Comparison of different pretreatment methods for lignocellulosic materials. Part II: Influence of pretreatment on the properties of rye straw lignin

Several processes have been suggested to convert various types of lignocellulosic biomass into lignin products and saccharides. This paper evaluates the suitability of an organosolv process, a process using soda, a hydrothermal process and a process developed in this work, called the “Aquasolve proc...

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Bibliographic Details
Published in:Bioresource technology 2011-03, Vol.102 (5), p.4157-4164
Main Authors: Wörmeyer, Kai, Ingram, Thomas, Saake, Bodo, Brunner, Gerd, Smirnova, Irina
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Aquasolve
Ashes
beta-Glucosidase - metabolism
Biological and medical sciences
Carbohydrates
Chromatography, Gel
Dioxanes
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Hydrolysis
LHW
Lignin
Lignin - isolation & purification
Lignin - metabolism
Lolium - metabolism
Magnetic Resonance Spectroscopy
Organosolv
Penicillium - metabolism
Pretreatment
Recovery
Refuse Disposal - methods
Rye
Size exclusion chromatography
Specifications
Straw
Temperature
Thermogravimetry
Use of agricultural and forest wastes. Biomass use, bioconversion
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Summary:Several processes have been suggested to convert various types of lignocellulosic biomass into lignin products and saccharides. This paper evaluates the suitability of an organosolv process, a process using soda, a hydrothermal process and a process developed in this work, called the “Aquasolve process” for inclusion into a lignocellulosic biorefinery concept. Part II of this paper investigates the influence of the different pretreatment processes on the properties of rye straw lignin and evaluates their ability to produce high recoveries of high quality lignin. Specifications for high quality lignin products are defined and the isolated lignin fractions are analysed by Klason lignin, carbohydrate and ash content, elemental analysis, thermo-gravimetric analysis, 31P NMR, and size exclusion chromatography. The organosolv process shows the largest lignin recovery, followed by the soda and Aquasolve processes. Lignin products from the soda process, the Aquasolve process and with reservation the organosolv process show interesting properties for polymer applications.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2010.11.063