Formic-acid-induced using recyclable-ionic liquids as catalysts for lignin conversion into aromatic co-products

TitleFormic-acid-induced using recyclable-ionic liquids as catalysts for lignin conversion into aromatic co-products
Publication TypeJournal Article
Year of Publication2019
AuthorsSingh, SK, Dhepe, PL
JournalWaste and Biomass Valorization
Date PublishedNOV
Type of ArticleArticle; Early Access
ISSN1877-2641
KeywordsBulk and molecular levels analysis, depolymerization, Dual functionalized ionic liquids, Formic acid, lignin
Abstract

Lignin has been widely named as a sustainable and renewable bioresource of energy, fuels, chemicals and materials, particularly phenolic chemicals production on Earth. These bio-derived compounds are in great potential need of biorefinery to valorize complete plant biomass. Lignin depolymerization showed a great promise approach to convert into low molecular aromatic products. In this report, high molecular weight (54,000 Da) lignin depolymerization into maximum yields (87%), (>= 95 +/- 6% mass balance) using a formic acid along with dual (-SO3H) functionalized imidazole-based recyclable (4 times) Bronsted acidic ionic liquids (BAILs) as catalysts have been investigated in H2O-CH3OH (1:5, v/v) at 120 degrees C for 1 h. The structural correlations between the lignin and aromatic products were studied by bulk (CHNS, GPC, etc.) and molecular (UV-Vis, FT-IR, NMR (1D/2D) levels experimental techniques. Additionally, the identification of aromatic products was carried out by applying HPLC, GC and GC-MS techniques. Graphic Addition of a formic acid into Bronsted acidic ionic liquids improved the catalytic efficiency significantly for lignin depolymerization into 87% low molecular weight aromatic products. [GRAPHICS] .

DOI10.1007/s12649-019-00896-3
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

1.874

Divison category: 
Catalysis and Inorganic Chemistry

Add new comment