Two-Step Thermochemical Cycles for High-Temperature Solar Hydrogen Production
Two-Step Thermochemical Cycles for High-Temperature Solar Hydrogen Production
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DOI：
10.4028/www.scientific.net/ast.72.119
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发表时间：
2010-10
期刊：
影响因子：
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通讯作者：
T. Kodama;N. Gokon
中科院分区：
文献类型：
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作者：
T. Kodama;N. Gokon
本文回顾了通过氧化还原铁基金属氧化物利用集中太阳能高温热作为能源生产氢气的两步水分解循环。集中的太阳辐射集中在有窗的太阳能反应堆上，在美国西南部、欧洲南部、澳大利亚北部等日照严重的“阳光带”地区，最高温度可超过1500℃。集中的太阳高温热量有可能通过热化学方法从水中产生氢气。通过氧化铁氧化还原对的两步热化学分解水是最有前途的循环之一。然而，该循环至少需要 1500 K 以上的热量。这对“窗口式”太阳能反应器概念提出了挑战，例如整体式装置反应器、泡沫装置反应器、反向旋转环装置反应器和内循环流化床反应器。在反应器中，反应动力学必定是一个重要的关键因素。因此，反应性氧化还原材料和装置的进一步发展将对这些反应器的改进产生非常大的影响。本文综述了为氧化还原铁基氧化物的两步热化学水分解循环开发的工作氧化还原材料、反应装置和反应器。
This paper reviews two-step water splitting cycles by redox iron-based metal oxides to produce hydrogen utilizing concentrated solar high-temperature heat as energy source. The concentrated solar radiation is focused upon a windowed solar reactor where maximum temperatures can exceed 1500 ̊C in the greatly insolated “sun-belt” regions such as the South-western United States, southern Europe, north Australia, etc. The concentrated solar high-temperature heat has the potential to produce hydrogen from water thermochemically. A two-step thermochemical water splitting by iron-oxide redox pair is one of the most promising cycle. However, the cycle requires heat above 1500 K minimum. This provides a challenge to “windowed” solar reactor concepts, such as a monolithic device reactor, a foam-device reactor, a Counter-Rotating-Ring device reactor, and an internally-circulating fluidized bed reactor. In the reactors, the kinetics of the reactions must be an important key factor. Thus, further development of reactive redox materials and devices will have a very large impact on the improvement of these reactors. This paper reviews the working redox materials, the reactive devices and the reactors developed for the two-step thermochemical water splitting cycle by a redox iron-based oxide.