Noemí Gil-Lalaguna

@article{fonts_bio-oil_2024,

title = {Bio-oil Fractionation According to Polarity and Molecular Size: Characterization and Application as Antioxidants},

author = {Isabel Fonts and Cristina Lázaro and Alfonso Cornejo and José Luis Sánchez and Zainab Afailal and Noemí Gil-Lalaguna and Jesús Arauzo},

url = {https://doi.org/10.1021/acs.energyfuels.4c02641},

doi = {10.1021/acs.energyfuels.4c02641},

issn = {0887-0624},

year  = {2024},

date = {2024-09-01},

urldate = {2024-09-01},

journal = {Energy & Fuels},

abstract = {Bio-oil obtained from biomass pyrolysis has great potential for several applications after being upgraded and refined. This study established a method for separating bio-oil into different fractions based on polarity and molecular size to extract phenolic and polyphenolic compounds with antioxidant properties. The fractions were analyzed using various spectroscopic and chromatographic techniques, such as GC/MS, FTIR, UV–vis, SEC, DOSY-NMR, 13C-NMR, and 31P-NMR. The antioxidant properties of these fractions were tested by examining their ability to improve the oxidative stability of biodiesel. The results strongly connected the bio-oil’s chemical functionalities and antioxidant power. During solvent fractionation, dichloromethane could extract phenolic structures, which were subsequently size-fractionated. The subfractions with lower molecular weight (in the order of monomers and dimers) outperformed the antioxidant potential of the crude bio-oil. Heavier subfractions from dichloromethane extraction did not show good antioxidant abilities, which was related to the low hydroxy group content. After solvent extraction, phenolic oligomers remained in the water-insoluble/dichloromethane-insoluble fraction, which showed good antioxidant potential despite its low solubility in biodiesel.},

note = {Publisher: American Chemical Society},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{afailal_production_2023,

title = {Production of Antioxidant Additives and High-quality Activated Biochar from Pyrolysis of Argan Shells},

author = {Zainab Afailal and Noemí Gil-Lalaguna and Robert J. Macías and Alberto Gonzalo and José Luis Sánchez},

url = {https://doi.org/10.1007/s12155-023-10652-0},

doi = {10.1007/s12155-023-10652-0},

issn = {1939-1242},

year  = {2023},

date = {2023-08-01},

urldate = {2023-08-01},

journal = {BioEnergy Research},

abstract = {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.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Afailal2023,

title = {Thermochemical valorization of argan nutshells: Torrefaction and air–steam gasification},

author = {Zainab Afailal and Noemí Gil-Lalaguna and Isabel Fonts and Alberto Gonzalo and Jesús Arauzo and José Luis Sánchez},

url = {https://linkinghub.elsevier.com/retrieve/pii/S0016236122027946},

doi = {10.1016/J.FUEL.2022.125970},

issn = {0016-2361},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Fuel},

volume = {332},

pages = {125970},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Gil-Lalaguna2022,

title = {CO2 adsorption on pyrolysis char from protein-containing livestock waste: How do proteins affect?},

author = {Noemí Gil-Lalaguna and África Navarro-Gil and Hans-Heinrich Carstensen and Joaquín Ruiz and Isabel Fonts and Jesús Ceamanos and María Benita Murillo and Gloria Gea},

doi = {10.1016/J.SCITOTENV.2022.157395},

issn = {0048-9697},

year  = {2022},

date = {2022-11-01},

urldate = {2022-11-01},

journal = {Science of The Total Environment},

volume = {846},

pages = {157395},

publisher = {Elsevier},

abstract = {Biogas generation through anaerobic digestion provides an interesting opportunity to valorize some types of animal waste materials whose management is increasingly complicated by legal and environmental restrictions. To successfully expand anaerobic digestion in livestock areas, operational issues such as digestate management must be addressed in an economical and environmentally sustainable way. Biogas upgrading is another necessary stage before intending it to add-value applications. The high concentration of CO2 in biogas results in a reduced caloric value, so the removal of CO2 would be beneficial for most end-users. The current work evaluates the CO2 uptake properties (thermogravimetry study) of low-cost adsorbent materials produced from the animal wastes generated in the livestock area itself, specifically via pyrolysis of poorly biodegradable materials, such as meat and bone meal, and the digestate from manure anaerobic digestion. Therefore, the new element in this study with respect to other studies found in the literature related to biochar-based CO2 adsorption performance is the presence of high content of pyrolyzed proteins in the adsorbent material. In this work, pyrolyzed chars from both meat and bone meal and co-digested manure have been proven to adsorb CO2 reversibly, and also the chars produced from their representative pure proteins (collagen and soybean protein), which were evaluated as model compounds for a better understanding of the individual performance of proteins. The ultra-microporosity developed in the protein chars during pyrolysis seems to be the main explanation for such CO2 uptake capacities, while neither the BET surface area nor N-functionalities on the char surface can properly explain the observed results. Although the CO2 adsorption capacities of these pristine chars (6–41.0 mg CO2/g char) are far away from data of commercially activated carbons ($sim$80 mg CO2/g char), this application opens a new via to integrate and valorize these wastes in the circular economy of the primary sector.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Afailal2021,

title = {Antioxidant Additives Produced from Argan Shell Lignin Depolymerization},

author = {Zainab Afailal and Noemí Gil-Lalaguna and María Teresa Torrijos and Alberto Gonzalo and Jesús Arauzo and José Luis Sánchez},

url = {https://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.1c01705},

doi = {10.1021/ACS.ENERGYFUELS.1C01705},

year  = {2021},

date = {2021-01-01},

journal = {Energy & Fuels},

publisher = {American Chemical Society},

abstract = {The present work summarizes the results of an experimental study focused on producing antioxidant additives for biofuels from argan shell lignin. The generation of this waste has noticeably increas...},

keywords = {},

pubstate = {published},

tppubtype = {article}

}