Catalytic Hydrogenolysis of Lignin into Serviceable Products

Accounts of Chemical Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

ConspectusLignin, a major component of lignocellulosic biomass, accounts for nearly 30% organic carbon on Earth, making it the most abundant renewable source aromatic carbon. The valorization lignin beyond low-value heat and power has been one foremost challenges long time. On other hand, compounds, constituting substantial segment chemical industry projected to reach market value $382 billion by 2030, are predominantly derived from fossil resources, contributing increased CO2 emissions. Integrating into supply chain will offer promising strategy reduce footprint boost economic viability biorefineries. Thus, depolymerizing biopolymers chemicals suitable downstream processing is an important starting point its valorization. However, owing lignin's complexity heterogeneity, achieving efficient selective depolymerization that yields desirable, isolable monomers remains significant scientific challenge.The structure lignins varies significantly in terms subunits linkages across plant species, leading considerable differences their reactivity, distribution resulting monomers, subsequent utilization. In this context, Account highlights our recent studies catalytic hydrogenolysis serviceable products preparing valuable materials, fuels, chemicals. First, we designed series systems specifically tailored structural features wood, grass, certain seed coats. To reliance expensive commercial catalysts like Pd/C, Ru/C, Pt/C, advanced heterogeneous metal shifting high-loaded nanostructured metals low-loaded, atomically dispersed replacing precious with nonprecious alternatives. This approach reduces cost catalysts, enhances atomic economy, improves activity and/or selectivity. Then, using developed phenolic tethering distinct side were selectively generated (from various plants), close theoretical maximum. high selectivity allowed separation purification monomeric phenols reaction mixtures readily. gain deeper insights cleavage C-O bonds, deuterium-incorporated β-O-4 mimics (dimers polymer) mechanistic study, which excluded pathways involving loss linkage protons led proposal concerted process cleavage. Finally, enable utilization depolymerized unconventional feedstocks current industry, methods transform them bioactive molecules, functional high-energy fuels. Overall, these contributions opened new avenues converting products, encompassing upstream applications.

Language: Английский

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Microbial cell factories for bioconversion of lignin to vanillin — Challenges and opportunities: A review

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 142805 - 142805

Published: April 1, 2025

Language: Английский

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Lignin valorization through the oxidative activity of β-etherases: Recent advances and perspectives

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 281, P. 136383 - 136383

Published: Oct. 11, 2024

Language: Английский

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Lignin-based cryogels for advancing sustainable crop production via enhanced nutrient accessibility and growth efficiency

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 287, P. 138613 - 138613

Published: Dec. 10, 2024

Language: Английский

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