Commodity hydrogen from off-peak electricity

Darrow, K.; Biederman, N.; Konopka, A.

doi:10.1016/0360-3199(77)90008-8

Cited by 7 publications

(3 citation statements)

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“…It should be noted that there are tremendous scale effects that should be considered when comparing the cost of hydrogen by different processes. Figure 10 taken from (Darrow et al, 1977) illustrates these scale effects. It is seen that production of hydrogen by steam-reforming becomes prohibitively expensive for small plants whereas electrolysis processes do not suffer such adverse scale effects for small plants.…”

Section: Economic Considerationsmentioning

confidence: 97%

“…The greatest effect (a 27 % reduction in hydrogen cost) is evident for application with SPE technology at "normal" power costs of $0.027/kWh; the corresponding cost reduction for conventional electrolysis is 18%. For off-peak power at Comparison of hydrogen prices for various rates of demand (from Darrow et al, 1977). Reprinted with permission from Int.…”

Section: Economic Considerationsmentioning

confidence: 99%

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Electrochemical Gasification of Coal-Simultaneous Production of Hydrogen and Carbon Dioxide by a Single Reaction Involving Coal, Water, and Electrons

Coughlin¹,

Farooque²

1980

Ind. Eng. Chem. Proc. Des. Dev.

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Coals and other forms of solid carbonaceous fossil fuel are oxidized to oxides of carbon at the anode of an electrochemical cell and hydrogen is produced at the cathode. These gases are thereby produced in relatively pure states. The reaction proceeds at very mild temperatures and at operating electrical potentials lower than 1 V, i.e., significantly lower than the thermodynamic potential of water electrolysis. The process may be viewed as driven simultaneously by energy supplied at low temperatures in approximately equal proportions by the coal and by an external electrical source. It Is expected that coal can supply a larger proportion of the energy if the process is operated at higher temperature for which the required electrical potential will be lower.

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Section: Economic Considerationsmentioning

confidence: 97%

Section: Economic Considerationsmentioning

confidence: 99%

Electrochemical Gasification of Coal-Simultaneous Production of Hydrogen and Carbon Dioxide by a Single Reaction Involving Coal, Water, and Electrons

Coughlin¹,

Farooque²

1980

Ind. Eng. Chem. Proc. Des. Dev.

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“…The 'pure' thermochemical process is one which requires heat as energy input, whereas if an electrochemical step is included in the reaction it becomes a 'hybrid' process. The heat source to drive the reaction could be high-temperature, gas-cooled, nuclear reactor (HTGR) or a solar furnace [24][25][26].…”

Section: Hydrogen Production From Thermochemical Processesmentioning

confidence: 99%

Carbon promoted water electrolysis to produce hydrogen at room temperature

Ranganathan¹

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The objective of the work was to conduct water electrolysis at room temperature with reduced energy costs for hydrogen production. The electrochemical gasification of carbons consumes only 9.6 kcal/mol H 2 O compared to 56.7 kcal/molH 2 O for conventional water electrolysis. In this work, carbon-assisted hydrogen production and the reaction energetics/kinetics at applied potentials |E 0 | between 0.1 and 1.8 V are studied. The carbon promoted water electrolysis could be performed at applied potentials as low as |E 0 |=0.21 V as opposed to conventional water electrolysis which requires |E 0 |>1.25 V. The study reveals that the H 2 produced per W h is higher at the lower voltages, but longer times are required to produce the same amount of H 2 .The following parameters were considered for evaluating the process: time taken, potential applied, current required and amount of carbon to be added. Based on such an evaluation, practical parameters of |E 0 | ~ 0.5 V and carbon concentration (0.08 g/cm 3) are suggested.

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Hydrogen energy bibliography

Cox

Natarajan

1977

International Journal of Hydrogen Energy

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Commodity hydrogen from off-peak electricity

Cited by 7 publications

References 0 publications

Electrochemical Gasification of Coal-Simultaneous Production of Hydrogen and Carbon Dioxide by a Single Reaction Involving Coal, Water, and Electrons

Electrochemical Gasification of Coal-Simultaneous Production of Hydrogen and Carbon Dioxide by a Single Reaction Involving Coal, Water, and Electrons

Carbon promoted water electrolysis to produce hydrogen at room temperature

Hydrogen energy bibliography

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