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Characterization and Comparison of Fast Pyrolysis Bio-oils from Pinewood, Rapeseed Cake, and Wheat Straw Using 13C NMR and Comprehensive GC × GC.


ABSTRACT: Fast pyrolysis bio-oils are feasible energy carriers and a potential source of chemicals. Detailed characterization of bio-oils is essential to further develop its potential use. In this study, quantitative 13C nuclear magnetic resonance (13C NMR) combined with comprehensive two-dimensional gas chromatography (GC × GC) was used to characterize fast pyrolysis bio-oils originated from pinewood, wheat straw, and rapeseed cake. The combination of both techniques provided new information on the chemical composition of bio-oils for further upgrading. 13C NMR analysis indicated that pinewood-based bio-oil contained mostly methoxy/hydroxyl (?30%) and carbohydrate (?27%) carbons; wheat straw bio-oil showed to have high amount of alkyl (?35%) and aromatic (?30%) carbons, while rapeseed cake-based bio-oil had great portions of alkyl carbons (?82%). More than 200 compounds were identified and quantified using GC × GC coupled to a flame ionization detector (FID) and a time of flight mass spectrometer (TOF-MS). Nonaromatics were the most abundant and comprised about 50% of the total mass of compounds identified and quantified via GC × GC. In addition, this analytical approach allowed the quantification of high value-added phenolic compounds, as well as of low molecular weight carboxylic acids and aldehydes, which exacerbate the unstable and corrosive character of the bio-oil.

SUBMITTER: Negahdar L 

PROVIDER: S-EPMC5027642 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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Characterization and Comparison of Fast Pyrolysis Bio-oils from Pinewood, Rapeseed Cake, and Wheat Straw Using <sup>13</sup>C NMR and Comprehensive GC × GC.

Negahdar Leila L   Gonzalez-Quiroga Arturo A   Otyuskaya Daria D   Toraman Hilal E HE   Liu Li L   Jastrzebski Johann T B H JT   Van Geem Kevin M KM   Marin Guy B GB   Thybaut Joris W JW   Weckhuysen Bert M BM  

ACS sustainable chemistry & engineering 20160729 9


Fast pyrolysis bio-oils are feasible energy carriers and a potential source of chemicals. Detailed characterization of bio-oils is essential to further develop its potential use. In this study, quantitative <sup>13</sup>C nuclear magnetic resonance (<sup>13</sup>C NMR) combined with comprehensive two-dimensional gas chromatography (GC × GC) was used to characterize fast pyrolysis bio-oils originated from pinewood, wheat straw, and rapeseed cake. The combination of both techniques provided new in  ...[more]

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