Physical Chemistry

New PDF release: A Photo-Ionization Experiment with Hydrogen

By Mohler F.L.

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Additional info for A Photo-Ionization Experiment with Hydrogen

Example text

Marnellos, C. S. S. Kikkinides hydrogen, rapid refuelling capability, excellent dormancy characteristics, and low infrastructure impact. 6. Hydrogen gas density as a function of pressure at T=298 K Despite these advantages, on-board high-pressure hydrogen storage must overcome several technical challenges in order to be viable in the long term. The energy density of hydrogen is significantly less than that of competing fuels. Even with the high efficiencies projected for fuel-cell vehicles, up to three times the current fuel efficiencies for internal combustion engines, a large volume of gaseous hydrogen storage will be required for acceptable vehicle range.

However, they require the use of expensive materials or composites to achieve a set of different targets including, minimal hydrogen leakage using gas diffusion barriers (polymer liner), maximum mechanical strength (carbon composite) and high impact resistance (foams). The combination of an assortment of different materials increases the cost of the storage tank significantly. E. Marnellos, C. S. S. Kikkinides hydrogen, rapid refuelling capability, excellent dormancy characteristics, and low infrastructure impact.

E. Marnellos, C. S. S. Kikkinides For these processes, efficiencies above 50% can be expected and could possibly lead to a major decrease of hydrogen production costs. The main technical issues for these high-temperature processes relate to materials development for corrosion resistance at high temperatures, high-temperature membrane and separation processes, heat exchangers, and heat-storage media. Design aspects and safety are also important for high-temperature processes. Thermo-chemical water splitting is the conversion of water into hydrogen and oxygen by a series of thermally driven chemical reactions.

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A Photo-Ionization Experiment with Hydrogen by Mohler F.L.


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