Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 496783
Title Separation and characterisation of sulphur-free lignin from different agricultural residues
Author(s) Rossberg, Christine; Bremer, Martina; Machill, Susanne; Koenig, Swetlana; Kerns, Gerhard; Boeriu, Carmen; Windeisen, Elisabeth; Fischer, Steffen
Source Industrial Crops and Products 73 (2015). - ISSN 0926-6690 - p. 81 - 89.
DOI http://dx.doi.org/10.1016/j.indcrop.2015.04.001
Department(s) FBR Sustainable Chemistry & Technology
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) Agricultural residue - Lignin - Pretreatment - Wheat straw
Abstract

Wheat straw, as one of the most abundant agricultural residues in Europe, was subjected to alkaline pulping, microwave-assisted alkaline pulping and organosolv pulping using formic acid and hydrogen peroxide. The obtained lignins were characterised by means of Klason-lignin, FT-IR spectroscopy, elementary analysis, thioacidolysis, SEC and different wet chemical methods. The emphasis here was on their structural differences, especially the content of functional groups like total hydroxyl, phenolic hydroxyl, carboxyl, carbonyl and methoxyl groups.In addition, numerous agricultural residues, for example barley straw, maize straw, sunflower stalks and horse manure, were characterised and subjected to alkaline pulping, which was carried out based on the optimum parameters found for wheat straw: θ=. 160. °C, t=. 30. min and ω(NaOH). =. 3. wt%. The examined raw materials showed different suitability for lignin separation using this pretreatment. The resulting lignins were characterised with the methods described above and were classified into three groups within which lignins show similar characteristics. By this, lignin with interesting structural features could be proposed for further studies.

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