Catalytic performance of MnFeSi composite in selective oxidation of styrene, ethylbenzene and benzyl alcohol

Oliveira, Ana Paula S.; Gomes, Igor S.; Neto, Antonio S. Brito; Oliveira, Alcinéia C.; Filho, J. Mendes; Saraiva, G.D.; Soares, J.M.; Tehuacanero-Cuapa, Samuel

doi:10.1016/j.mcat.2017.04.007

Cited by 44 publications

(28 citation statements)

References 36 publications

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“…The literature reports that the Raman spectra of γ-Fe 2 O 3 and Fe 3 O 4 have similar features and phonon modes are indeed very close [12]. Therefore, these oxides may appear concomitantly, as seen in XRD spectra.…”

Section: Structure By Xrd and Ramanmentioning

confidence: 75%

“…According to the findings, the modes attributed to being from Co 3 O 4 arise at 482 (E g ), 519 (A 1g ), and 621 and 690 cm −1 (F 2g ) [12]. Thus, the absence of Co-related phase modes in all spectra indicates that cobalt would coexist with Fe-related phases, but the intensity of the latter species is too weak to be measured.…”

Section: Structure By Xrd and Ramanmentioning

confidence: 86%

“…The morphology of the material is of utmost importance for designing catalysts for oxidation reactions [12,15]. SEM images of the FCS series of solids are illustrated in the panels (Figure 1a).…”

Section: Physicochemical Properties Of the Synthesized Solidsmentioning

confidence: 99%

“…With a low cost-effective Reaction II is another pathway for styrene oxidation reaction leading to the formation of valuable chemical products such as 2-phenylehtnol, 2-phenyl acetic acid, 2-phenyl acetaldehyde, acetophenone, and ethylbenzene. These products have wide applications in the manufacture of perfumes, dyestuff, pharmaceuticals, and agrochemicals and in organic synthesis [12,15]. The use of FeCo-based catalysts in Reaction I has become an area of growing interest, since the solids exhibit promising catalytic activity and can be easily isolated from the reaction products [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…The use of FeCo-based catalysts in Reaction I has become an area of growing interest, since the solids exhibit promising catalytic activity and can be easily isolated from the reaction products [16,17]. On the contrary, they present the possibility of deactivation via phase transformation, sintering, or leaching of the active phases occurring during the reaction [12]. It has also been shown that the addition of promoters (i.e., Te, Mn, Mo, Sb, Co, or V) to Fe-based catalysts, particularly Co, is a great approach to have reoxidation couples and hence provide a redox stabilization of Fe oxidation states to enhance selectivities of desired products [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Styrene Oxidation to Valuable Compounds over Nanosized FeCo-Based Catalysts: Effect of the Third Metal Addition

et al. 2017

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Nanosized FeCo-based solids were prepared via distinct preparation procedures. The catalytic performances of the solids for styrene oxidation in the presence of hydrogen peroxide were evaluated. The addition of promoters in FeCo such as Sn, Mo, or Cu was also investigated. The catalysts were characterized with XRD, Raman spectroscopy, TEM, chemical analyses, EPR and SEM-EDS. Of these solids obtained via four different methods, the catalyst prepared via the NC and CM procedures enabled a partial incorporation of the Sn into the FeCo matrix forming a very active phase, namely the Heusler alloy. This was ascribed to the high initial dispersion of Sn as a promoter into the FeCo matrix, which led to available FeCoSn (FCS) particles well dispersed and stable on the catalyst surface. In the case of incorporating Mo or Cu to the nanosized FeCo catalyst, a poor stability towards leaching was observed when operating under the same reaction conditions. Cu was much less active than both Sn and Mo, mainly leading to acetophenone, ethylbenzene, 2-phenyl ethanol, 2-phenyl acetic acid, and 2-phenyl acetaldehyde products. The best catalytic results under the optimized reaction conditions, especially at 50 • C and styrene/H 2 O 2 molar ratio of 1 were achieved with nanosized FCS. This solid had a conversion of ca. 70% and selectivity for aldehydes of ca. 27%, and the selectivity for the condensation products was 29%.

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Section: Structure By Xrd and Ramanmentioning

confidence: 75%

Section: Structure By Xrd and Ramanmentioning

confidence: 86%

Section: Physicochemical Properties Of the Synthesized Solidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Styrene Oxidation to Valuable Compounds over Nanosized FeCo-Based Catalysts: Effect of the Third Metal Addition

et al. 2017

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Synthesis of polymer‐silica hybrid‐supported catalysts for solvent‐free oxidation of ethylbenzene with TBHP

Chaudhary

Sharma

2020

Asia-Pacific J Chem Eng

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Polymer-silica hybrid support was synthesized, and Cu (II), Co (II), Mn (II), and Ni (II) metals were loaded over hybrid support by incipient impregnation method. Oxidation of ethylbenzene was performed for catalytic evaluation of catalysts at different reaction conditions, that is, the mole ratio of ethylbenzene to TBHP and reaction temperature. The main reaction product was acetophenone along with benzaldehyde as the minor product. The highest ethylbenzene conversion (96.5%) was attained at a 1:3 mole ratio of ethylbenzene to TBHP and temperature at 100 C. Activation energy and reusability of the catalysts were also determined, and results showed that they can be easily reused three times without much loss in their structural and catalytic properties.

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Recent Investigation on Epoxidation of Styrene with Hydrogen Peroxide by Heterogeneous Catalysis

Wang

Lyu

et al. 2021

ChemistrySelect

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Since epoxidation of styrene with H 2 O 2 by heterogeneous catalysis can, with eco-friendliness and high efficiency, yield original styrene oxide, which is a significant bulk and fine chemical acting as crucial intermediate in wide field including perfume, food industry, UV absorber, epoxy resins thinner, plasticizers, etc., it wins promising prospect and considerable concern. This paper has reviewed the different types of catalysts applied in styrene epoxidation with H 2 O 2 in heterogeneous phase. They are metal nanoparticles, metal oxides nanoparticles, anchored transition metal complexes, heteroge-neous polyoxometallates, anchored ionic liquid, microporous and mesoporous materials, layered double hydroxides. This paper has also summarized predecessors' works from various aspects including preparation of catalyst, catalyst activity, physical and chemical factors relate to catalyst activity, kinetics, reaction mechanism. This paper has exhibited panoptic research situation. It can provide reference for future enhancement on the target reaction and construction of tandem reaction that combines styrene epoxidation with in situ generation of H 2 O 2 from H 2 and O 2 .

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Catalytic performance of MnFeSi composite in selective oxidation of styrene, ethylbenzene and benzyl alcohol

Cited by 44 publications

References 36 publications

Styrene Oxidation to Valuable Compounds over Nanosized FeCo-Based Catalysts: Effect of the Third Metal Addition

Styrene Oxidation to Valuable Compounds over Nanosized FeCo-Based Catalysts: Effect of the Third Metal Addition

Synthesis of polymer‐silica hybrid‐supported catalysts for solvent‐free oxidation of ethylbenzene with TBHP

Recent Investigation on Epoxidation of Styrene with Hydrogen Peroxide by Heterogeneous Catalysis

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