Activation of polymer blend carbon nanofibres by alkaline hydroxides and their hydrogen storage performances

Suárez-Garcı́a, Fabián; Vilaplana-Ortego, Eduardo; Kunowsky, Mirko; Kimura, Mutsuko; Ōya, Asao; Linares-Solano, Á.

doi:10.1016/j.ijhydene.2009.09.026

Cited by 41 publications

(31 citation statements)

References 52 publications

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“…The porosity characterization is listed together with the activation yields and material densities in Table 1. For comparison purposes, Table 1 also includes the characterization results of samples obtained from steam activation [5,6] and from chemical activation [8,22]. For the ACNFs, the activation conditions can be deduced from their denomination, as it was explained earlier in Section 2.…”

Section: Textural Properties and Morphologymentioning

confidence: 99%

“…Another promising application for CNFs is hydrogen storage [13][14][15][16][17][18][19][20][21][22][23][24]. Some early works claimed groundbreaking results which generated an important interest in this field [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Activated carbon fibers processes, for example by polymer blend technique [28,29], by electrospinning [21,30,31], or by template carbonization technique [32]. Recently, a novel kind of CNFs, produced by polymer blend technique and mechanical spinning, has been used for producing highly nanoporous ACNFs adsorbents [5,6,8,22]. In difference to CNFs synthesized by other methods, the CNF-precursors feature a highly amorphous structure which substantially favors their activation [22].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a novel kind of CNFs, produced by polymer blend technique and mechanical spinning, has been used for producing highly nanoporous ACNFs adsorbents [5,6,8,22]. In difference to CNFs synthesized by other methods, the CNF-precursors feature a highly amorphous structure which substantially favors their activation [22]. From these nanofibers, Shiraishi et al…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths

Kunowsky

Marco-Lozar

Ōya

et al. 2012

Carbon

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Amorphous carbon nanofibers (CNFs), produced by the polymer blend technique, are activated by CO 2 (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), CO 2 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), V DR (CO 2 ). The obtained ACNFs have a high compressibility and, consequently, a high packing density under mechanical pressure which can also be maintained upon monolith synthesis. H 2 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, H 2 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 H 2 adsorption capacity as high as 1.3 wt.%, and a remarkable value of 1 wt.% in its mechanically resistant monolith form.

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Section: Textural Properties and Morphologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths

Kunowsky

Marco-Lozar

Ōya

et al. 2012

Carbon

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“…Carbon fibres have been studied extensively for their scientific and technological importance and are finding application in many fields including catalysis [1], composites [2][3][4], filtration [5][6][7], and alternative energy technologies [8]. Carbon fibres are advantageous due to being a light weight material with a high specific modulus and strength, good thermal/electrical conductivity and being structurally stable against various environmental changes [2,9].…”

Section: Introductionmentioning

confidence: 99%

Electrospun green fibres from lignin and chitosan: a novel polycomplexation process for the production of lignin-based fibres

et al. 2014

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Novel lignin-chitosan polyelectrolyte fibres were produced through a reactive electrospinning process. Polyelectrolyte formation between the anionic lignin and cationic chitosan was controlled through the pH of the solution. Through manipulating the polyelectrolyte complex formation, fibres could be effectively produced from two biopolymers, which are normally very difficult to electrospin on their own. Though minimal amounts of the petroleum-derived polyethylene oxide were introduced into the solution to enhance the spinnability of the polyelectrolyte solution, it could be easily removed from the fibres post spinning by washing with water. Thus, pure biopolymer fibres could be produced. The optimum composition of lignin to chitosan was identified through SEM, FTIR and TGA analysis of the electrospun fibres. Fluorescence spectra of the electrospun fibres reveal the homogeneous distribution of lignin and chitosan components throughout the fibre network.

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Hydrogen storage in carbon materials—A review

et al. 2019

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It is well known that three challenges of hydrogen economy, that is, production, storage, and transportation or application put tremendous stress on scientific community for the past several decades. Based on several investigations, reported in literature, it is observed that the storage of hydrogen in solid form is more suitable option to overcome the challenges like its storage and transportation. In this form, hydrogen can be stored by absorption (metal hydrides and complex hydrides) and adsorption (carbon materials). Compared to absorption, adsorption of hydrogen on carbon materials is observed to be more favorable in terms of storage capacity. Taking in to account of these facts, in this short review, an overview on hydrogen adsorption on activated carbon and different allotropes of carbon like graphite, carbon nanotubes, and carbon nanofibers is presented. Synthesis processes of all the carbon materials are discussed in brief along with their hydrogen storage capacities at different operating conditions, and thermodynamic properties and reaction kinetics. In addition, different methods to improve hydrogen storage capacities of carbon materials are presented in detail. Finally, comparison is made between different carbon materials to estimate the amount of hydrogen that can be stored and retract practically. The experimentally measured maximum hydrogen storage capacity of activate carbon, graphite, single‐walled nanotubes, multiwalled nanotubes, and carbon nanofibers at room temperature are 5.5 wt%, 4.48 wt%, 4.5 wt%, 6.3 wt%, and 6.5 wt%, respectively.

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Activation of polymer blend carbon nanofibres by alkaline hydroxides and their hydrogen storage performances

Cited by 41 publications

References 52 publications

Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths

Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths

Electrospun green fibres from lignin and chitosan: a novel polycomplexation process for the production of lignin-based fibres

Hydrogen storage in carbon materials—A review

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