Research for carbon recycling by waste heat with Ferrites

铁氧体废热回收碳的研究

• 批准号: 06403030
• 负责人: TAMAURA Yutaka
• 金额: $ 14.21万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06403030/
• 关键词: CIO-layr; Ni(II)-ferrite; heat; chemical energy conversion; solar energy; O_2 release; ZnO; FeO; Ultra-fine particles; 酸素欠陥ニッケルフェライト; メタン化反応; ケミカルヒートポンプ; 水素エネルギー; 金属酸化物

The chemical analysis, X-ray diffractometry, FT/IR,Mossbauer effect, XPS measurement showed that the metal ions (Fe^<2+>, Ni^<2+>) in the CIO-layr (Carbon bearing iron oxide-layr) on the Ni(II)-ferrite form a kind of carbide-like linkage in the activation step. The CIO-layr is formed as a part of the spinel structure of the bulk Ni(II)-ferrite with a stoichiometric chemical composition. Fe^<2+> ion in the CIO-layr exists in the distorted spinel structure which contains a higher Content of Fe^<2+> ion than the normal spinel structure. The carbon element of the graphite in the CIO-layr can make a bonding with the Fe^<2+> ion in the CIO-layr under a lower partial pressure of O_2 at 300ﾟC.This would cause the formation of the carbide-like linkage and make it easy for O^2-ion to be released from CIO-layr. This Fe^<2+>-rich structure in the distorted spinel structure can be regarded as a distorted FeO structure, which would cause the O_2 gas evolution in the decomposition of the FeO structur … More e into the spinel phase and metallic phase. This was experimentally confirmed by the O_2 evolution reaction of the FeO/ZnO by-phase system under a lower oxygen partial pressure at 500ﾟC.Based on these O_2 evolution mechanism, a chemical structure with a higher reactivity of the O_2 release was designed. This offered a new route for developing the materials with a higher efficiency in the heat/chemical energy conversion system. Ultra-fine particles of the CIO-layred Ni(II)-ferrite was found to give an another way for increasing the O_2 evolution efficiency by 3 times. The results on the heat/chemical energy conversion experiment using a device specially designed and made, gave a poor efficiency for the CBNF.Therefore, a new system (combined cycle of 1st- and 2nd- Redox Systems), by which the heat/chemical energy conversion efficiency can be amplified, was designed and proved to be practically worked. This system was further studied to apply to the solar energy conversion into chemical energy at a lower temperature of 400-800ﾟC.The 2nd-Redox System was found to be used for solar energy/hydrogen energy conversion at the low temperatures. Less

化学分析、X射线衍射、FT/IR、穆斯堡尔效应、XPS等测试表明，在活化过程中，Ni（Ⅱ）-铁氧体表面的含碳氧化铁层中的金属离子（Fe^（2+）、Ni^（2+））形成了类碳化物键。C10层形成为具有化学计量化学组成的块状Ni（II）-铁氧体的尖晶石结构的一部分。CIO层中的Fe^<2+>离子以畸变的尖晶石结构存在，其Fe^<2+>含量高于正常的尖晶石结构。在300 ℃较低的氧分压下，CIO层中石墨的碳元素能与CIO层中的Fe^2+离子成键，形成类碳化物键，使CIO层中的O ^2-离子易于释放。这种畸变尖晶石结构中的富Fe^<2+>结构可以看作是畸变的FeO结构，这将导致FeO结构分解时放出O_2气体 ...更多信息 e进入尖晶石相和金属相。这一点通过500 ° C下较低氧分压下FeO/ZnO复相体系的析氧反应得到了实验证实。基于这些析氧机制，设计了具有更高氧释放反应性的化学结构。这为开发热/化学能转换系统中的高效材料提供了一条新的途径。超细粉体的加入为提高析氧效率提供了一条新途径，可使析氧效率提高3倍。针对自行设计的装置进行的热/化学能转换实验结果表明，CBNF的热/化学能转换效率不高的问题，设计了一种提高热/化学能转换效率的新系统（一级氧化还原系统和二级氧化还原系统的联合循环）。进一步研究了该系统在400-800 ℃的低温下将太阳能转化为化学能。发现第二氧化还原系统可用于低温下的太阳能/氢能转化。少

项目成果

T.Yoshida, H.Kato, M.Tsuji and Y.Tamaura: "Effect of platinum impregnationonto magnetite or Ni (II) -bearing toward the methanation of CO2" Proc.of Int.Sym.on Environmental Issues, on Ceramics 19-20,1994. 139-144 (1995)

T.Yoshida、H.Kato、M.Tsuji 和 Y.Tamaura：“Effect of Platinum impregnationonto Magnetite or Ni (II)-bearing对CO2甲烷化的影响”Proc.of Int.Sym.on环境问题，陶瓷19-

M.Tabata,H.Kato,M.Tsuji and Y.Tamaura: "Decomposition of CO2 to carbon using oxygen-deficient Zn (II)-bearing ferrite," Mater.Res.Soc.Proc.,. 344. 157-162 (1994)

M.Tabata、H.Kato、M.Tsuji 和 Y.Tamaura：“使用缺氧的含 Zn (II) 的铁氧体将 CO2 分解为碳”，Mater.Res.Soc.Proc.,。

M.Tsuji T.Togawa,Y.wada,T.Sano,and Y.Tamaura: "Kinetic study for the formation of cation-excess magnetite," J.Chem.Soc,Faraday Trans.,. 91[10]. 1533-1538 (1995)

M.Tsuji T.Tokawa、Y.wada、T.Sano 和 Y.Tamaura：“阳离子过量磁铁矿形成的动力学研究”，J.Chem.Soc，Faraday Trans.，。

T.Sano,N.Hasegawa,M.Tsuji and Y.Tamaura: "A carbon-bearing Ni (II) ferrite : a tailor-made solid reactant for two-step thermochemical water splitting at 300℃" Journal of Materials chemistry. (in press).

T.Sano、N.Hasekawa、M.Tsuji 和 Y.Tamaura：“含碳 Ni (II) 铁氧体：用于 300℃ 两步热化学水分解的定制固体反应物”《材料化学杂志》。按）。

Y.Tamaura,M.Tsuji,A.Steinfeld and P.Kuhn: "Coal/magnetite System for Mixing the Solar Energy into Fossil Energy" Energy. (in press).

Y.Tamaura、M.Tsuji、A.Steinfeld 和 P.Kuhn：“将太阳能混合到化石能源中的煤/磁铁矿系统”能源。