2026-04-17T01:40:42Zhttps://recercat.cat/oai/request

oai:recercat.cat:10459.1/838832024-12-05T21:58:36Zcom_2072_3622col_2072_479130

00925njm 22002777a 4500 dc Mora, Mireia author Fàbregas, Esteve author Céspedes, Francisco author Puy, Neus author 2022-09-28T11:26:19Z 2022-09-28T11:26:19Z 2022-09-22 Value-added compounds were obtained from pine wood bio-oil, converting it into a renewable source for several chemicals: acids (acetic acid), sugars (levoglucosan), furan derivatives (furfural) and phenolics (catechol, phenol, 4-propylguaiacol, vanillin). To achieve this, firstly a comparison of a direct pyrolysis at 500 ◦C versus a twostaged pyrolysis (300 ◦C and 500 ◦C) was made. It was determined that a two-staged pyrolysis ensue in the obtainment of less complex liquid fractions since it concentrates families of compounds in different phases of biooil, facilitating their subsequent separation. Secondly, two methodologies (A and B) were designed to establish a procedure for separating the various chemical groups present in bio-oil. Methodology A consisted of a first vacuum distillation followed by an extraction process that combined an alkaline extraction and a simple extraction with ethyl acetate. Methodology B consisted of a first extraction with trioctylamine and ethyl acetate followed by a vacuum distillation and an extraction with hot water. The results showed that methodology A was better for the separation of chemical compounds from bio-oil, obtaining one fraction with the carboxylic acid content and furan derivatives, a second fraction containing the phenolic compounds and a third fraction enriched with the sugar content. We would also like to acknowledge the financial support of the LIFE Programme of the European Union for the project LIFE BIOREFFORMED (LIFE 19 ENV/ES/ 000544) and the support of the MINECO for the project PID2020- 117216RB-100 and the Group of Sensors and Biosensors of the Universitat Autonoma ` de Barcelona http://hdl.handle.net/10459.1/83883 Alkaline extraction Bio-oil Biorefinery Two-Staged Pyrolysis Vacuum distillation Value-added compounds Production and separation of value-added compounds from pine wood using pyrolysis and biorefinery techniques