Influence of activation conditions on textural properties and performance of activated biochars for pyrolysis vapors upgrading

Autor: Alain Celzard, Joan J. Manyà, Vanessa Fierro, Rafael Luan Sehn Canevesi, Christian Di Stasi, Gianluca Greco, Belén González, M. Teresa Izquierdo
Přispěvatelé: European Commission, Gobierno de Aragón, Université de Lorraine (France), Di Stasi, Christian, Greco, Gianluca, Canevesi, Rafael L. S., Izquierdo Pantoja, María Teresa, Fierro, Vanessa, Celzard, Alain, González García, Belén, Manyà, Joan J., Di Stasi, Christian [0000-0001-5266-398X], Greco, Gianluca [0000-0001-6609-1601], Canevesi, Rafael L. S. [0000-0001-9076-1265], Izquierdo Pantoja, María Teresa [0000-0002-2408-2528], Fierro, Vanessa [0000-0001-7081-3697], Celzard, Alain [0000-0003-0073-9545], González García, Belén [0000-0001-7125-4997], Manyà, Joan J. [0000-0002-0118-3254], Aragón Institute of Engineering Research [Zaragoza] (I3A), University of Zaragoza - Universidad de Zaragoza [Zaragoza], Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Instituto de Carboquimica (CSIC), Instituto de Carboquimica, Universidad Nacional de la Plata, Partenaires INRAE
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Zaguán: Repositorio Digital de la Universidad de Zaragoza
Universidad de Zaragoza
Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname
Fuel
Digital.CSIC. Repositorio Institucional del CSIC
Fuel, Elsevier, 2020, pp.119759. ⟨10.1016/j.fuel.2020.119759⟩
ISSN: 0016-2361
1873-7153
DOI: 10.1016/j.fuel.2020.119759⟩
Popis: 8 figures, 4 tables. supplementary information avilable.-- © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0
The main aim of the present study is to provide a comprehensive assessment of the effects of process activation conditions on the textural properties of the resulting activated carbons, which were produced from wheat straw-derived biochar through chemical activation (with K2CO3 at different pressures and mass impregnation ratios) and physical activation (with CO2 at different temperatures and pressures). For chemically activated biochars, it was found that specific surface area and pore size distribution were both only positively affected by increasing the carbonate loading. However, physically activated biochars produced at the highest pressure and lowest temperature (1.0 MPa and 700 °C) had the highest surface areas and widest pore size distributions. The materials with the most appropriate textural properties were then tested as catalysts for steam and dry reforming of the aqueous phase of pyrolysis oil. The best catalytic performance (a total gas yield of 74% and a selectivity toward H2 of almost 40%) was observed for a physically activated biochar. This good performance was ascribed to the high availability of K0 on the catalyst surface, which could effectively promote the reactions involved in the upgrading process.
This project received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 721991. The authors also acknowledge the funding from the Aragón Government (Ref. T22_20R), co-funded by FEDER 2014-2020 “Construyendo Europa desde Aragón”. This study was partly supported by the French PIA project “Lorraine Université d’Excellence”, reference ANR-15-IDEX-04-LUE, PROMOTEE project and TALiSMAN project, funded by FEDER (2019-000214).
Databáze: OpenAIRE
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