Potential and challenges of zeolite chemistry in the catalytic conversion of biomass

Ennaert, Thijs; Aelst, Joost Van; Dijkmans, Jan; Clercq, Rik De; Schutyser, Wouter; Dusselier, Michiel; Verboekend, Danny

doi:10.1039/c5cs00859j

Cited by 635 publications

(431 citation statements)

References 404 publications

(605 reference statements)

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“…[11][12][13][14] These types of heterogeneous catalysts are already playing a relevant role in several biomass valorization processes (including lignocellulosic biomass), as can be seen from the numerous scientific reports and literature revisions dedicated to this topic. [15][16][17][18][19][20][21][22][23] Nonetheless, most of the reviews currently available in the literature are focused on the utilization and potential of inorganic metal oxides (either pure or mixed metal oxides) and zeolites for biomass transformation (and derived platform molecules), and less attention has been given to LDH-type and derived catalysts.…”

Section: Introductionmentioning

confidence: 99%

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

et al. 2017

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Layered double hydroxides (LDHs) and derived materials have been widely used as heterogeneous catalysts for different types of reactions either in gas or in liquid phase. Among these processes, the valorization/upgrading of lignocellulosic biomass and derived molecules have attracted enormous attention because it constitutes a pivotal axis in the transition from an economic model based on fossil resources to one based on renewable biomass resources with preference for biomass waste streams. Proof of this is the increasing amount of literature reports regarding the rational design and implementation of LDHs and related materials in catalytic processes such as: depolymerization, hydrogenation, selective oxidations, and C-C coupling reactions, among others, where biomass-derived compounds are used. The major aim of this contribution is to situate the most recent advances on the implementation of these types of catalysts into a lignocellulosic-feedstock biorefinery scheme, highlighting the versatility of LDHs and derived materials as multifunctional, tunable, cheap and easy to produce heterogeneous catalysts.

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Section: Introductionmentioning

confidence: 99%

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

et al. 2017

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“…[3][4][5][6] This reaction is catalyzed by Lewis acids, and the most studied catalyst is Sn-Beta zeolite. 7,8 The unique activity of Sn-Beta zeolite for the isomerization and retro-aldolization of carbohydrates ( Fig. 1) stems from the strong Lewis acid Sn sites embedded in the framework of Beta zeolite.…”

Section: Introductionmentioning

confidence: 99%

Influence of pore topology on synthesis and reactivity of Sn-modified zeolite catalysts for carbohydrate conversions

Graaff

Tempelman

Pidko

et al. 2017

Catal. Sci. Technol.

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A range of Sn-modified MWW, MFI, MOR and Beta zeolites were prepared by a post-synthetic Sn functionalization method and their catalytic properties for sugar conversions were evaluated. The focus of this work was to understand the effect of micropore dimensions and additional mesoporosity on the Sn incorporation and on the catalytic properties. The post-synthetic approach, which involves aciddealumination of the parent zeolite followed by SnCl 4 grafting, is highly efficient for the selective incorporation of lattice Sn sites in wide-pore Beta and MOR zeolites. The modification of the medium-pore MWW and MFI is impaired by the more difficult dealumination and hence the lower efficiency of the Sn incorporation. Hierarchical structuring of the zeolites allows the increase of the Sn loading in the final zeolites. The catalytic properties were assessed in the isomerization and retro-aldolization reactions of glucose and the conversion of 1,3-dihydroxyacetone to methyl lactate. The catalytic results depend strongly on the structural and topological properties of the catalysts as well as on the reactant. Glucose isomerization carried out at a relatively low temperature is mainly limited by strong adsorption of carbohydrates to the active sites. This explains why zeolite nanostructuring had little effect on the catalyst activity, which instead depends mainly on the zeolite topology and the nature of the reactive Sn centers. The influence of pore size is most pronounced for Sn-MWW and Sn-MFI zeolites which are inactive in glucose-to-fructose isomerization, but perform in the higher-temperature retro-aldolization of carbohydrates with an activity similar to that of Sn-Beta. Because of the limited accessibility of the Sn sites inside the 1D MOR pore system, Sn-MOR catalysts were only moderately active in all probe reactions considered.

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“…Additionally we investigated the reactions under the action of zeolite CBV-720, since zeolites are considered as “green” catalysts in organic synthesis [60–66] and the data are collected in Table 4. Similarly to the reaction with benzene (Table 3), 1a with other arenes yielded 5-arylmethylfurfurals 3b–o in TfOH or with zeolite CBV-720.…”

Section: Resultsmentioning

confidence: 99%

Superelectrophilic activation of 5-hydroxymethylfurfural and 2,5-diformylfuran: organic synthesis based on biomass-derived products

Ryabukhin¹,

Zakusilo

Kompanets³

et al. 2016

Beilstein J. Org. Chem.

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SummaryThe reaction of 5-hydroxymethylfurfural (5-HMF) with arenes in superacidic trifluoromethanesulfonic acid (triflic acid, TfOH) as the solvent at room temperature for 1–24 h gives rise to 5-arylmethylfurfurals (yields of 17–91%) and 2-arylmethyl-5-(diarylmethyl)furans (yields of 10–37%). The formation of these two types of reaction products depends on the nucleophilicity of the arene. The same reactions under the action of acidic zeolites H-USY in high pressure tubes at 130 °C for 1 h result in the formation of only 5-arylmethylfurfurals (yields of 45–79%). 2,5-Diformylfuran (2,5-DFF) in the reaction with arenes under the action of AlBr3 at room temperature for 1 h leads to 5-(diarylmethyl)furfurals (yields of 51–90%). The reactive protonated species of 5-HMF and 2,5-DFF were characterized by NMR spectroscopy in TfOH and studied by DFT calculations. These reactions show possibilities of organic synthesis based on biomass-derived 5-HMF and 2,5-DFF.

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Potential and challenges of zeolite chemistry in the catalytic conversion of biomass

Cited by 635 publications

References 404 publications

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

Influence of pore topology on synthesis and reactivity of Sn-modified zeolite catalysts for carbohydrate conversions

Superelectrophilic activation of 5-hydroxymethylfurfural and 2,5-diformylfuran: organic synthesis based on biomass-derived products

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