Efficient hydrodeoxygenation of lignin-derived phenols and dimeric ethers with synergistic [Bmim]PF₆-Ru/SBA-15 catalysis under acid free conditions

Abstract

Selective catalytic hydrotreatment of lignin-derived phenols and dimeric ethers into alkanes is crucial for utilization of lignin and its fragments.

Physicochemical Properties of Various 2-Hydroxyethylammonium Sulfonate -Based Protic Ionic Liquids and Their Potential Application in Hydrodeoxygenation

“…Hydrodeoxygenation (HDO) is an important way to catalyze the conversion of lignin and its derivatives into high-calorific alkane. In this process, deoxygenation is crucial as it makes the whole reaction possible (Chen et al, 2016, 2017; Yang et al, 2019). Brønsted acid (like phosphoric acid), as a deoxidizer, is indispensable for facilitating the deoxygenation reaction in most catalytic systems (Güvenatam et al, 2014; Chen et al, 2016).…”

Photoinduced transition-metal- and external-photosensitizer-free intramolecular aryl rearrangement via C(Ar)–O bond cleavage

“… 7 This strategy was recently used to accomplish the challenging task of cleaving the 4-O-5 linkage of a lignin model compound, despite the fact that this diaryl ether C(Ar)–O bond has a high dissociation energy and good stability. 8 In addition, we reported the Pd/C-catalyzed conversion of diaryl ethers to amines via a process involving C(Ar)–O bond cleavage and C–N bond formation. 9 …”

Functionalized Silicas for Metal‐Free and Metal‐Based Catalytic Applications: A Review in Perspective of Green Chemistry

“…The non‐FSs have formed the composites with the polymers containing significant functional groups. Of late, the polymers such as aquivion perfluorosulfonic acid, polypyrrole, polyaniline, chitosan, polyethyleneimine, polyacrylonitrile, triphenylphosphine polymer, IL polymer and polydopamine are coupled with non‐FS for the preparation of composites . In this case, the obtained silica material may be called as pseudo‐FS.…”

“…As far as the enzymes immobilized on FSs concerned, they are catalytically active in diverse reactions including esterification, chemical syntheses, hydrolysis, oxidation, dyes degradation, deacetylation, protein digestion, resolution of racemic compounds . The immobilized enzymes have shown better performance than free enzymes in chosen catalytic reactions . FSs with relatively large pores and hydrophobic groups like phenyl or ethyl in the backbone have promoted the activity of immobilized enzymes.…”

“…The functional groups (−NH 2 ) of chitosan have involved the chemical interaction with hyaluronan which helps in the enzyme immobilization (Scheme ). Here, the polysaccharides are coated one over the other through layer by layer approach …”