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Research and development on membrane IS process for hydrogen production using solar heat

Odtsetseg, M.; 岩月 仁; 田中 伸幸; 野口 弘喜; 上地 優; 井岡 郁夫; 久保 真治; 野村 幹弘*; 八巻 徹也*; 澤田 真一*; et al.

International Journal of Hydrogen Energy, 44(35), p.19141 - 19152, 2019/07

Thermochemical hydrogen production has attracted considerable interest as a clean energy solution to address the challenges of climate change and environmental sustainability. The thermochemical water-splitting iodine-sulfur (IS) process uses heat from nuclear or solar power and thus is a promising next-generation thermochemical hydrogen production method that is independent of fossil fuels and can provide energy security. This paper presents the current state of research and development of the IS process based on membrane techniques using solar energy at a medium temperature of 600$$^{circ}$$C. Membrane design strategies have the most potential for making the IS process using solar energy highly efficient and economical and are illustrated here in detail. Three aspects of membrane design proposed herein for the IS process have led to a considerable improvement of the total thermal efficiency of the process: membrane reactors, membranes, and reaction catalysts. Experimental studies in the applications of these membrane design techniques to the Bunsen reaction, sulfuric acid decomposition, and hydrogen iodide decomposition are discussed.


Liquid-like thermal conduction in intercalated layered crystalline solids

Li, B.; Wang, H.*; 川北 至信; Zhang, Q.*; Feygenson, M.*; Yu, H. L.*; Wu, D.*; 尾原 幸治*; 菊地 龍弥*; 柴田 薫; et al.

Nature Materials, 17(3), p.226 - 230, 2018/03

 被引用回数:18 パーセンタイル:1.81(Chemistry, Physical)

As a generic property, all substances transfer heat through microscopic collisions of constituent particles. A solid conducts heat through both transverse and longitudinal acoustic phonons, but a liquid employs only longitudinal vibrations. As a result, a solid is usually thermally more conductive than a liquid. In canonical viewpoints, such a difference also serves as the dynamic signature distinguishing a solid from a liquid. Here, we report liquid-like thermal conduction observed in the crystalline AgCrSe$$_{2}$$. The transverse acoustic phonons are completely suppressed by the ultrafast dynamic disorder while the longitudinal acoustic phonons are strongly scattered but survive, and are thus responsible for the intrinsically ultralow thermal conductivity. This scenario is applicable to a wide variety of layered compounds with heavy intercalants in the van der Waals gaps, manifesting a broad implication on suppressing thermal conduction. These microscopic insights might reshape the fundamental understanding on thermal transport properties of matter and open up a general opportunity to optimize performances of thermoelectrics.


Sorption of trivalent cerium by a mixture of microbial cells and manganese oxides; Effect of microbial cells on the oxidation of trivalent cerium

大貫 敏彦; Jiang, M.*; 坂本 文徳; 香西 直文; 山崎 信哉*; Yu, Q.; 田中 万也; 宇都宮 聡*; Xia, X.*; Yange, K.*; et al.

Geochimica et Cosmochimica Acta, 163, p.1 - 13, 2015/08

 被引用回数:5 パーセンタイル:61.37(Geochemistry & Geophysics)



Diluted ferromagnetic semiconductor Li(Zn,Mn)P with decoupled charge and spin doping

Deng, Z.*; Zhao, K.*; Gu, B.; Han, W.*; Zhu, J. L.*; Wang, X. C.*; Li, X.*; Liu, Q. Q.*; Yu, R. C.*; 後神 達郎*; et al.

Physical Review B, 88(8), p.081203_1 - 081203_5, 2013/08

 被引用回数:50 パーセンタイル:6.49(Materials Science, Multidisciplinary)

We report the discovery of a diluted magnetic semiconductor, Li(Zn,Mn)P, in which charge and spin are introduced independently via lithium off-stoichiometry and the isovalent substitution of Mn$$^{2+}$$ for Zn$$^{2+}$$, respectively. Isostructural to (Ga,Mn)As, Li(Zn,Mn)P was found to be a ${it p}$-type ferromagnetic semiconductor with excess lithium providing charge doping. First-principles calculations indicate that excess Li is favored to partially occupy the Zn site, leading to hole doping. Ferromagnetism with Curie temperature up to 34 K is achieved while the system still shows semiconducting transport behavior.


Li(Zn,Mn)As as a new generation ferromagnet based on a I-II-V semiconductor

Deng, Z.*; Jin, C. Q.*; Liu, Q. Q.*; Wang, X. C.*; Zhu, J. L.*; Feng, S. M.*; Chen, L. C.*; Yu, R. C.*; Arguello, C.*; 後神 達郎*; et al.

Nature Communications (Internet), 2, p.1425_1 - 1425_5, 2011/08

 被引用回数:98 パーセンタイル:6.28(Multidisciplinary Sciences)



Status and challenges in beam crystallization

Wei, J.*; Yu, P.*; 岡本 宏巳*; 百合 庸介; Li, X.-P.*; Sessler, A. M.*

Proceedings of Workshop on Beam Cooling and Related Topics (COOL '09) (Internet), p.86 - 90, 2010/00

During the past several decades, beam crystallization has been studied both theoretically and experimentally. Theoretical investigations have been numerical, mainly using computer modeling based on the method of molecular dynamics, and analytical, based on phonon theory. Experimental investigations involve both ion storage rings and ion traps using both electron and laser beam cooling. Topics of interests include crystal stability in various accelerator lattices and under different beam conditions, crystalline beam formation in shear-free ring lattices with both magnets and electrodes, experimental simulation of alternating-gradient conditions with an ion trap, etc. In this paper, we first review theoretical approaches and major conclusions pertaining to beam crystallization. Then, we analyze conditions and methods of the various major experiments. Finally, we discuss, both theoretically and experimentally, some improvements, open questions, and challenges in beam crystallization.


Guiding and confining fast electrons by transient electric and magnetic fields with a plasma inverse cone

Lei, A. L.*; Cao, L. H.*; Yang, X. Q.*; 田中 和夫*; 兒玉 了祐*; He, X. T.*; 三間 圀興*; 中村 龍史; 乗松 孝好*; Yu, W.*; et al.

Physics of Plasmas, 16(2), p.020702_1 - 020702_4, 2009/02

 被引用回数:11 パーセンタイル:50.86(Physics, Fluids & Plasmas)



ITER vacuum vessel, in-vessel components and plasma facing materials

伊尾木 公裕*; Barabash, V.*; Cordier, J.*; 榎枝 幹男; Federici, G.*; Kim, B. C.*; Mazul, I.*; Merola, M.*; 森本 将明*; 中平 昌隆*; et al.

Fusion Engineering and Design, 83(7-9), p.787 - 794, 2008/12

 被引用回数:16 パーセンタイル:20.67(Nuclear Science & Technology)


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