Chemical hydrogen storage: ‘material’ gravimetric capacity versus‘system’ gravimetric capacity

Demirci, Umit B.; Miele, Philippe

doi:10.1039/c1ee01612a

Cited by 109 publications

(72 citation statements)

References 38 publications

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“…However, the three peaks slightly shifted to higher angles (44.6, 51.9, and 76. 4 ) for Raney Ni-40. This little shift to higher angles may be attributed to the remaining Ni-Al alloy in Raney Ni-40 catalyst because of a smaller atomic radius for Al atom.…”

Section: Resultsmentioning

confidence: 97%

“…1 Chemical hydrogen storage is thought to be one of the most promising approaches to meet this challenge, due to its considerably high gravimetric and volumetric hydrogen density. [2][3][4] Recently, hydrous hydrazine, such as hydrazine monohydrate (N 2 H 4 ÁH 2 O), was discovered as a promising hydrogen carrier material for H 2 generation at ambient temperature, because it has the following advantages: high content of usable hydrogen (e.g., 8.0 wt % for N 2 H 4 ÁH 2 O), production of CO-free hydrogen by complete decomposition, and safe for handling. 5 The decomposition of hydrazine proceeds via two typical reaction routes:…”

Section: Introductionmentioning

confidence: 99%

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H₂ production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

Huang

Wang

et al. 2013

AIChE Journal

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A noble metal-free catalyst, Raney Ni, exhibited > 99% selectivity toward H 2 for hydrous hydrazine decomposition in basic solution at 30 C. The particle size of the initial Ni-Al alloy and the concentration of additional alkali influenced the H 2 selectivity on Raney Ni catalysts. This convenient route provides great potential for industrial application of hydrous hydrazine as a promising hydrogen storage material.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

H₂ production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

Huang

Wang

et al. 2013

AIChE Journal

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“…In order to prevent confusions, it has to be emphasized that all of the terms for gas storage capacities (excess, absolute, or total) that are used here, as well as in the literature, are material-based and not system-based [9,16,18]. For practical considerations, and demanded by policy makers, are gravimetric and volumetric storage capacities which take into account the whole tank system (including the tank shell, auxiliary devices, etc.)…”

Section: Resultsmentioning

confidence: 99%

“…Currently, different concepts are used in the literature for calculating storage capacities of adsorbents, some of them being misleading. This problem also affects other storage materials in which the gas is chemically bound [18]. In the following, we present a set of relatively simple equations for calculating the excess adsorption amounts, as well as the total storage capacities on both, gravimetric and volumetric basis.…”

Section: Introductionmentioning

confidence: 99%

Adsorbent density impact on gas storage capacities

Kunowsky¹,

Suárez-Garcı́a²,

Linares‐Solano³

2013

Microporous and Mesoporous Materials

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In the literature, different approaches, terminologies, concepts and equations are used for calculating gas storage capacities. Very often, these approaches are not well defined, used and/or determined, giving rise to significant misconceptions. Even more, some of these approaches, very much associated with the type of adsorbent material used (e.g., porous carbons or new materials such as COFs and MOFs), impede a suitable comparison of their performances for gas storage applications. We review and present the set of equations used to assess the total storage capacity for which, contrarily to the absolute adsorption assessment, all its experimental variables can be determined experimentally without assumptions, ensuring the comparison of different porous storage materials for practical application. These materialbased total storage capacities are calculated by taking into account the excess adsorption, the bulk density (ρ bulk ) and the true density (ρ true ) of the adsorbent. The impact of the material densities on the results are investigated for an exemplary hydrogen isotherm obtained at room temperature and up * Tel.: +34 965 90 93 50; Fax: +34 965 90 34 54.Email address: kunowsky@ua.es (Mirko Kunowsky) February 5, 2013 to 20 MPa. It turns out that the total storage capacity on a volumetric basis, which increases with both, ρ bulk and ρ true , is the most appropriate tool for comparing the performance of storage materials. However, the use of the total storage capacities on a gravimetric basis cannot be recommended, because low material bulk densities could lead to unrealistically high gravimetric values. Preprint submitted to Microporous and Mesoporous Materials

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“…Chemical hydrogen storage appears to be one of the most promising approaches for safe and efficient hydrogen storage [1]. Searching for effective hydrogen storage materials to release hydrogen conveniently under mild conditions is attracting considerable research interest from both academia and industry [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine

Huang

Wang

et al. 2013

Journal of Catalysis

135

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Chemical hydrogen storage: ‘material’ gravimetric capacity versus‘system’ gravimetric capacity

Cited by 109 publications

References 38 publications

H₂ production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

H₂ production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

Adsorbent density impact on gas storage capacities

Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine

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Chemical hydrogen storage: ‘material’ gravimetric capacity versus‘system’ gravimetric capacity

Cited by 109 publications

References 38 publications

H2 production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

H2 production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

Adsorbent density impact on gas storage capacities

Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine

Contact Info

Product

Resources

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H₂ production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

H₂ production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions