Liquid hydrogen, methylcyclohexane, and ammonia as potential hydrogen storage: Comparison review

Wijayanta, Agung Tri; Oda, Takuya; Purnomo, Chandra Wahyu; Kashiwagi, Takao; Aziz, Muhammad

doi:10.1016/j.ijhydene.2019.04.112

Cited by 377 publications

(161 citation statements)

References 79 publications

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“…The efficient storage of hydrogen is the key technical problem that needs to be overcome. Various approaches, such as high‐pressure hydrogen gas cylinder, liquid hydrogen tank, cryo‐physisorption of hydrogen in large surface area materials, and chemisorption of hydrogen over hydrides, have been explored for onboard hydrogen storage over the years. Storing H 2 in its elemental form is straightforward and has fast charge/discharge rates, however, suffers from low volumetric energy density and excessive energy losses during H 2 compression, liquefaction, and boil‐off .…”

Section: Hydrogen Storagementioning

confidence: 99%

Complex Hydrides for Energy Storage, Conversion, and Utilization

2019

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functionalities and exhibit great potentials for the applications in the energy transfer chain (Figure 1).In chemistry, a hydride is a compound having negatively charged hydrogen anion. [2] Nowadays, however, hydrogenous compounds having hydrogen bonded to metals or nonmetal in ionic, metallic or covalent manner are collectively referred as hydrides. [3] Complex hydride is such a class of compound having a general formula of M(XH n ) m , where M is usually a metal cation and X is a metal or nonmetal element which sets up covalent or ionocovalent bonding with H. [4] The M[XH n ] m is H-rich and can decompose selectively to H 2 allowing complex hydrides of light-weight elements potential hydrogen storage media. As a matter of fact, since the pioneering work of Ti-catalyzed NaAlH 4 in 1997, [5] extensive investigations on hydrogen storage over alanates, [6] amide-hydride composites, [7] borohydrides, [8] amidoboranes [9] as well as metallorganic hydrides [10] were carried out and tremendous progress has been made (Figure 2). [1,4a] The break and setup of XH bonding would be endergonic and exergonic, respectively. The energy input and output in hydrogen desorption and reabsorption over a complex hydride depends strongly on its thermodynamic stability, which also offers an opportunity of using complex hydrides as thermal energy storage materials to cope up with the intermittent, fluctuating and unstable supply of renewable energies. Owning to their exclusive advantages of diversity, high energy densities and tunability, complex hydrides have been actively pursued for this application since year 2000. [11] Solid electrolytes with fast conduction of Li, Na, or Mg ions are highly demanded for all-solid-state batteries with high energy density and safety. Coincidentally, complex hydrides are composed of those cations and a relatively large sized [XH n ] anion. The coordination flexibility of the large anion with alkali or alkaline earth cation would create some favorable structural features, such as defects and/or low-barrier diffusion channels, to facilitate cation migration within the lattice of complex hydrides. [12] Starting from the finding of high Li-ion conduction in the high-temperature-phase LiBH 4 , [13] a variety of complex hydrides has been developed, some of which show superior ion conductivity to their nonhydride peers. [14] Hydrogen storage over complex hydride would undergo dihydrogen dissociation into surface H atoms followed by H Functional materials are the key enabling factor in the development of clean energy technologies. Materials of particular interest, which are reviewed herein, are a class of hydrogenous compound having the general formula of M(XH n ) m , where M is usually a metal cation and X can be Al, B, C, N, O, transition metal (TM), or a mixture of them, which sets up an iono-covalent or covalent bonding with H. M(XH n ) m is generally termed as a complex hydride by the hydrogen storage community. The rich chemistry between H and B/C/N/O/Al/TM allows complex hydrides of diverse compo...

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Section: Hydrogen Storagementioning

confidence: 99%

Complex Hydrides for Energy Storage, Conversion, and Utilization

2019

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“…Among the various H 2 storage techniques, three potential candidates, i.e., LOHC (MCH-toluene system), NH 3, and Liquid H 2 have been compared. The comparison has been presented in Table 3 [7]. The gravimetric density of liquid H 2 is highest, followed by NH 3 and LOHC.…”

Section: Fuelmentioning

confidence: 99%

“…The regeneration temperatures required for the NH 3 system are in the range of 400-500 • C, compared with 100-200 • C for the LOHC system. Therefore, LOHC has been termed as an efficient technique, as it is comparatively the most established and efficient technique [7].…”

Section: Fuelmentioning

confidence: 99%

“…Various systems exist under the umbrella of LOHC, the comparisons of which have been presented in Table 4 [7][8][9]. The comparison shows that despite the lower gravimetric and volumetric densities of the MCH-toluene system, this system has better applicability due to the following reasons, among others:…”

Section: Fuelmentioning

confidence: 99%

“…Table 4. Comparison of various liquid organic hydrogen carriers (LOHCs) for hydrogen storage [7][8][9]. An overall LOHC system comprises reversible cycle hydrogenation and dehydrogenation for storage and release of hydrogen respectively.…”

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Simulation Study to Investigate the Effects of Operational Conditions on Methylcyclohexane Dehydrogenation for Hydrogen Production

et al. 2020

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In the recent era, hydrogen has gained immense consideration as a clean-energy carrier. Its storage is, however, still the main hurdle in the implementation of a hydrogen-based clean economy. Liquid organic hydrogen carriers (LOHCs) are a potential option for hydrogen storage in ambient conditions, and can contribute to the clean-fuel concept in the future. In the present work, a parametric and simulation study was carried out for the storage and release of hydrogen for the methylcyclohexane toluene system. In particular, the methylcyclohexane dehydrogenation reaction is investigated over six potential catalysts for the temperature range of 300–450 °C and a pressure range of 1–3 bar to select the best catalyst under optimum operating conditions. Moreover, the effects of hydrogen addition in the feed mixture, and byproduct yield, are also studied as functions of operating conditions. The best catalyst selected for the process is 1 wt. % Pt/γ-Al2O3. The optimum operating conditions selected for the dehydrogenation process are 360 °C and 1.8 bar. Hydrogen addition in the feed reduces the percentage of methylcyclohexane conversion but is required to enhance the catalyst’s stability. Aspen HYSYS v. 9.0 (AspenTech, Lahore, Pakistan) has been used to carry out the simulation study.

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Storage of Hydrogen in Reversible Aromatic Organic Liquids

Modisha

Bessarabov

2023

Industrial Arene Chemistry

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Liquid hydrogen, methylcyclohexane, and ammonia as potential hydrogen storage: Comparison review

Cited by 377 publications

References 79 publications

Complex Hydrides for Energy Storage, Conversion, and Utilization

Complex Hydrides for Energy Storage, Conversion, and Utilization

Simulation Study to Investigate the Effects of Operational Conditions on Methylcyclohexane Dehydrogenation for Hydrogen Production

Storage of Hydrogen in Reversible Aromatic Organic Liquids

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