Sustainable conversion of Pinus pinaster wood into biofuel precursors: A biorefinery approach

FUEL

卷:164

Article

Rivas, Sandra^1,2  Raspolli-Galletti, Anna Maria³  Antonetti, Claudia³  Santos, Valentin^1,2  Carlos Parajo, Juan^1,2 

[1] Univ Vigo, Dept Chem Engn, As Lagoas 32004, Ourense, Spain

[2] Univ Vigo, CITI, San Cibrao Das Vinas 32901, Ourense, Spain

[3] Univ Pisa, Dept Chem & Ind Chem, I-56124 Pisa, Italy

关键词: Cellulose;    Formic acid;    Hemicellulosic sugars;    Levulinic acid;    Pinus pinaster;    Wood;   

DOI  :  10.1016/j.fuel.2015.09.085

来源: Elsevier

【 摘 要 】

Pinus pinaster wood was fractionated by aqueous treatments to yield a solution containing hemicellulosederived saccharides (mainly of polymeric or oligomeric nature) and a solid phase enriched in cellulose and lignin. The solution containing polymeric or oligomeric hemicellulosic saccharides was acidified with sulfuric acid (up to 4 wt%) and heated (up to 130 degrees C) to assess the conversion of substrates into sugars. The interpretation of the experimental data was done on the basis of a mechanism involving 10 first-order, kinetic parameters. Almost total saccharification was achieved under a range of operational conditions, and the hydrolyzates presented compositions favorable for their further utilization as fermentation media. The solid phase coming from aqueous processing was mixed with HCl solutions and reacted under microwave irradiation to yield the target products levulinic acid (precursor of valeric biofuels) and formic acid (suitable for fuel cell devices). The effects of the most influential parameters (temperature, reaction time and acid concentration) were assessed by empirical modeling. The highest cellulose conversion into levulinic acid (61.9% of the stoichiometric value as an average) was achieved at 190 degrees C operating for 15 min in a medium containing 1 wt% HCl. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

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