Lewis acidity induced heteropoly tungustate catalysts for the synthesis of 5-ethoxymethyl furfural from fructose and 5-hydroxymethylfurfural

Kumari, Priyanka; Rao, B. V.; Padmakar, D.; Pasha, Nayeem; Lingaiah, N.

doi:10.1016/j.mcat.2018.01.034

Cited by 38 publications

(22 citation statements)

References 37 publications

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“… 74 , 75 Besides, another less-intense band at 1485 cm –1 originates from pyridine associated with both Lewis and Bronsted acidic sites (L + B). 76 All the bands are thermally stable at 200 °C, which suggests that the acidic sites present in the nanosheets remain intact.…”

Section: Resultsmentioning

confidence: 98%

Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO₂

et al. 2022

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Peculiar physicochemical properties of two-dimensional (2D) nanomaterials have attracted research interest in developing new synthetic technology and exploring their potential applications in the field of catalysis. Moreover, ultrathin metal oxide nanosheets with atomic thickness exhibit abnormal surficial properties because of the unique 2D confinement effect. In this work, we present a facile and general approach for the synthesis of single crystalline and ultrathin 2D nanosheets assembly of scrutinyite-SnO 2 through a simple solvothermal method. The structural and compositional characterization using X-ray diffraction (Rietveld refinement analysis), high-resolution transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and so on reveal that the as-synthesized 2D nanosheets are ultrathin and single crystallized in the scrutinyite-SnO 2 phase with high purity. The ultrathin SnO 2 nanosheets show predominant growth in the [011] direction on the main surface having a thickness of ca. 1.3 nm. The SnO 2 nanosheets are further employed for the regioselective Friedel–Crafts acylation to synthesize aromatic ketones that have potential significance in chemical industry as synthetic intermediates of pharmaceuticals and fine chemicals. A series of aromatic substrates acylated over the SnO 2 nanosheets have afforded the corresponding aromatic ketones with up to 92% yield under solvent-free conditions. Comprehensive catalytic investigations display the SnO 2 nanosheet assembly as a better catalytic material compared to the heterogeneous metal oxide catalysts used so far in the view of its activity and reusability in solvent-free reaction conditions.

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Section: Resultsmentioning

confidence: 98%

Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO₂

et al. 2022

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“…Reprinted (adapted) with permission from [12]. Copyright (2019) American Chemical Society selectivity in various reaction processes [13][14][15][16][17][18]. Kumari et al [13] conducted HMF etherification over Ta exchanged tungstophosphoric acid with SnO 2 support as the catalyst, the EMF yield was 90.2%.…”

Section: Feedstocksmentioning

confidence: 99%

“…Copyright (2019) American Chemical Society selectivity in various reaction processes [13][14][15][16][17][18]. Kumari et al [13] conducted HMF etherification over Ta exchanged tungstophosphoric acid with SnO 2 support as the catalyst, the EMF yield was 90.2%. A 91% of EMF yield was reached from HMF used Cs 2 STA as the catalyst in ethanol by Raveendra et al [18] as well.…”

Section: Feedstocksmentioning

confidence: 99%

Recent progress in the development of advanced biofuel 5-ethoxymethylfurfural

et al. 2020

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Biomass-derived 5-ethoxymethylfurfural (EMF) with excellent energy density and satisfactory combustion performance holds great promise to meet the growing demands for transportation fuels and fuel additives to a certain extent. In this review, we summarized the relative merits of the EMF preparation from different feedstocks, such as platform chemicals, biomass sugars and lignocellulosic biomass. Advances for EMF synthesis over homogeneous (i.e. inorganic acids and soluble metal salts), heterogeneous catalysts (i.e. zeolites, heteropolyacidbased hybrids, sulfonic acid-functionalized catalysts, and others) or mixed-acid catalysts were performed as well. Additionally, the emerging development for the EMF production was also evaluated in terms of the different solvents system (i.e. single-phase solvents, biphasic solvents, ionic liquids, and deep eutectic solvents). It is concluded with current challenges and prospects for advanced biofuel EMF preparation in the future.

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“…However, these catalytic systems show very low HMF conversion efficiencies and low EMF yields with longer reaction times. In particular, beta Zeolite (BEA300), TaTPA/ SnO 2 , H 4 1,2,12,13,[20][21][22][23][24][25] However, these catalysts suffer from chemical instability in prolonged usage, poor catalytic activity, toxicity, and high costs that hinder the commercial production of EMF from HMF. Recently, many research efforts both in industry and academia have focused on the development of novel catalysts from various waste streams, as equivalent to these commercial catalysts with an ability to overcome these shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Highly selective etherification of fructose and 5‐hydroxymethylfurfural over a novel Pd‐Ru/MXene catalyst for sustainable liquid fuel production

Govindan

Krishnamoorthy

Hai

et al. 2021

Intl J of Energy Research

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Sustainable liquid fuel production from bio-oil compounds has attracted considerable attention in recent years. The catalytic etherification of 5-hydroxymethylfurfural (HMF) to ethoxymethylfurfural (EMF) is an effective approach for the production of liquid fuels. However, the development of high-performance and chemically stable catalysts has remained challenging.In this work, ultra-small Pd-Ru NPs were successfully immobilized on the surfaces of 2D MXene nanosheets (Pd-Ru/MXene) via fish sperm DNA-assisted microwave process. HR-TEM imaging results with SAED analysis showed that the hexagonal closed-pack (hcp) Pd-Ru NPs were grown on the surfaces of sheet-like MXene, thus enhancing the specific surface area of 117 m 2 g −1 and providing a higher density of the acid-base sites. Furthermore, Pd-Ru/MXene was employed for the etherification of HMF into EMF. The results showed that the Pd-Ru/MXene catalyst exhibited 98% EMF yield and 100% HMF conversion with the prolonged usage of catalyst for five consecutive reuse cycles.Additionally, fructose was directly converted into EMF with a higher yield of 82% over the Pd-Ru/MXene catalyst at lower reaction conditions. The recyclability test of the used Pd-Ru/MXene catalyst demonstrated its chemical stability under prolonged usage for several hours and is therefore suitable for commercial renewable liquid fuel production. Novelty Statement• The catalytic transformation of biomass into diesel-miscible biofuel is a sustainable route for liquid fuel production and has recently attracted massive attention.• The chemically stable and high-performance Pd-Ru/MXene catalyst was successfully prepared and characterized.

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Lewis acidity induced heteropoly tungustate catalysts for the synthesis of 5-ethoxymethyl furfural from fructose and 5-hydroxymethylfurfural

Cited by 38 publications

References 37 publications

Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO₂

Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO₂

Recent progress in the development of advanced biofuel 5-ethoxymethylfurfural

Highly selective etherification of fructose and 5‐hydroxymethylfurfural over a novel Pd‐Ru/MXene catalyst for sustainable liquid fuel production

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Lewis acidity induced heteropoly tungustate catalysts for the synthesis of 5-ethoxymethyl furfural from fructose and 5-hydroxymethylfurfural

Cited by 38 publications

References 37 publications

Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO2

Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO2

Recent progress in the development of advanced biofuel 5-ethoxymethylfurfural

Highly selective etherification of fructose and 5‐hydroxymethylfurfural over a novel Pd‐Ru/MXene catalyst for sustainable liquid fuel production

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Product

Resources

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Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO₂

Regioselective Friedel–Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO₂