Beiträge zur Auslegung und Bewertung von thermochemischen Kreisprozessen zur Erzeugung von Wasserstoff und Sauerstoff aus Wasser mittels HTR Wärme

摘要

The important role of hydrogen as an energy carrier for the future is depicted. A new hybrid process is introduced, which is based upon the steam-tin-reaction followed by electrolytical decomposition of tin-dioxide. The process flows of the sulfuricacid-hybrid-cycle, brominehydrogen-hybrid-cycle, sulfuricacid-iodine-cycle, copper-sulfatehybrid-cycle, methane-methanol-sulfuricacid-cycle, zinc-seleniumcycle and lithiumhydride-hybrid-cycle are articulated in unit operations to comparable units. A comparison of the different water splitting cycles with coal gasification is performed. The mass flows of the process fluids, the energy dependent mass flows, as well as the space times and the necessary inventory of the process fluid masses are compared. Possible material problems are shown and suggestions are made for their solutions. The economy of hydrogen as an energy carrier is shown.