Development of Reactive Ceramics for Conversion of Concentrated Solar Heat Into Solar Hydrogen With Two-Step Water-Splitting Reaction

被引：12
作者：
Kaneko, H. [1 ]
Taku, S. [1 ]
Naganuma, Y. [1 ]
Ishihara, T. [1 ]
Hasegawa, N. [1 ]
Tamaura, Y. [1 ]
机构：
[1] Tokyo Inst Technol Tokyo Tech, Res Ctr Carbon Recycling & Energy, Meguro Ku, Tokyo 1528552, Japan
来源：
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2010年 / 132卷 / 02期
关键词：
reactive ceramics; concentrated solar heat; hydrogen production; two-step water-splitting process; ceria; H-2; GENERATION; SOLID-SOLUTION; FERRITE; SYSTEM; OXYGEN; CU;
D O I：
10.1115/1.4001180
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The reactive ceramics suitable for the rotary-type solar reactor (proposed by Tokyo Institute of Technology, Tokyo) with two-step water-splitting reaction were developed. It is confirmed that O(2) gas is evolved in the two-step water-splitting reaction with the reactive ceramics vigorously by rapid heating (alpha-O(2)-releasing reaction). The alpha-O(2)-releasing reaction is due to the formation of interstitial defect and the conversion of lattice oxygen into O(2) gas at a nonequilibrium state. Reactive ceramics (NiFe(2)O(4) and yttria stabilized zirconia (YSZ)-NiFe(2)O(4) solid solution) can absorb solar thermal energy and convert thermal energy into chemical energy under high O(2) partial pressure atmosphere in the alpha-O(2)-releasing reaction. Repetitive evolutions of O(2) gas were observed in the two-step water-splitting reaction with YSZ-Fe(3)O(4) solid solution and cerium based metal oxides (CeO(2)-NiO, CeO(2)-ZrO(2), and CeO(2)-Ta(2)O(5)) at high O(2) partial pressure. The CeO(2)-Ta(2)O(5) (Ce: Ta = 90: 10) released a large amount of O(2) gas (3.95 cm(3)/g) in the alpha-O(2) releasing reaction in the flow of air. [DOI: 10.1115/1.4001180]
引用
收藏
页码：0212021 / 0212024
页数：4
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