while the K-doped iron molybdate pools electrons to activate dioxygen. The nanostructured vacancy-rich and self-doped bulk phases ensure the charge transport between the two active sites. The features particular to the real system enable the high performance.

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Section: Introductionmentioning

confidence: 99%

Architecture of industrial Bi-Mo-Co-Fe-K-O propene oxidation catalysts

Amakawa,

Mauß,

Müller

et al. 2023

Sci. Adv.

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“…From an industrial point of view, the most effective catalysts for the oxidation of low molecular weight olefins are multicomponent systems (Grasselli and Burrington, 1981; Cullis and Hucknall, 1982;Sant et al, 1984). The catalytic systems used for the oxidation of C3 and C4 olefins are similar, although in the case of oxidation of isobutene to methacrolein, various different catalyst compositions have been used (Vorob'eva et al, 1981;Linde et al, 1983).…”

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confidence: 99%

“…This is probably due to the complexity of the systems; the dependence of methacrolein formation on the partial pressure of isobutene or oxygen yields apparent reactions orders varying between one and zero for both reactants. Multicomponent oxide systems based on molybdenumiron oxides have been extensively used in the selective oxidation of olefins (Kremenic et al, 1973;Vorob'eva et al, 1981; Maksimov et al, 1983;Zhurmukhtashvili et al, 1984). In previous work in our laboratory, it has been found that a mixed molybdenum-iron-tellurium-cobalt oxide catalyst supported on silica is active and selective in the propene oxidation for acrolein (Kremenic et al, 1981(Kremenic et al, , 1986a.…”

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confidence: 99%