127983 20241125101159.0 doi 10.1007/s12155-023-10652-0 sideral 135092 ART-2023-135092 eng Afailal, Zainab (orcid)0000-0002-9091-672X Production of Antioxidant Additives and High-quality Activated Biochar from Pyrolysis of Argan Shells 2023 Access copy available to the general public Unrestricted An integral valorization route based on a pyrolysis process has been proposed to find sustainable applications for argan shells focused on the simultaneous production of activated biochar and antioxidant additives from bio-oil. The bio-oil obtained in the pyrolysis process was furtherly upgraded (hydrothermal treatment and extraction process) to obtain antioxidant additives. On the other hand, the biochar obtained in the pyrolysis was used as a feedstock to produce high-quality activated biochar (by physical activation with CO2). The increase in the pyrolysis temperature (350–550 °C) hardly affected the pyrolysis products distribution (biochar yields of 28–34 wt.% and bio-oil yields between 51 and 55 wt.%), but it led to a slight decrease in the content of phenolic monomers extracted from bio-oil (from 63 wt.% at 350 °C to 53 wt.% at 550 °C). When these extracted fractions were blended with biodiesel (<1 wt.%), improvements of up to 300% in biodiesel oxidation stability were attained. The hydrothermal treatment of the bio-oil did not show noteworthy effects either on the production or antioxidant performance of the extracted fractions if compared with the fractions extracted from the raw bio-oil. Regarding the valorization of argan shells biochar, the activated biochar prepared from it showed considerable potential as an adsorbent material for CO2 (125 mg of CO2 per g of the activated biochar) or phenols (complete removal of 99.6% in 4 h of contact time). It was characterized by a high BET surface area (up to 1500 m2/g), a high carbon content (up to 95 wt.%), low ash content (around 2 wt.%), and a pH of around 8. info:eu-repo/grantAgreement/ES/AEI/PID2020-114936RB-I00 info:eu-repo/grantAgreement/ES/DGA-FEDER/T22-20R info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.1 2023 ENVIRONMENTAL SCIENCES 167 / 358 = 0.466 2023 Q2 T2 ENERGY & FUELS 105 / 171 = 0.614 2023 Q3 T2 0.647 2023 Agronomy and Crop Science 2023 Q1 Renewable Energy, Sustainability and the Environment 2023 Q2 Energy (miscellaneous) 2023 Q2 6.7 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Gil-Lalaguna, Noemí Universidad de Zaragoza (orcid)0000-0002-8704-9274 Macías, Robert J. Gonzalo, Alberto Universidad de Zaragoza (orcid)0000-0001-8960-2689 Sánchez, José Luis Universidad de Zaragoza (orcid)0000-0002-9705-2207 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 5005 790 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Tecnologi. Medio Ambiente 17 (2023), 453–466 BIOENERGY RESEARCH BIOENERGY RESEARCH 1939-1234 1330683 http://zaguan.unizar.es/record/127983/files/texto_completo.pdf Versión publicada 2508144 http://zaguan.unizar.es/record/127983/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:127983 articulos driver 2024-11-22-12:10:51 ARTICLE