A system of hydrogen-powered vehicles with liquid organic hydrides

Taube, Michelle; Rippin, D.W.T.; Cresswell, David L.; Knecht, Walter

doi:10.1016/0360-3199(83)90067-8

Cited by 110 publications

(59 citation statements)

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“…MCH was first proposed as a hydrogen storage system for use as a vehicle fuel in 1980 [80] under what is now known as the methylcyclohexane-toluene-hydrogen (MTH) system [81,82]. After hydrogenation of TOL at the hydrogen supply site, MCH is transported by tanker and dehydrogenated at the demand site to yield H2 and the original TOL, which is then returned to the supply site and reused [83].…”

Section: Methylcyclohexane (Mch)mentioning

confidence: 99%

Assessing Uncertainties of Well-To-Tank Greenhouse Gas Emissions from Hydrogen Supply Chains

Ozawa

Inoue²,

Kitagawa

et al. 2017

Sustainability

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Abstract:Hydrogen is a promising energy carrier in the clean energy systems currently being developed. However, its effectiveness in mitigating greenhouse gas (GHG) emissions requires conducting a lifecycle analysis of the process by which hydrogen is produced and supplied. This study focuses on the hydrogen for the transport sector, in particular renewable hydrogen that is produced from wind-or solar PV-powered electrolysis. A life cycle inventory analysis is conducted to evaluate the Well-to-Tank (WtT) GHG emissions from various renewable hydrogen supply chains. The stages of the supply chains include hydrogen being produced overseas, converted into a transportable hydrogen carrier (liquid hydrogen or methylcyclohexane), imported to Japan by sea, distributed to hydrogen filling stations, restored from the hydrogen carrier to hydrogen and filled into fuel cell vehicles. For comparison, an analysis is also carried out with hydrogen produced by steam reforming of natural gas. Foreground data related to the hydrogen supply chains are collected by literature surveys and the Japanese life cycle inventory database is used as the background data. The analysis results indicate that some of renewable hydrogen supply chains using liquid hydrogen exhibited significantly lower WtT GHG emissions than those of a supply chain of hydrogen produced by reforming of natural gas. A significant piece of the work is to consider the impacts of variations in the energy and material inputs by performing a probabilistic uncertainty analysis. This suggests that the production of renewable hydrogen, its liquefaction, the dehydrogenation of methylcyclohexane and the compression of hydrogen at the filling station are the GHG-intensive stages in the target supply chains.

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Section: Methylcyclohexane (Mch)mentioning

confidence: 99%

Assessing Uncertainties of Well-To-Tank Greenhouse Gas Emissions from Hydrogen Supply Chains

Ozawa

Inoue²,

Kitagawa

et al. 2017

Sustainability

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“…The dehydrogenation of cycloalkanes such as cyclohexane, decalin and methylecyclohexane provides a good possibility for effective hydrogen storage and supply [1][2][3][4][5][6]. The advantages of the cycloalkanes include the supply of hydrogen without CO or CO 2 , the aromatic products are recyclable in subsequent hydrogenation and the cycloalkanes have relatively high hydrogen contents (6-8 wt%) and are more convenient for storage and transportation due to high boiling points (80-190°C).…”

Section: Introductionmentioning

confidence: 99%

Dehydrogenation of Cyclohexane Over Ni Based Catalysts Supported on Activated Carbon using Spray-pulsed Reactor and Enhancement in Activity by Addition of a Small Amount of Pt

2005

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Dehydrogenation of cyclohexane to benzene has been carried out over Ni supported on activated carbon cloth ACC (Ni/ACC) catalysts under spray-pulsed mode reactor to study hydrogen evolution for hydrogen storage and supply system applications. The maximum rate of hydrogen evolution using monometallic Ni/ACC catalysts was 8.5 mmol g )1 cat min )1 for Ni loading of 20% by weight. A small amount of Pt (0.5 wt%) was added to the Ni based catalysts. A synergistic effect was observed in the case of the promoted catalysts the hydrogen production was enhanced by ca. 1.5 times as compared to the 20 wt% Ni only catalyst. As compared to 0.5 wt% monometallic Pt catalyst, the 20 wt% Ni-0.5 wt% Pt bimetallic catalyst exhibits ca. 60 times higher hydrogen production rates. Selectivity towards dehydrogenation observed to be enhanced by addition of Pt into Ni/ACC catalysts.

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“…One of the first systems suggest for this task was toluene/methylcyclohexane. [13,14] In 2005 Pez et al proposed N-ethylcarbazole as a carrier material to ease the dehydrogenation, [15,16] and different groups have continued to research this carrier material. [17][18][19][20] Alternative carrier materials, such as azaborines, are being investigated by other groups.…”

mentioning

confidence: 99%