Reversible hydrogen storage in Ti–Zr-codoped NaAlH4 under realistic operation conditions: Part 2

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Reversible hydrogen storage in Ti–Zr-codoped NaAlH4 under realistic operation conditions: Part 2. / Schmidt, Thomas; Röntzsch, Lars; Weißgärber, Thomas; Kieback, Bernd.

in: Journal of Alloys and Compounds, Jahrgang 509, Nr. SUPPL. 2, 09.2011, S. S740-S742.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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@article{4be893a44d5146e092fd37d92fb77aec,
title = "Reversible hydrogen storage in Ti–Zr-codoped NaAlH4 under realistic operation conditions: Part 2",
abstract = "Recently, we have demonstrated that the dehydrogenation of NaAlH4 can be carried out with sufficient kinetics even at a hydrogen back pressure of 4 bar, which is needed for a proton exchange membrane (PEM) fuel cell [10]. In this contribution the influence of hydrogen back pressure in the range of 0.2 up to 5 bar and catalyst concentration in the range between 1 and 5 wt.% overall catalyst concentration on the dehydrogenation of Zr–Ti codoped NaAlH4 is investigated in detail. The influence of the hydrogen back-pressure is significant in the 2nd dehydrogenation step. The catalyst concentration influences both kinetics and storage capacity. Rate constants as a function of the temperature and hydrogen back-pressure and activation energies of the dehydrogenation of NaAlH4 to Na3AlH6 at 1 bar and 4 bar hydrogen pressure are calculated from isothermal dehydrogenation experiments.",
keywords = "Chemistry, Alanate, Sodium aluminum hydride, Codoping, Ti, Zr, Realistic operation conditions, Activation energy, Energy research, Hydrogen storage, PEM fuel cell, Back pressure, Rate constants, Sustainability Science",
author = "Thomas Schmidt and Lars R{\"o}ntzsch and Thomas Wei{\ss}g{\"a}rber and Bernd Kieback",
note = "Proceedings of the 12th International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications (MH2010)",
year = "2011",
month = sep,
doi = "10.1016/j.jallcom.2010.10.183",
language = "English",
volume = "509",
pages = "S740--S742",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier B.V.",
number = "SUPPL. 2",

}

RIS

TY - JOUR

T1 - Reversible hydrogen storage in Ti–Zr-codoped NaAlH4 under realistic operation conditions: Part 2

AU - Schmidt, Thomas

AU - Röntzsch, Lars

AU - Weißgärber, Thomas

AU - Kieback, Bernd

N1 - Proceedings of the 12th International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications (MH2010)

PY - 2011/9

Y1 - 2011/9

N2 - Recently, we have demonstrated that the dehydrogenation of NaAlH4 can be carried out with sufficient kinetics even at a hydrogen back pressure of 4 bar, which is needed for a proton exchange membrane (PEM) fuel cell [10]. In this contribution the influence of hydrogen back pressure in the range of 0.2 up to 5 bar and catalyst concentration in the range between 1 and 5 wt.% overall catalyst concentration on the dehydrogenation of Zr–Ti codoped NaAlH4 is investigated in detail. The influence of the hydrogen back-pressure is significant in the 2nd dehydrogenation step. The catalyst concentration influences both kinetics and storage capacity. Rate constants as a function of the temperature and hydrogen back-pressure and activation energies of the dehydrogenation of NaAlH4 to Na3AlH6 at 1 bar and 4 bar hydrogen pressure are calculated from isothermal dehydrogenation experiments.

AB - Recently, we have demonstrated that the dehydrogenation of NaAlH4 can be carried out with sufficient kinetics even at a hydrogen back pressure of 4 bar, which is needed for a proton exchange membrane (PEM) fuel cell [10]. In this contribution the influence of hydrogen back pressure in the range of 0.2 up to 5 bar and catalyst concentration in the range between 1 and 5 wt.% overall catalyst concentration on the dehydrogenation of Zr–Ti codoped NaAlH4 is investigated in detail. The influence of the hydrogen back-pressure is significant in the 2nd dehydrogenation step. The catalyst concentration influences both kinetics and storage capacity. Rate constants as a function of the temperature and hydrogen back-pressure and activation energies of the dehydrogenation of NaAlH4 to Na3AlH6 at 1 bar and 4 bar hydrogen pressure are calculated from isothermal dehydrogenation experiments.

KW - Chemistry

KW - Alanate

KW - Sodium aluminum hydride

KW - Codoping

KW - Ti

KW - Zr

KW - Realistic operation conditions

KW - Activation energy

KW - Energy research

KW - Hydrogen storage

KW - PEM fuel cell

KW - Back pressure

KW - Rate constants

KW - Sustainability Science

UR - http://www.scopus.com/inward/record.url?scp=80052818840&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2010.10.183

DO - 10.1016/j.jallcom.2010.10.183

M3 - Journal articles

VL - 509

SP - S740-S742

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - SUPPL. 2

ER -

DOI