Insights into the catalytic activity and surface modification of MoO₃ during the hydrodeoxygenation of lignin-derived model compounds into aromatic hydrocarbons under low hydrogen pressures

Abstract

MoO3 is an effective catalyst for the hydrodeoxygenation (HDO) of lignin-derived oxygenates to generate high yields of aromatic hydrocarbons without ring-saturated products.

Hydrodeoxygenation of Lignin-Derived Phenols: From Fundamental Studies towards Industrial Applications

“…It was also observed that when the other hydroxyl was in the meta position, degree of HDO was much higher (Table 1, entry 7). The products in the HDO of guaiacol, phenol and anisole are mainly aromatic compounds, such as benzene and toluene at high temperatures, whereas cyclohexane can be formed below 340 °C over catalysts exhibiting hydrogenation activity, such as supported Ni, Rh, ReOx, CoNx and MoO3 [36,37,43,62,63].…”

“…ReOx/CNFox, 50 bar, cyclohexane [37], 5. MoO3, 1 bar, benzene [36], for anisole 6. ReOx/CNFox, 50 bar, cyclohexane [37], 7.…”

“…ReOx/CNFox, 50 bar, cyclohexane [37], 7. MoO3, 1 bar, benzene [36], 8. MoO3/ZrO2, 60 bar, benzene [39], 9.…”

“…Rh/ZrO2+aluminosilicate, 40 bar, cyclohexane [45], 14. MoO3, 1 bar, cyclohexane, [36], 15. Ni/SiO2-ZrO2, 50 bar, cyclohexane [62], 16.…”

Depolymerization Pathways for Branching Lignin Spirodienone Units Revealed with ab Initio Steered Molecular Dynamics

“…Hydrodeoxygenation or metabolic engineering 3,[13][14][15] approaches have been pursued to increase the value of these bio oils, but the pyrolysis step alone is energy intensive. Thus, depolymerization of unprocessed lignin remains of significant interest 8,16 and has been pursued experimentally with polyoxometalate catalysts 17 , base-catalyzed hydrolysis [18][19] , acidolysis [20][21] , ionic liquid treatment 22 , reduction with hydrosilanes 23 , photochemical degradation 24 , and ball milling 25 .…”