Solar Hydrogen Production by UT-3 Thermochemical Cycle

提出了一种与太阳能相结合的热化学制氢工艺UT-3。在800℃的温度下，太阳能集热器产生一定量的水蒸气，然后直接引入四个反应器进行绝热加热。这种使用绝热反应器的方法与传统的从反应器壁外加热的反应器相比，热效率有可能提高50%以上。从反应平衡的角度出发，发现要获得良好的反应转化率，需要有一定量的水蒸气旁通。除太阳能热能外，还研究了利用燃煤发电站和高炉排放的热能的可能性，其结果将在阿根廷举行的第11届世界氢能大会上发表。由E.Bligen和K.Yoshida撰写的一本关于氢能源的书也正在出版中。

A thermochemical hydrogen production process named UT-3 was proposed in combination with solar energy.Some amounts of water steam were produced from a solar collector at 800ﾟC,and then introduced directly into four reactors which were heated adiabatically. This method using adiabatic reactors showed a great possibility for improving thermal efficiency over 50% in comparison with conventional type of reactors heated from outside reactor walls.It was found that the bypass of a certain amount of water steam is needed to obtain good conversion of a reaction from consideration of its reaction equilibrium. In addition to solar heat, the possibility for utilizing discharged heat of coal-fired power stations and blast furnaces was studied, and the result will be presented at 11th World Hydrogen Energy Congress to be held in Argentine. The publication of a book about hydrogen energy written by E.Bligen and K.Yoshida is also in progress.