Journal
ADVANCED SUSTAINABLE SYSTEMS
Volume 6, Issue 4, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsu.202100394
Keywords
anisole; biofuels; biomass; catalytic converters; hydrodeoxygenation; lignin; nickel
Funding
- RUDN University Strategic Academic Leadership Program
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Lignin can be upgraded to bioproducts, contributing to sustainable development. Ni-based SiO2 catalysts and scrap catalytic converters (SCATs) can boost the conversion of anisole, a model compound of lignin, under lower reaction conditions.
The large availability and renewable nature of lignin makes its upgrading to bioproducts of particular interest for sustainable development. The hydrodeoxygenation (HDO) of anisole specifically represents a model reaction for the conversion of lignin to biofuels through the removal of the aromatic carbon-oxygen bonds. To date, a range of Ni-based catalysts have been reported as highly active systems for the HDO of anisole. However, there has been a substantial lack of consideration given to the environmental characteristics of these catalytic systems, in contrast with the scope of the sustainable production of biofuels. Herein, Ni-based SiO2 catalysts are prepared by a solventless and highly efficient mechanochemistry approach, having a considerably lower environmental impact as compared to standard impregnation methods. Importantly, scrap catalytic converters (SCATs) are employed as co-catalysts, proving the possibility of enhancing the catalytic HDO of anisole, with a scarcely exploited waste material. The results demonstrate that the combined use of Ni/SiO2 as catalysts and Ni/SCATs as co-catalysts remarkably boosts the rate of the conversion of anisole up to more than 50% by achieving an almost complete conversion of anisole in only 40 min instead of at 200 degrees C and 4 MPa H-2.
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