scholarly journals MEASUREMENT OF THE ABSORPTION-BASED HYDROGEN STORAGE CAPACITY OF Ti0.95Zr0.05Cr0.8Mn0.8V0.2Ni0.2 ALLOY

2020 ◽  
Vol 26 (2) ◽  
pp. 63-66
Author(s):  
Tomáš Brestovič ◽  
Natália Jasminská ◽  
Marián Lázár ◽  
Ľubica Bednárová ◽  
Romana Dobáková
Keyword(s):  
Hydrogen Absorption ◽  
Final Section ◽  
Storage Capacity ◽  
Thermodynamic Description ◽  
Indirect Measurement ◽  
Maximum Weight ◽  
Hydrogen Storage Capacity ◽  
Pressure Concentration ◽  
Desorption Cycle ◽  
Intermetallic Structure

The article describes potential application of the BCC alloy Ti0.95Zr0.05Cr0.8Mn0.8V0.2Ni0.2 in the hydrogen absorption process. It deals with the measurements of the PCI (Pressure Concentration Isotherm) characteristics applying the volumetric method. With regard to the fact that it is an indirect measurement method, the thermodynamic description was analysed in details and subsequently used to identify the weight capacity of the stored hydrogen. The article presents a detailed description of the procedure for measuring the free volume of the measuring equipment using helium which is able to penetrate into pores and apertures with the size of only a few nanometres but does not participate in the absorption into the intermetallic structure of the alloy. The hydrogen absorption into the tested alloy was initiated by repeatedly performed activation of the alloy surface. The final section of the article presents the examination of the cyclic stability of the absorption-desorption cycle within the repeated monitoring of the maximum weight capacity of the stored hydrogen.

Simulation for Hydrogen Absorption on Single Wall Carbon Nanotubes Using the First Principle

2012 ◽  
Vol 472-475 ◽  
pp. 1787-1791
Author(s):  
A Qing Chen ◽  
Qing Yi Shao ◽  
Li Wang
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Storage ◽  
Hydrogen Absorption ◽  
Density Functional ◽  
Storage Capacity ◽  
Single Wall Carbon Nanotubes ◽  
First Principle ◽  
Hydrogen Storage Capacity ◽  
Functional Theory ◽  
Single Wall Carbon

The hydrogen storage on single wall carbon is studied by using the first principle based on density functional theory (DFT). It concludes that the adsorption of hydrogen on the bare distorted single carbon nanotubes (SWNTs) can be enhanced dramatically when the single wall carbon nanotubes are rotated along the tubs axis. On the other hand, it suggests that the hydrogen storage capacity of SWNTs depend on the deformation angles.

FABRICATION AND HYDROGEN STORAGE PROPERTY OF Mg-3Ni-2MnO2-nCNTS NANOCOMPOSITES

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1467-1472
Author(s):  
HONG-FEI SUN ◽  
SHU-JIN LIANG ◽  
ZHENG-XING YU ◽  
WEN-BIN FANG
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Storage ◽  
Mechanical Milling ◽  
Hydrogen Absorption ◽  
Storage Capacity ◽  
Kinetic Property ◽  
Milling Process ◽  
Hydrogen Storage Capacity ◽  
Result Show ◽  
Storage Property

Mg -3 Ni -2 MnO 2 hydrogen storage nanocomposites added with different composition (1%~4%) carbon nanotubes (CNTs) were prepared by mechanical milling under the atmosphere of hydrogen. Different mechanical milling process parameter has been discussed in this paper. Study on hydrogen storage ability of Mg -3 Ni -2 MnO 2- nCNTs with different composition carbon nanotubes has been carried out. The result show that Mg -3 Ni -2 MnO 2- nCNTs excellent heat conductivity and good hydrogen storage (more than 6%vol) ability, the CNTs improve the mass transfer and heat transfer properties of the Mg -3 Ni -2 MnO 2, thus enhancing the kinetic property of hydrogen absorption and desorption of the hydrogen storage nanocomposites, and raising the hydrogen storage capacity. Due to the addition of the carbon nanotubes, the milling stress in the process of preparing the Mg -based namocomposites is reduced, the components can be closely bonded easily, and the additives can play better catalytic roles enhancing the kinetic property of hydrogen absorption and desorption of the hydrogen storage nanocomposites, and raising the hydrogen storage capacity. Due to the addition of the carbon nanotubes, the milling stress in the process of preparing the Mg -based namocomposites is reduced, the components can be closely bonded easily, and the additives can play better catalytic roles.

scholarly journals Development of new material for the environmental-friendly energy generation processes

