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Humin based by-products from biomass processing as a potential carbonaceous source for synthesis gas production.
- Source :
- Green Chemistry; 2015, Vol. 17 Issue 2, p959-972, 14p
- Publication Year :
- 2015
-
Abstract
- Lignocellulosic biomass is addressed as potential sustainable feedstock for green fuels and chemicals. (Hemi)cellulose is the largest constituent of the material. Conversion of these polysaccharides to bio-based platform chemicals is important in green chemical/fuel production and biorefinery. Hydroxymethyl furfural, furfural and levulinic acid are substantial building blocks from (poly)saccharides. Synthesis of these molecules involves acid catalysed hydrolysis/dehydration reactions which leads large formation of insoluble by-products, called humins. Humin obtained from dehydration of glucose is used in this study. Fractionisation of humin was investigated using various solvents (e.g., acetone, H<subscript>2</subscript>O, and NaOH 1%). Characterisation of humin using various techniques including ATR-IR, HR-SEM, solid state NMR, elemental analysis, Raman spectroscopy, pyrolysis, etc. confirms its furan rich structure with aliphatic oxygenate linkages. The influence of thermal treatment on humin was investigated. Humin undergoes a lot of changes both in morphology and structure. Humin loses ca. 45 wt% when preheated to 700 °C (prior to the gasification temperature) and contains above 92 wt% C in mainly aromatic/graphitic structures. Valorisation of humin via dry reforming was studied. Non-catalytic dry reforming of humin is very difficult; however, alkali catalysts (e.g. Na<subscript>2</subscript>CO<subscript>3</subscript>) can enhance the reaction rate tremendously. [ABSTRACT FROM AUTHOR]
- Subjects :
- HUMINS
BIOMASS
HEMICELLULOSE
LIGNOCELLULOSE
POLYSACCHARIDES
RAMAN spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 17
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 100937935
- Full Text :
- https://doi.org/10.1039/c4gc01324g