In this report silicon is introduced as fuel for the release of hydrogen. Silicon represents an emission-free and cost-effective fuel in contrast to other hydrogen storage systems like methanol or liquid hydrogen for fuel cell vehicles. In this new process, hydrogen is produced from silicon metal and alkaline lye in a self consuming way. The innovation lies in the consumed alkaline lye being reprocessed in a secondary process precipitating quartz. If the exhaust from the fuel cell is passed through a condenser to recover water, then silicon is the only fuel required for the total drive. Hence, the specific energy density for silicon producing hydrogen is comparable to liquid hydrogen systems or methanol. Contrarily to toxic methanol, there are no CO2-emissions and thus a completely emission-free drive can be obtained. Moreover, silicon does not produce CO damaging polymer electrolyte membrane (PEM) fuel cells and it is suitable for long-term storage without safety issues.
Hydrogen from silicon source for polymer electrolyte fuel cells in mobile systems
Wasserstofferzeugung mit Hilfe von Silizium für PEM-Brennstoffzellen in mobilen Systemen
PEFC, European PEFC Forum, 1 ; 397-406
2001
10 Seiten, 4 Bilder, 2 Tabellen, 10 Quellen
Conference paper
English
Alkalilösung , Aufbereitung , Betriebssicherheit , Brennstoffzelle , Emissionsminderung , Energiedichte , Fahrzeugantriebsart , fester Brennstoff , hydriertes Silicium , Innovation , kontinuierliche Ausscheidung , Kostenreduzierung , Lauge , Quarz , Silicium , Speicherfähigkeit , Wasserstofferzeugung
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