If dissociation and separation are accomplished by the high temperature electrolysis of molten Cs2O, the efficiency was calculated to be 31.6. To that end we measured those elements in about 600 samples of well water, most of which were collected 10 years ago by the Swedish Geological. It is pyrophoric and reacts with water even at 116 C (177 F). Based on thermal dissociation of Cs2O and the diffusional separation of Cs g and O2 g, a practical efficiency of 45 was estimated. Caesium has physical and chemical properties similar to those of rubidium and potassium. It reacts more violently than the other alkali metals with water. It may set itself on fire (ignite) in air. The ideal hydrogen production thermal efficiency for the process is 66, where efficiency is defined as the higher heat of combustion of H2 68.3 kcalmole divided by the external thermal energy supplied to the process per gram-mole of H2 produced. Because of its high reactivity, it is a dangerous chemical. Experiments proved that cesium reacts with water to form CsOH quantitatively, and that reaction conditions cannot be adjusted so as to preferentially form Cs2O verified that O2 reacts with CsOH to form the higher cesium oxides CsO2 and Cs2O2 and release water and evidenced a substantial Cs2O decomposition rate at acceptable process temperatures. The process is a closed cycle in which water is the only consumable raw material. Abstract: A feasibility study of a process for producing hydrogen from the reaction of cesium with water was completed.
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