Hydrogen, a potential alternative energy source, is produced commercially by methane (or LPG) steam reforming, a process that requires high temperatures, which are produced by burning fossil fuels. However, as this process generates large amounts of C02, replacement of the combustion heat source with a nuclear heat source for 773 -1173 K processes has been proposed in order to eliminate these C02 emissions. In this paper, a novel method of nuclear hydrogen production by reforming dimethylether (DME) with steam at about 573 K is pro posed. From a thermodynamic equilibrium analysis of DME steam reforming, the authors identified conditions that provide high hydrogen production fraction at low pressure and tem peratures of about 523 - 573 K. By setting this low-temperature hydrogen production process upstream from a turbine and nuclear reactor at about 573 K, the total energy utilization efficiency according to equilibrium mass and heat balance analysis is about 50 %, and it is 75 % for a fast breeder reactor (FBR), where turbine is upstream of the reformer.
Conceptual design of low-temperature hydrogen production and high-efficiency nuclear reactor technology
Konzeptioneller Entwurf zur Niedrigtemperatur-Wasserstoffproduktion und hocheffiziente nukleare Reaktortechnologie
2004
4 Seiten, 5 Bilder, 3 Quellen
Aufsatz (Konferenz)
Englisch
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