2011 ◽  
Vol 43 (1) ◽  
pp. 71-79 ◽  
Author(s):  
S. Ristic ◽  
A. Jovicevic ◽  
S. Kocic ◽  
M. Spasojevic ◽  
A. Maricic
Keyword(s):  
Human Health ◽  
Hydrogen Absorption ◽  
Storage Capacity ◽  
Energy Generation ◽  
Cobalt Powder ◽  
Hydrogen Storage Capacity ◽  
Scanning Calorimetry ◽  
High Hydrogen ◽  
Pure Cobalt ◽  
New Material

The aim of this study was to develop a new material which has high hydrogen storage capacity and hydrogen absorption/desorption rate. This material, which is based on cobalt powder onto which palladium was chemically deposited can be used in environmentally friendly energy generation processes, thus ensuring preventive protection of human health. Hydrogen absorption was investigated using differential scanning calorimetry (DSC) and by measuring hydrogen pressure under isothermal and non-isothermal conditions in a chamber containing either pure cobalt powder either cobalt powder onto which palladium was chemically deposited (Co-0.003 Pd). The mechanism of hydrogen absorption has been described. It was noticed that palladium catalyses hydrogen absorption by dissociating the adsorbed H2 molecules into H atoms more rapidly on its own atoms than on cobalt ones. The catalysis of dissociation of H2 molecules enabled hydrogen absorption into Co-0.003 Pd powder to occur at lower temperatures. The results of this study enable integration of technological and public health investigation in order to ensure preventive protection of human health through enviromental protection.

scholarly journals Using Ball Milling for Modification of the Hydrogenation/Dehydrogenation Process in Magnesium-Based Hydrogen Storage Materials: An Overview

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 768 ◽  
Author(s):  
Jinzhe Lyu ◽  
Andrey Lider ◽  
Viktor Kudiiarov
Keyword(s):  
Hydrogen Storage ◽  
Ball Milling ◽  
Hydrogen Absorption ◽  
Storage Capacity ◽  
Low Cost ◽  
Temperature Limit ◽  
Computer Design ◽  
Hydrogen Storage Materials ◽  
Hydrogen Storage Capacity ◽  
Storage Materials

Magnesium-based hydrogen storage materials are considered to be one of the most promising solid-state hydrogen storage materials due to their large hydrogen storage capacity and low cost. However, slow hydrogen absorption/desorption rate and excessive hydrogen absorption/desorption temperature limit the application of magnesium-based hydrogen storage materials. The present paper reviews recent progress in improving the hydrogen storage properties by element substitution and additives. Ball milling is the promising technology for preparing magnesium-based hydrogen storage materials. The research and development of approaches for modifying magnesium-based hydrogen storage materials prepared by ball milling is systematically expounded. It is concluded that ball milling can significantly improve the kinetic and electrochemical properties of magnesium-based hydrogen storage materials and increase the hydrogen storage capacity. In the future, the research of magnesium-based hydrogen storage materials should be developed in terms of hydrogen storage mechanism, computer design of materials and development of a more optimized catalytic system.

scholarly journals Correction: Cigarette butt-derived carbons have ultra-high surface area and unprecedented hydrogen storage capacity

2021 ◽  
Author(s):  
L. Scott Blankenship
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Storage Capacity ◽  
High Surface ◽  
High Surface Area ◽  
Hydrogen Storage Capacity ◽  
Cigarette Butt ◽  
Energy Environ

Correction for ‘Cigarette butt-derived carbons have ultra-high surface area and unprecedented hydrogen storage capacity’ by L. Scott Blankenship et al., Energy Environ. Sci., 2017, 10, 2552–2562, DOI: 10.1039/C7EE02616A.

scholarly journals Enabling Storage and Utilization of Low-Carbon Electricity: Power to Formic Acid

2021 ◽  
Author(s):  
Kuo-Wei Huang ◽  
Sudipta Chatterjee ◽  
Indranil Dutta ◽  
Yanwei Lum ◽  
Zhiping Lai
Keyword(s):  
Hydrogen Storage ◽  
Formic Acid ◽  
Storage Capacity ◽  
Energy Carrier ◽  
Hydrogen Energy ◽  
Low Carbon ◽  
Hydrogen Storage Capacity ◽  
Electricity Power ◽  
Low Toxicity

Formic acid has been proposed as a hydrogen energy carrier because of its many desirable properties, such as low toxicity and flammability, and a high volumetric hydrogen storage capacity of...

Devitrification and hydrogen storage capacity of the eutectic Ca72Mg28 metallic glass

2017 ◽  
Vol 725 ◽  
pp. 916-922 ◽  
Author(s):  
K. Saksl ◽  
J. Ďurišin ◽  
D. Balga ◽  
O. Milkovič ◽  
T. Brestovič ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Hydrogen Storage ◽  
Storage Capacity ◽  
Hydrogen Storage Capacity
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