Highly efficient catalytic transfer hydrogenolysis for the conversion of Kraft lignin into bio-oil over heteropoly acids

Abstract

Catalytic transfer hydrogenolysis (CTH) has emerged as a sustainable and carbon-neutral biorefinery due to the decrease in the carbon footprint and the high atom and energy efficiency. Herein, heteropoly acids...

Enhanced lignin depolymerisation to produce butylated hydroxytoluene and 4-propylguaiacol on carbon-nitride supported molybdenum catalysts

“…The efficient liquefaction of lignin in isopropanol was related to the distinguished hydrogen donating ability of isopropanol. 34 Considering the possibility of industrial application, ethanol solution is probably the most suitable solvent due to its excellent liquefaction capacity and relatively lower price.…”

Perspective on oligomeric products from lignin depolymerization: their generation, identification, and further valorization

“…Their FT-ICR-MS showed that the signal at m / z was over 500 and weakened after the hydrogenolysis of the Kraft lignin. 113 Song et al employed the Maldi-TOF technique to analyze oligomeric fractions from lignin alcoholysis (methanol) and indicated that the depolymerized products with molecular weight from m / z ca. 1100 to ca.…”

“…3 Molecular weight distribution (Maldi-TOF-MS) or the average molecular weight (GPC or FT-ICR-MS with the double bond equivalent value) for the products from various lignin depolymerization processes. 7,9,33,55,98,[109][110][111]113,114,[116][117][118][119][120][121][122][123][124] Industrial Chemistry & Materials Review parameters, such as T1 and T2 relaxation rates, carbon pulse offset effects, and multiplicity and magnitude of coupling constants. 129,130 Fig.…”

“…90 It is noteworthy that all these available standards may not well simulate the oligomeric products from lignin depolymerization because these oligomers often contain only a minor amount or none of the β-O-4, as reported in the literature. 113,126,170 Therefore, more efforts should be made to establish databases specially designed for depolymerized oligomers, in which computational simulations are needed to generate hypothetical structures.…”

Polyoxometalate as an Effective Catalyst for Catalytic Lignin into Value‐Added Molecules

“…These acids are extensively utilized in the delignification of lignocellulosic pulp and as redox catalysts for the hydrogenolysis/hydrodeoxygenation (HDO) of lignin [29,30] . In the context of lignin hydrogenolysis, POMs have been used as cocatalysts with Pd/C to deter the condensation reaction [31,32] . However, the need to master the synthetic parameters remains imperative to fully leverage the potential of POMs and to design materials with synergetic capabilities.…”