Electrochemical hydrogen discharge of high-strength low alloy steel for high-pressure gaseous hydrogen storage tank: Effect of discharging temperature

Nam, Tae Heum; Kim, Jung Gu; Choi, Yoon Seok

doi:10.1016/j.ijhydene.2012.10.100

Cited by 10 publications

(2 citation statements)

References 31 publications

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“…The technical challenge of low-temperature compression storage lies in the design and development of high-pressure storage containers [126]. Currently, there are four main processes for storage containers: pure metal processes, outsourced glass processes used in combination with steel containers, composite packaging and metal lining processes, and fully composite processes [127,128]. Owing to the extremely low boiling point of hydrogen, the liquid hydrogen storage method is only suitable for large-scale storage and delivery and may not be suitable for application in a resilient environment.…”

Section: Storage-related Technologymentioning

confidence: 99%

Hydrogen‐powered smart grid resilience

Han

Wang

et al. 2023

Energy Conversion and Econom

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With an increasing frequency of natural disasters and security attacks, the safe and stable operation of smart grid has been challenged unprecedently. To reduce the economic loss and social impact caused by power outage accidents, it is urgent to develop and improve the smart grid technology, and strengthen the disaster resistance and recovery capability of smart grids when faced with extreme events. As an efficient and flexible secondary energy source, hydrogen is crucial in improving the resilience of smart grid and supporting energy security. To further promote the deep integration of hydrogen systems and smart grid and improve the energy system resilience, the resilience of smart grids supported by hydrogen is assessed in this study. First, a technical framework of hydrogen-powered smart grid resilience is established, and the value of hydrogen-powered smart grid resilience is analysed considering different time frames (before, during and after an extreme event) of smart grids facing extreme events. Then, hydrogen-powered smart grid resilience is investigated from perspectives of pre-prevention regulation, in-process correction regulation, and postrecovery regulation. Finally, future direction for hydrogen-powered smart grid resilience is investigated and related policy suggestions are provided.

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Section: Storage-related Technologymentioning

confidence: 99%

Hydrogen‐powered smart grid resilience

Han

Wang

et al. 2023

Energy Conversion and Econom

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“…3). The hydrogen electrochemical oxidation method was applied to estimate the total amount of hydrogen absorbed during the charging procedure [39][40][41]. The oxidation currents were obtained by keeping the specimens at a potential of þ168 mV Ag/AgCl in a deaerated 0.2 M NaOH solution for 2 h. This potential, which is higher than the hydrogen equilibrium potentials and lower than the passive film breakdown potential of the metal, allowed the oxidation reaction of the metal to be limited in this solution (see the uncharged reference curve, Fig.…”

Section: Hydrogen Chargingmentioning

confidence: 99%

Investigation of hydrogen assisted cracking in acicular ferrite using site-specific micro-fracture tests

Costin

Lavigne

Kotousov

et al. 2016

Materials Science and Engineering: A

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Hydrogen assisted cracking (HAC) is a common type of failure mechanism that can affect a wide range of metals and alloys. Experimental studies of HAC are cumbersome due to various intrinsic and extrinsic parameters and factors (associated with stress, hydrogen and the materials microstructure) contributing to the hydrogen crack kinetics. The microstructure of many materials consists of diverse constituents with characteristic features and mechanical properties which only occur in very small material volumes. The only way to differentiate the effect of these individual constituents on the hydrogen crack kinetics is to miniaturise the testing procedures. In this paper we present a new experimental approach to investigate hydrogen assisted crack growth in a microstructural constituent, i.e. acicular ferrite. For this purpose, sharply notched microcantilevers were fabricated with a Focus Ion Beam within this selected microscopic region. Acicular ferrite can be found in many ferrous alloys including ferritic weld metal and has specific features that control its intrinsic susceptibility to HAC. These features were characterised via Electron Backscatter Diffraction and the specimens were subsequently loaded under uncharged and hydrogen charged conditions with a nanoindenter. The outcomes of the testing, demonstrated that the threshold stress intensity factor, Kth, to initiate crack propagation in acicular ferrite ranges between 1.56 MPa m1/2 and 4.36 MPa m1/2. This range is significantly below the values of Kth reported for various ferrous alloys in standard macro-tests. This finding indicates that the mechanisms and resistance to HAC at micro-scale could be very different than at the macroscale as not all fracture toughening mechanisms may be activated at this scale level. Hydrogen assisted cracking (HAC) is a common type of failure mechanism that can affect a wide range of metals and alloys. Experimental studies of HAC are cumbersome due to various intrinsic and extrinsic parameters and factors (associated with stress, hydrogen and the materials microstructure) contributing to the hydrogen crack kinetics. The microstructure of many materials consists of diverse constituents with characteristic features and mechanical properties which only occur in very small material volumes. The only way to differentiate the effect of these individual constituents on the hydrogen crack kinetics is to miniaturise the testing procedures. In this paper we present a new experimental approach to investigate hydrogen assisted crack growth in a microstructural constituent, i.e. acicular ferrite. For this purpose, sharply notched micro-cantilevers were fabricated with a Focus Ion Beam within this selected microscopic region. Acicular ferrite can be found in many ferrous alloys including ferritic weld metal and has specific features that control its intrinsic susceptibility to HAC. These features were characterised via Electron Backscatter Diffraction and the specimens were subsequently loaded under uncharged and hydrogen charged con...

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