Development of dehydrogenation catalyst for hydrogen generation in organic chemical hydride method

Okada, Yoshimi; Sasaki, Eiji; Watanabe, Eiji; Hyodo, Susumu; Nishijima, Hiroaki

doi:10.1016/j.ijhydene.2005.11.014

Cited by 288 publications

(160 citation statements)

References 13 publications

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“…First, the temperature for a sufficiently high equilibrium conversion of the hydrogenated compound to release hydrogen is rather high (Figure 11). [95] For essentially full conversion, over 300 8C are required, and for rehydrogenation, the aromatic hydrocarbon would need to be transported back to a central facility. Moreover, a separation unit may need to be installed to avoid slip contamination of the hydrocarbon if dehydrogenation is incomplete.…”

Section: Hydrogenation/dehydrogenation Of Liquid Hydrogen Carriersmentioning

confidence: 99%

“…Rather, these systems are intended as a storage medium to buffer seasonal changes in demand and supply of renewable energy [96] or as a transport medium for a hydrogen infrastructure that would be dehydrogenated at the hydrogen filling station for fuel-cell-powered cars. [95] On board a vehicle, another technology for hydrogen storage would be required.…”

Section: Hydrogenation/dehydrogenation Of Liquid Hydrogen Carriersmentioning

confidence: 99%

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Chemical and Physical Solutions for Hydrogen Storage

Eberle¹,

2009

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Hydrogen is a promising energy carrier in future energy systems. However, storage of hydrogen is a substantial challenge, especially for applications in vehicles with fuel cells that use proton-exchange membranes (PEMs). Different methods for hydrogen storage are discussed, including high-pressure and cryogenic-liquid storage, adsorptive storage on high-surface-area adsorbents, chemical storage in metal hydrides and complex hydrides, and storage in boranes. For the latter chemical solutions, reversible options and hydrolytic release of hydrogen with off-board regeneration are both possible. Reforming of liquid hydrogen-containing compounds is also a possible means of hydrogen generation. The advantages and disadvantages of the different systems are compared.

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Section: Hydrogenation/dehydrogenation Of Liquid Hydrogen Carriersmentioning

confidence: 99%

Section: Hydrogenation/dehydrogenation Of Liquid Hydrogen Carriersmentioning

confidence: 99%

Chemical and Physical Solutions for Hydrogen Storage

Eberle¹,

2009

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“…The equilibrium yields shown in the diagram agree with experimental results given in the literature (e.g., Refs. [33,34]). The yields given here are always slightly higher than the yields of the dehydrogenation experiments in the respective publications, because practical conversions can never fully reach the thermodynamic maximum.…”

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confidence: 99%

Thermodynamic Evaluation of Potential Organic Hydrogen Carriers

2013

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“…There is considerable interest in supplying energy for fuel cells using hydrogen derived from renewable sources, and a key approach is a method using chemical hydrides (Kim J and Kim T, 2015). The chemical hydride provides a transport cycle for hydrogen using methylcyclohexane (MCH, C 6 H 11 CH 3 ) and toluene (C 6 H 5 CH 3 ) (Okada, 2006). This has the potential to make a significant contribution to the realization of a low carbon society.…”

Section: Introductionmentioning

confidence: 99%

Energy efficiency of a hydrogen supply system using the reaction cycle of methylcyclohexane-toluene-hydrogen

Obara

2018

Mechanical Engineering Journal

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In this research, we investigated an energy supply system based on hydrogen derived from renewable energy. We modeled the energy flow and efficiency of a system using the MCH-toluene-hydrogen reaction cycle (MTHR) by methylcyclohexane (MCH, C 6 H 11 CH 3 ) and toluene (C 6 H 5 CH 3 ). Electric power storage by the MTHR and energy transport by a hydrogen infrastructure were investigated using numerical analysis. The energy flow of the whole system was investigated by cooperation of the numerical model of each component. The rate of input and output based on the calorific value of hydrogen defines the efficiency of each component and the system. When the electric power output of the renewable energy source was set to 100%, the maximum energy efficiency based on the calorific value of the hydrogen supplied from the hydrogenation facilities was 53.6%. Conversely, the electric power and thermal efficiency based on the rating of the dehydrogenation facilities were 29.9% and 6.8%, respectively. The maximum total power generation efficiency of the MCH-toluene-hydrogen reaction cycle was 16.0%; however, when thermal power was taken into account this rose to 16.7%. A case study was also conducted using a 1 MW wind farm combined with MTHR for Hokkaido in Japan.

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Development of dehydrogenation catalyst for hydrogen generation in organic chemical hydride method

Cited by 288 publications

References 13 publications

Chemical and Physical Solutions for Hydrogen Storage

Chemical and Physical Solutions for Hydrogen Storage

Thermodynamic Evaluation of Potential Organic Hydrogen Carriers

Energy efficiency of a hydrogen supply system using the reaction cycle of methylcyclohexane-toluene-hydrogen

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