Activated Carbons Prepared through H3PO4-Assisted Hydrothermal Carbonisation from Biomass Wastes: Porous Texture and Electrochemical Performance

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Title: Activated Carbons Prepared through H3PO4-Assisted Hydrothermal Carbonisation from Biomass Wastes: Porous Texture and Electrochemical Performance
Authors: Quesada-Plata, Fabian | Ruiz-Rosas, Ramiro | Morallon, Emilia | Cazorla-Amorós, Diego
Research Group/s: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Biomass | Carbon | Hydrothermal treatments | Sustainable chemistry | Supercapacitors
Knowledge Area: Química Física | Química Inorgánica
Issue Date: Dec-2016
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Citation: ChemPlusChem. 2016, 81(12): 1349-1359. doi:10.1002/cplu.201600412
Abstract: Hydrothermal treatment of biomass in the presence of phosphoric acid is proposed for the production of activated carbons (ACs). Interestingly, H3PO4 promotes the fixation of carbon atoms in the solid during hydrothermal treatment, which renders higher preparation yields than those of the conventional impregnation method. Upon carbonisation of the resulting hydrochars at 450 °C, a notable development of porosity is achieved by using a low amount and concentration of phosphoric acid; these conditions are not adequate for conventional activation. The viability of this process for the sustainable production of ACs has been successfully checked in four biomasses of different composition and structures, and ACs of surface areas above 2000 m2 g−1 and tuneable pore size distribution have been obtained. Electrochemical characterisation of ACs prepared at 750 °C in 1 m H2SO4 demonstrates that capacitances of approximately 150 F g−1 with acceptable rate performance can be obtained through this simple method.
Sponsor: This study was supported by the Ministry of Economy and Competitiveness (MINECO) of Spain (CTQ2015-66080-R MINECO/FEDER, MAT2013-42007-P, JCI-2012-12664) and Generalitat Valenciana (GRISOLIA/2014/029, PROMETEO/2013/038 and PROMETEOII/2014/010).
ISSN: 2192-6506
DOI: 10.1002/cplu.201600412
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Peer Review: si
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INV - MCMA - Artículos de Revistas

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