Tandem dehydration–transfer hydrogenation reactions of xylose to furfuryl alcohol over zeolite catalysts

Abstract

Dehydration and transfer hydrogenation tandem reactions of xylose to furfuryl alcohol in water/isopropanol were performed on MFI, FAU and BEA zeolites.

Towards the Green Synthesis of Furfuryl Alcohol in A One-Pot System from Xylose: A Review

“…An interesting effect that was studied in the article shows the role of isolated metal centers, which afford the production of xylitol, whereas the presence of sole acid sites leads to the formation of FUR. A following paper from the same research group reported a high selectivity to FuOH (75%) over a metal-free catalyst (zeolite beta) via MPV [82]. This high selectivity to FuOH was linked to the configuration of tetrahedral-framework Al centers tailored by the Al-O-Si bond distance and the characteristic typology of the catalyst.…”

“…Nevertheless, solid catalysts offer advantages such as easy recovery and regeneration. A reaction mechanism for the MPV reduction step was proposed by Paulino et al [82]. In the tandem reaction, xylose is dehydrated to FUR on the zeolite Brønsted acid sites.…”

Zein nanofibers via deep eutectic solvent electrospinning: tunable morphology with super hydrophilic properties

“…Figure 4 shows the FTIR spectrum of electrospun C-Zein and DES-Zein nanofibers. C-Zein showed a significant peak at 3,289 cm −1 due to -NH stretching, while DES- www.nature.com/scientificreports/ Zein showed intensive and broad stretching peak at 3,303 cm −1 due to the strong hydrogen bonding between -OH from Choline chloride/furfuryl-alcohol moiety and -NH from Zein polymer 15,16,22 . The intense bands at 2,875 cm −1 and 2,960 cm −1 due to the asymmetric and symmetric C-H stretching in the spectrum of DES-Zein nanofibers, which may be due to the induced dipole moment caused by the change in solvent polarity comparing to C-Zein nanofibers.…”

“…The mass 40 ± 0.2 mg of DES-Zein nanofibers was shacked in glass tube filled with 5 mL of Reactive black 5 dye solution at room temperature. Dye adsorption values were then checked at different intervals (0, 5,8,12,15,18,20, and 25) min 44,45 .…”

Catalytic Upgrading of Biomass‐Derived Sugars with Acidic Nanoporous Materials: Structural Role in Carbon‐Chain Length Variation

“…To replace the use of H 2 gas and a noble metal, an alternative strategy of transfer hydrogenation with an alcohol (preferentially 2‐propanol) as a hydrogen source that relied on Meerwein–Ponndorf–Verley (MPV) reduction has been developed for the synthesis of furfuryl alcohol directly from xylose. Acidic zeolites with different framework topologies (i.e., MFI, FAU, and BEA) were used to catalyze the cascade conversion of xylose dehydration and successive transfer hydrogenation of furfural with 2‐propanol as a hydrogen donor in a mixture of water and 2‐propanol (1:1 v/v) at 130 °C . It was found that BEA zeolite afforded an excellent selectivity (i.e., 75 %) toward furfuryl alcohol at 12.5 % xylose conversion after 1 h. The authors noted that the BEA‐type topology, with a large 3D pore structure, along with tetrahedral Al species within the framework generated by Al−O−Si distances, were responsible for the remarkable catalytic performance of BEA zeolite.…”