Magnesium Hydride Slurry: A Better Answer to Hydrogen
                    Storage

McClaine, Andrew W.; Brown, Kenneth D.; Bowen, David D. G.

doi:10.1115/1.4030398

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…In addition, LH 2 or TOL-LOHC is associated with higher energy consumption for liquefaction or dehydrogenation compared to the compression of gaseous H 2 and LH 2 may also undergo boil off (Figure ). A similar trade-off in the capital cost of H 2 storage capacity and total capital cost of H 2 conversion and reconversion capacities can be seen for other alternative liquid-based H 2 storage technologies such as N-ethylcarbazole (NEC) or dibenzyltoluene (DBT)-based LOHC, ammonia, and magnesium hydride slurry (Figure S1). The only H 2 storage technology that is relatively low capital costs and energy consumption is UGH 2 (Figure S1).…”

Section: Introductionmentioning

confidence: 60%

“…Although we have focused on two particular types of liquid hydrogen storage technologies (LH 2 , LOHC), future work could include other similar H 2 storage technologies. For example, ammonia (cracked to produce H 2 ) and magnesium hydride slurry. It is also vital to understand how these low capital cost liquid H 2 storage technologies integrate with the potential use of geographically constrained underground H 2 storage resources.…”

Section: Discussionmentioning

confidence: 99%

Section: Impact Of Lohc or Lh 2 Availability On Deepmentioning

confidence: 99%

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Role of Liquid Hydrogen Carriers in Deeply Decarbonized Energy Systems

Narayanan

Gençer

et al. 2022

ACS Sustainable Chem. Eng.

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Hydrogen can be valuable for deep decarbonization of electricity systems as well as energy end-uses where direct electricity is challenged. While most hydrogen supply chain analyses focus on storing hydrogen as compressed gas hydrogen (CGH 2 ) storage, hydrogen storage systems with lower capital cost of storage capacity such as liquefied hydrogen (LH 2 ) and liquid organic hydrogen carriers (LOHC) may provide a differentiated value for energy system decarbonization. However, the latter systems have disadvantages (e.g., higher capital cost of charge/ discharge capacity, boil-off, high energy requirement for conversion/ reconversion) that could impede their deployment. In this study, we expand upon a previously developed electricity-hydrogen infrastructure planning model, DOLPHyN, to explore the value of liquid hydrogen solutions for energy storage and transport in a deeply decarbonized energy system. First, we show that TOL-LOHC (i.e., toluene-based LOHC) and LH 2 are beneficial as seasonal energy storage systems, while CGH 2 is more suitable for shorter-duration storage (e.g., weekly) cycling. The addition of LH 2 and LOHC enables more efficient utilization of deployed electric generation and power-to-hydrogen generation infrastructures. Second, we show that LH 2 is more favorable than LOHC for providing long-term storage for the power sector because its primary capital costs and energy penalty for conversion are incurred during charging periods, which typically correspond to when renewable energy is more abundant. Cost effectiveness of LH 2 is based on accounting for boil-off rates of largescale LH 2 systems. Third, we show that commercial viability of LOHC is strongly tied to the ability to lower the energetic consumption of the dehydrogenation process as well as its capital cost.

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Section: Introductionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 99%

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Role of Liquid Hydrogen Carriers in Deeply Decarbonized Energy Systems

Narayanan

Gençer

et al. 2022

ACS Sustainable Chem. Eng.

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“…Current options to store this H 2 include compression into vessels (above ground 250 bar US $450 kg −1 H 2 [32]), underground caverns (salt US $1.6-5 kg −1 H 2 or lined rock US $12-26 kg −1 H 2 [32]), or sorption of H 2 by a low temperature metal hydride (LTMH) (such as NaAlH 4 at US $1400 kg −1 H 2 based on 5.6 kg H 2 tank [33]). Another suggested method is to store H 2 within a magnesium hydride slurry system [34]. Each of these options have their advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Hydride-based thermal energy storage

Buckley

Busch²,

Bunzel

et al. 2022

Prog. Energy

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The potential and research surrounding metal hydride (MH) based thermal energy storage is discussed, focusing on next generation thermo-chemical energy storage (TCES) for concentrated solar power. The site availability model to represent the reaction mechanisms of both the forward and backward MH reaction is presented, where this model is extrapolated to a small pilot scale reactor, detailing how a TCES could function/operate in a real-world setting using a conventional shell & tube reactor approach. Further, the important parameter of effective thermal conductivity is explored using an innovative multi-scale model, to providing extensive and relevant experimental data useful for reactor and system design. Promising high temperature MH material configurations may be tuned by either destabilisation, such as using additions to Ca and Sr based hydrides, or by stabilisation, such as fluorine addition to NaH, MgH2, or NaMgH3. This versatile thermodynamic tuning is discussed, including the challenges in accurately measuring the material characteristics at elevated temperatures (500 –700 °C). Attention to scale up is explored, including generic design and prototype considerations, and an example of a novel pilot-scale pillow-plate reactor currently in development; where materials used are discussed, overall tank design scope and system integration.

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