ZnCl 2 induced catalytic conversion of softwood lignin to aromatics and hydrocarbons
Selective cleavage of C-O-C bonds in lignin without disrupting C-C linkages can result in releasing aromatic monomers and dimers that can be subsequently converted into chemicals and fuels. Results showed that both biomass-derived lignin and lignin model compounds were depolymerized in a highly concentrated ZnCl2 solution. Zn2+ ions in highly concentrated ZnCl2 solutions appeared to selectively coordinate with C-O-C bonds to cause key linkages of lignin much easier to cleave. In 63 wt.% ZnCl2 solution at 200 °C for 6 h, nearly half of the softwood technical lignin was converted to liquid products, of which the majority was alkylphenols. Results indicated that most β-O-4 and Cmethyl-OAr bonds of model compounds were cleaved undersame conditions, providing a foundation towards understanding lignin depolymerization in a concentrated ZnCl2 solution. The phenolic products were further converted into cyclic hydrocarbons via hydrodeoxygenation and coupling reactions by co-catalyst Ru/C.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1255401
- Report Number(s):
- PNNL-SA-115052; 48664; KP1704020
- Journal Information:
- Green Chemistry, Journal Name: Green Chemistry Journal Issue: 9 Vol. 18; ISSN 1463-9262
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
Similar Records
2.3.4.100 - Lignin Utilization
Nucleophilic Thiols Reductively Cleave Ether Linkages in Lignin Model Polymers and Lignin
Conference
·
Tue Apr 18 00:00:00 UTC 2023
·
OSTI ID:1971862
Nucleophilic Thiols Reductively Cleave Ether Linkages in Lignin Model Polymers and Lignin
Journal Article
·
Wed Jul 15 00:00:00 UTC 2020
· ChemSusChem
·
OSTI ID:1680057