Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths

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Title: Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths
Authors: Kunowsky, Mirko | Marco Lozar, Juan Pablo | Oya, Asao | Linares-Solano, Angel
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Gunma University. Graduate School of Engineering
Keywords: Hydrogen storage | Hydrogen adsorption | Physical activation | Carbon dioxide | Carbon nanofibre | Monolith
Knowledge Area: Química Inorgánica | Ciencia de los Materiales e Ingeniería Metalúrgica | Tecnologías del Medio Ambiente
Date Created: 7-Nov-2011
Issue Date: 16-Nov-2011
Publisher: Elsevier
Citation: KUNOWSKY, Mirko, et al. "Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths". Carbon. Vol. 50, No. 3 (March 2012). ISSN 0008-6223, pp. 1407-1416
Abstract: Amorphous carbon nanofibers (CNFs), produced by the polymer blend technique, are activated by CO2 (ACNFs). Monoliths are synthesized from the precursor and from some ACNFs. Morphology and textural properties of these materials are studied. When compared with other activating agents (steam and alkaline hydroxides), CO2 activation renders suitable yields and, contrarily to most other precursors, turns out to be advantageous for developing and controlling their narrow microporosity (< 0.7 nm), VDR(CO2). The obtained ACNFs have a high compressibility and, consequently, a high packing density under mechanical pressure which can also be maintained upon monolith synthesis. H2 adsorption is measured at two different conditions (77 K / 0.11 MPa, and 298 K / 20 MPa) and compared with other activated carbons. Under both conditions, H2 uptake depends on the narrow microporosity of the prepared ACNFs. Interestingly, at room temperature these ACNFs perform better than other activated carbons, despite their lower porosity developments. At 298 K they reach a H2 adsorption capacity as high as 1.3 wt.%, and a remarkable value of 1 wt.% in its mechanically resistant monolith form.
Sponsor: Spanish MICINN (Project MAT2009-07150) and Generalitat Valenciana and FEDER (Project PROMETEO/2009/047).
URI: http://hdl.handle.net/10045/20075
ISSN: 0008-6223 (Print) | 1873-3891 (Online)
DOI: 10.1016/j.carbon.2011.11.013
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.carbon.2011.11.013
Appears in Collections:INV - MCMA - Artículos de Revistas

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