Solar Rotary Reactor for Continuous H2 Production Using Two-(5)

arized in Table 1. The temperature of the reactive ceramics and other materials heated by infrared image lamps were calculated with an integration of the increases introduced by Eq.(3). 3/6WHEC 16 / 13-16 June 2006 – Lyon France4. Results and Discussion X-ray diffraction pattern of the synthetic material (Ni,Mn-ferrite) showed good agreement with data reported previously.4 The prepared Ni,Mn-ferrite was provided for the two-step water splitting reaction using the rotary-type solar furnace in addition to the purchased CeO2. The variations of temperatures 1673 for all materials of the cylindrical rotor are presented in Fig.4 as the reactive ceramics results of the theoretical calculation 1473 of heat transfer properties. The temperature of the reactive 1273 ceramics in the rotary-type solar furnace was estimated to be insulation 1073 attained up to 1573K by the infrared image lamp with output of 4x105 W 873 m-2. The cylindrical rotor coated with 673 the reactive ceramics (CeO2) was quartz wool revolved 180 degrees intermittently quartz glasses 473 and each fraction of reactive ceramics was alternately located in stainless steel the oxygen releasing reaction cell 0 100 200 300 400 500 600 and the hydrogen generation reaction cell. The profiles Time (s) determined by the direct gas mass Fig. 4 The variation of temperatures for all materials of spectrometer for the evolutions of the cylindrical rotor and the quartz glass. oxygen and hydrogen with the rotary-type solar furnace are shown in Fig.5. The value in x-axis of Fig.5 is represented H2 time-course after the attainment of estimated temperature of reactive ceramics at 1623K, and the evolution of hydrogen is indicated by a dotted circle. The peaks of hydrogen evolution were confirmed every 10 Rotation of min with the rotation of cylindrical rotor. On 180 degrees the other hand, no peak of oxygen evolution was observed in the two-step water splitting cycle. The surface of the cylindrical rotor O2 coated with the reactive ceramics was heated by the infrared image lamp and its maximum temperature was approximately 10 15 20 25 estimated at 1623K by means of an observation of the reactive ceramics Time (min) established on the cylindrical rotor. Since Fig. 5 H2 generation and O2 releasing profiles observed the appropriate temperature of the oxygen by mass spectrometry in the hydrogen generation releasing reaction with CeO2 is above reaction cell and oxygen releasing reaction cell, 1673K, the reaction rate for the oxygen respectively, with CeO2. releasing was not large enough to determine the content of evolved oxygen in the effluent gas from the oxygen releasing reaction cell at 1623K by the mass spectrometer. The reactive ceramics which exhibited the evolution of oxygen efficiently at the low temperature were provided to confirm the oxygen releasing reaction with the rotary-type solar furnace. The oxygen releasing reaction and the hydrogen generation reaction were carried out using the rotary-ty

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