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Bayreuth, Germany

Paggiaro R.,TU Munich | Michl F.,FutureCarbon GmbH | Benard P.,University of Quebec | Polifke W.,TU Munich
International Journal of Hydrogen Energy | Year: 2010

This paper presents an investigation of the thermal effects during high pressure filling of a cryo-adsorptive hydrogen storage tank. The adsorbent is powdered activated carbon. A two-dimensional model is formulated, which describes hydrodynamics, heat transfer and adsorption phenomena in cylindrical tanks. Experiments with a tank containing about 10 kg of adsorbent were carried out to parameterize and validate the model. Good agreement between experiments and simulations could be obtained. Numerical results are then presented concerning filling processes. Two cooling concepts are investigated: a LN2 cooling jacket and a recirculation system which uses the hydrogen itself as the cooling fluid. The results show that short filling times can only be achieved with the recirculation system. © 2009 Professor T. Nejat Veziroglu. Source


Schweiss R.,SGL Carbon GmbH | Steeb M.,SGL Carbon GmbH | Wilde P.M.,SGL Carbon GmbH | Schubert T.,FutureCarbon GmbH
Journal of Power Sources | Year: 2012

Microporous layers (MPLs) of gas diffusion layers (GDLs) were modified by multiwall carbon nanotubes (MWCNTs) using a wet-chemical approach. Carbon nanotubes were dispersed along with other MPL components and coated onto a GDL backing. The electronic resistance of the GDL was significantly reduced by the addition of MWCNTs. A larger mean pore diameter was obtained as compared to the reference substrates. The improved performance of proton exchange membrane fuel cells (PEMFCs) using such CNT-doped GDLs is attributed to a lower electronic resistance along with improved mass transport. Synergy effects of different carbon materials with MWCNTs and advanced dispersion processes were found to play a key role in achieving the performance improvements. © 2012 Elsevier B.V. All rights reserved. Source


Grant
Agency: Cordis | Branch: FP7 | Program: MC-IAPP | Phase: FP7-PEOPLE-2009-IAPP | Award Amount: 520.12K | Year: 2010

The principal focus of this project is to synthesise carbon nanomaterials and composites with enhanced mechanical and electrical performance using a novel alternative technology. Carbon nanoparticles and polymer composites are formed from the dissociation of critically opalescent fluids via a UV laser. The aim is to produce such materials in a continuous process where the produced material or composite material is synthesised with its final desirable properties in a single to low number of chemistry steps. The project explores the potential of this novel process for the production of new carbon nanomaterials in close collaboration between an academic partner and an SME with the objectives to produce various carbon nanostructures from critically opalescent fluids, to produce carbon nanomaterials with increased electric conductivity, to produce composite materials with improved mechanical properties, to characterise the properties of the produced carbon nanomaterials, to optimise the process conditions and control the resulting structure of the carbon materials, to develop processes suitable for industrial application, to establish new links between academia and SME, to provide access to academic knowledge and infrastructure to industrial partner and vice versa, and to provide staff in industry and academia with transferable skills. The work programme to achieve these goals includes production of novel carbon nanomaterials from carbon dioxide in batch process (specifically carbon nanotubes, carbon nanofibres, carbon platelets, graphene, carbon layers with controlled dielectric properties, and cross-linked polymer composites), construction of a carbon dioxide reactor system for continuous flow process, production of carbon nanomaterials in continuous flow process, analysis of novel carbon nanomaterials, market analysis, risk assessment, selection and optimization of processes for scale-up, and an intensive knowledge transfer programme.


The present invention relates to a method for producing carbon nanomaterials and/or carbon micromaterials, in particular multi-wall carbon nanotubes. The method is characterized according to the invention in that at least one molecule that has a reactive group in terminal position is bound to the surface of the material. In addition, the invention also relates to a correspondingly modified material.


Patent
University Breman Bccms, Neue Materialien Fürth GmbH and FutureCarbon GmbH | Date: 2013-04-19

An electric heating device (

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