| 摘要 |
Water is fed into a high temperature pressurized vessel containing hydrated large-port mordenite having a high Si/Al ratio and containing a cation that is selected from a specified group of metals and that is in its highest oxidation state. The high temperature causes an endothermic redox reaction that produces oxygen gas and, as a solid reaction product, a large-port mordenite wherein the metal cation is in a lower oxidation state. The solid reaction product is passed through a heat exchanger, where it is cooled and then into a second pressurized reaction vessel at low temperature whereby there occurs an exothermic redox reaction that produces hydrogen gas and which oxidizes the cation back to its highest oxidation state. The large-port mordenite generated in the second reaction vessel is passed through the heat exchanger, where it is heated, and then back into the first reaction vessel for recycling. Pressurization is employed in the reaction vessels to prevent dehydration and this, together with the composition of the mordenite and the use of the heat exchanger, provides high thermal efficiency.
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