Extraction and characterization of the cellolose and lignin from plant Mischantus x giganteus

Bačinić, Anđela (2016) Extraction and characterization of the cellolose and lignin from plant Mischantus x giganteus. Diploma thesis, Faculty of Science > Department of Chemistry.

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Abstract

Main components of lignocellulosic biomass lignin and cellulose were extracted from the plant Miscanthus x giganteus. The obtained mass fraction of cellulose and lignin were 68.51 % and 27.34 %, respectively. Owing to the large mass fraction of cellulose, from which bioethanol is produced by hydrolysis and fermentation, the plant Miscanthus x giganteusis is suitable raw material for the production of biofuels. In order to determine concentration of K+, Na+ and Cl-, which may form deposits, powders or agglomerates during combustion process, ion chromatography was used. The obtained ion masses of K+, Na+, Cl- per weight of biomass kilogram were 5287 mg, 2 mg and 674 mg, respectively. By using inductively coupled plasma optical emission spectrometry (ICP-OES), concentrations of microelements and macroelements in biomass were determined, since they are toxic and may form residues. Infrared (IR) and nuclear magnetic resonance (NMR) spectroscopies were applied to identify and structurally characterized samples of lignin and cellulose. IR spectrum recorded by using KBr pellets in the middle IR region (4000 cm−1 to 400 cm−1) displayed vibrational modes characteristic of lignin and cellulose. 1H NMR and DOSY spectra recorded in DMSO-d6 have confirmed the presence of lignin and cellulose in the samples. Furthermore, spectra in the solid state were also recorded by using 13C CP/MAS NMR technique. All recorded spectra were compared with those reported in the literature.

Item Type: Thesis (Diploma thesis)
Keywords: biofuel, IC, ICP-OES, IR, lignocellulosic biomass, Miscanthus giganteus, NMR
Supervisor: Novak, Predrag and Parlov Vuković, Jelena
Date: 2016
Number of Pages: 63
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Faculty of Science > Department of Chemistry
Depositing User: Branka Maravic
Date Deposited: 21 Oct 2016 09:27
Last Modified: 21 Oct 2016 09:27
URI: http://digre.pmf.unizg.hr/id/eprint/5208

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