Impact of pyrolysis heating methods on biochars with enhanced CO2/N2 separation and their incorporation in 3D-printed composites
Rattachement africain : pt, es, it. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
N-doped biochars, derived from chitosan sourced from waste crustaceous shells, were produced via microwave-assisted pyrolysis at temperatures ranging from 400 to 800 °C to enhance CO2 and N2 separation. Their performance was compared with biochars from conventional pyrolysis. Microwave-derived biochars exhibited superior CO2 adsorption capacity at 25 °C and 100 kPa (0.78 – 1.56 mmol g−1) compared to conventionally produced ones (0.55 – 1.43 mmol g−1). Increasing the pyrolysis temperature up to 600 °C significantly improved biochar properties, including surface area, pore volume, and CO2 adsorption capacity. Microwave-derived biochar featured enhanced surface area, larger pore volumes, and unique morphologies, requiring, on average, 61 % less preparation time. The higher ultramicroporosity and N-species concentration correlated with superior performance in the biochar produced at 600 °C. In gas mixture experiments (20 % CO2 and 80 % N2) under flow conditions, these biochars showed rapid adsorption/desorption rates due to enhanced macroporosity at samples produced at 600 and 800 °C, facilitating gas diffusion along the ultramicropores. Adsorption heat analysis indicated that the CO2 adsorption is predominantly driven by physisorption, supported by complete sample regeneration when applying N2 flux or increasing the temperature during desorption. The study also explores the feasibility of 3D-printing a composite using the most effective biochar and inorganic polymers sourced from waste, presenting potential benefits for industrial applications.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Impact of pyrolysis heating methods on biochars with enhanced CO2/N2 separation and their incorporation in 3D-printed composites
- Date Crossref
- 01/10/2024
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Aveiro CICECO - Instituto de Materiais de Aveiro pays non établi dans la noticeUniversité ou école supérieure
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Universidad de Oviedo pays non établi dans la noticeUniversité ou école supérieure
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Politecnico di Torino pays non établi dans la noticeUniversité ou école supérieure
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Italian Institute of Technology pays non établi dans la noticeStructure de recherche
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Center for Sustainable Future Technologies pays non établi dans la noticeStructure de recherche
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University of Oviedo Department of Chemical and Environmental Engineering pays non établi dans la noticeUniversité ou école supérieure
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Department of Applied Science and Technology (DISAT) pays non établi dans la noticeInstitution
CICECO - Instituto de Materiais de Aveiro — University of Aveiro, Universidad de Oviedo et Politecnico di Torino, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.