Study on Solar Hydrogen Production using Concentrated-Solar-Heat Reactive Ceramics

聚光热反应陶瓷太阳能制氢研究

• 批准号: 12308022
• 负责人: TAMAURA Yutaka
• 金额: $ 26.11万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12308022/
• 关键词: two-solid-phase ceramics; Zn; ferrite; ZnO; Mn-ferrite; solar reactor; solar hydrogen; heliostat; beam-down solar concentrating system; solar; chemical energy; 亜鉛フェライト; 化学エネルギー変換; ソーラー水素

1)A laboratory-scale solar reactor which could be practically applicable for industrial technology was fabricated and its performance for solar hydrogen production by two-step water splitting using the two-solid-phase ceramics with the Zn/ferrite system was evaluated. The two-step water splitting consists of 1) the O_2-releasing step of ZnFe_2O_4=Zn+2/3Fe_3O_4+2/3O_2 and 2) the H_2 production step of Zn+2/3Fe_3O_4+4/3H_2O=ZnFe_2O_4+4/3H_2. The temperature for the O_2-releasing step is around 1500℃, which is lower by about 200-300℃ than for the Zn/ZnO system.2)Based on the Zn/ferrite system, we have found out more feasible two-solid-phase ceramics with ZnO/Mn-ferrite system, which can be operated at temperatures around 1000℃ for the 0_2-releasing step. This temperature (1000℃) is the lowest for the 0_2-releasing step of the two-step water splitting using metal oxides. The solar reactor for this ZnO/Mn-ferrite system was designed to be operated by repetition of the two-steps for solar hy … More drogen production using the phase transition between mono phase and two phases. The paper on the experimental results concerning the ZnO/Mn-ferrite system was presented at the International Solar Energy Congress, which was held at Adelaide (Australia) in Nov.2001. At this congress, we had a meeting to discuss on the solar reactor with the international collaboration members of this study at the Australia University.3)The beam-down solar concentrating system, which had been fabricated at TIT (Tokyo Institute of Technology) in laboratory scale, was modified to improve the concentrating performance by expanding reflection mirror area by two-times, and the relationship between the focus image distribution and concentrating system was examined. To develop an original technology belonging to Japan for heliostat, the heliostat which had been made to be used for the beam-down solar concentrating system was redesigned, and the improvement points were extracted. With those improved beam-down solar concentrating system, ZnO/Mn-ferrite system was examined for the solar/chemical energy conversion efficiency. Less

1）一种实验室规模的太阳能反应器，实际上可以适用于工业技术，并通过使用Zn/铁氧体系统的两层固相陶瓷进行两步水分割而用于太阳能氢的性能。两步水分拆分由1）Znfe_2O_4 = Zn+2/3FE_3O_4+2/3O_2和2）Zn+2/3FE_3O_4+4/3H_2O = ZNFE_2O_2O_2O_4+4/3H__2的H_2生产步骤组成1）Znfe_2O_4 = ZnFe_2O_4 = ZN+2/3FE_3O_4+2/3FE_3O_4+2/3FE_3O_4+2/3FE_3O_4+2/3FE_3O_4+2/3FE_3O_4+2/3FE_3O_4+2/3FE_3O_4+2/3FE_3O_2和2）的O_2释放步骤组成1）。 O_2释放步骤的温度约为1500℃，大约比Zn/ZnO系统低约200-300。对于使用金属氧化物分割的两步水分的0_2释放步骤，该温度（1000℃）是最低的。该ZnO/Mn-有限岩系统的太阳反应堆设计为通过重复两步的太阳能hy……使用单相和两个阶段之间的相变。有关ZnO/MN-铁岩系统的实验结果的论文是在2001年11月在澳大利亚阿德莱德（Adelaide）举行的国际太阳能大会上发表的。在这次国会上，我们举行了一次会议，与澳大利亚大学的本研究的国际合作成员讨论太阳能反应堆。3）在实验室规模（Tokyo Technology Institute of Technology Institute of Thack）中进行了横梁向下的太阳能集中系统，已修改，以通过两倍的相关区域和集中精度分配和专注于图像分配和浓度分配的相关性来改善集中型性能，以提高集中力性能。为了开发属于日本的HelioStat的原始技术，重新设计了用于横梁向下的太阳能浓缩系统的Heliostat，并提取了改进点。通过改进的横梁向下浓缩系统，检查了ZnO/MN-铁岩系统的太阳能/化学能转化效率。较少的

项目成果

Y.Tamaura,N.Kojima,N.Hasegawa, et al.: "H_2 Generation by H_2O/Zn/Fe_3O_4 Reaction System."Proceeding of the 8th International Conference on Ferrites. (in press). (2001)

Y.Tamaura，N.Kojima，N.Hasekawa，等人：“H_2O/Zn/Fe_3O_4 反应系统生成 H_2”。第八届国际铁氧体会议论文集。

H.Kaneko, Y.Hosokawa, Y.Tamaura, et al.: "Studies on metal oxides suitable for enhancements of O_2-releasing step in the water splitting by MnFe_2O_4-Na_2CO_3 system"Energy. 26・10. 919-929 (2001)

H.Kaneko、Y.Hosokawa、Y.Tamaura 等：“适合增强 MnFe_2O_4-Na_2CO_3 体系水分解中 O_2 释放步骤的金属氧化物的研究”Energy 26・10。 ）

Y.Tamaura,N.Hasegawa,N.Kojima, et al.: "Solar H_2 Production by Two Step Water Splitting with Zn-Ferrite-Fe_3O_4 System."Proceeding of the 8th International Conference on Ferrites. (in press). (2001)

Y.Tamaura、N.Hasekawa、N.Kojima 等人：“利用 Zn-铁氧体-Fe_3O_4 系统两步水分解生产太阳能 H_2”。第八届国际铁氧体会议论文集。

Thennodynamic study based on the phase diagram of Na_2O-MnO-Fe_2O_3 system for H_2 production in three-step water splitting with Na_2CO_3/MnFe_20_4/Fe_20_3.

基于Na_2O-MnO-Fe_2O_3体系相图的Na_2CO_3/MnFe_20_4/Fe_20_3三步分解水制氢热动力学研究。

• 期刊: Solar Energy (in press)
• 作者: H.Kaneko;Y.Ochiai;Y.Tamaura et al.
• 通讯作者: Y.Tamaura et al.

N.Gokon, Y.Oku, H.Kaneko, Y.Tamaura: "Methane Reforming with CO_2 in Molten Salt using FeO Catalyst"Solar Energy. 72・3. 243-250 (2002)

N.Gokon、Y.Oku、H.Kaneko、Y.Tamaura：“使用 FeO 催化剂在熔盐中进行甲烷重整”72・3（2002 年）。