JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-20 displayed on this page of 90

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Nanoconfinement-driven energy-efficient CO$$_{2}$$ capture and release at high pressures on a unique large-pore mesoporous carbon

Szab$'o$, L.*; Inoue, Mizuki*; Sekine, Yurina; Motokawa, Ryuhei; Matsumoto, Yusuke*; Nge, T. T.*; Ismail, E.*; Ichinose, Izumi*; Yamada, Tatsuhiko*

ChemSusChem, p.e202402034_1 - e202402034_13, 2025/00

https://doi.org/10.1002/cssc.202402034
 Times Cited Count：0 Percentile：0.00(Chemistry, Multidisciplinary)

Here, we developed a large-pore mesoporous carbon with pore sizes centered around 20-30 nm using a templated technical lignin. During the soft-templating process, unique cylindrical supramolecular assemblies form from the copolymer template, distinct from other systems reported thus far. This peculiar nanostructuring takes place due to the presence of polyethylene glycol (PEG) segments on both the Pluronic template and the PEG- grafted lignin derivative (glycol lignin). A large increase in CO$$_{2}$$ uptake occurs on the resulting large-pore mesoporous carbon at 270 K close to the saturation pressure, owing to capillary condensation.

Journal Articles

Mn L$$_{2,3}$$-edge EXAFS and magnetic EXAFS studies on the halfmetallic ferromagnet Co$$_{2}$$MnSi

Kogo, Junya*; Fujiwara, Hidenori*; Sekiyama, Akira*; Saito, Yuji; Umetsu, Rie*; Niki, Kaori*

Journal of the Physical Society of Japan, 91(3), p.034702_1 - 034702_12, 2022/03

https://doi.org/10.7566/JPSJ.91.034702
 Times Cited Count：0 Percentile：0.00(Physics, Multidisciplinary)

JAEA Reports

Study of HTGR contribution to Japan's CO$$_{2}$$ emission reduction goal in 2050

Kamiji, Yu; Suzuki, Koichi*; Yan, X.

JAEA-Technology 2016-010, 24 Pages, 2016/07

JAEA-Technology-2016-010.pdf:1.05MB

Japanese government has set the goal of reducing CO$$_{2}$$ emission by 26% in 2030 below the 2013 level, in longer term, by 80% below the 1990 level. To achieve the goals, various measures should be taken. The GTHTR300, a commercial High Temperature Gas-cooled Reactor (HTGR) design being developed by JAEA offers spectrum of heat applications by using its high temperature heat up to 950$$^{circ}$$C. The potential contribution of CO$$_{2}$$ emission reduction by HTGR is estimated considering domestic and overseas deployment of the GTHTR300. The best estimate for domestic CO$$_{2}$$ reduction is 2.07$$times$$10$$^{8}$$ ton- CO$$_{2}$$/yr and that from oversea is 2.25$$times$$10$$^{8}$$ ton- CO$$_{2}$$/yr. The sum of these is about 47% of 9.13$$times$$10$$^{8}$$ ton- CO$$_{2}$$/yr which is CO$$_{2}$$ reduction target in 2050, for which deployment of 52 plants in Japan and 113 plants abroad, with each plant containing four 600 MWt reactor units, is required.

Journal Articles

Corrosion of 9-12Cr ferritic-martensitic steels in high-temperature CO$$_{2}$$

Rouillard, F.*; Furukawa, Tomohiro

Corrosion Science, 105, p.120 - 132, 2016/04

https://doi.org/10.1016/j.corsci.2016.01.009
 Times Cited Count：117 Percentile：97.47(Materials Science, Multidisciplinary)

The high temperature corrosion behavior of two 9Cr and 12Cr ferritic-martensitic steel grades was studied under CO$$_{2}$$ pressure varying from 1 to 250 bar for exposure times up to 8000 h. No breakaway oxidation was observed. 9Cr steel grades suffered from fast parabolic uniform oxidation and fast carburisation. Increasing CO$$_{2}$$ pressure had very little effect on the oxidation rate but increased the carburisation rate. The corrosion behavior of both 12Cr steel grades differed and might be influenced by gas composition, minor elements or surface finish. A corrosion mechanism coupling oxidation and carburisation is proposed.

Journal Articles

Development of CO$$_{2}$$ laser interferometer/polarimeter system in JT-60SA

Sasao, Hajime; Kawano, Yasunori*; Arakawa, Hiroyuki; Sakuma, Takeshi; Imazawa, Ryota; Kubo, Hirotaka; Itami, Kiyoshi

Journal of Instrumentation (Internet), 11, p.C02082_1 - C0208_11, 2016/02

https://doi.org/10.1088/1748-0221/11/02/c02082

Development of CO$$_{2}$$ laser interferometer/polarimeter system for JT-60SA has progressed. The CO$$_{2}$$ laser interferometer/polarimeter system consists of a two color heterodyne interferometer and a polarimeter based on dual PEMs. In JT-60SA, the laser interferometer/ polarimeter system is located in a diagnostic room apart from the tokamak hall, and the laser transmission length is about 200 m. Therefore, it is a key issue for the reliable measurement to transmit the laser light with high stability for the long distance. To realize the stable long-distance transmission, new technologies are developed including a laser spectral beam profile monitor for two color lasers and a laser axis stabilizing system. In addition, a new method for expansion of polarization angle is developed to improve measurement resolution of the polarimeter.

Journal Articles

Process evaluation of use of High Temperature Gas-cooled Reactors to an ironmaking system based on Active Carbon Recycling Energy System

Hayashi, Kentaro*; Kasahara, Seiji; Kurihara, Kohei*; Nakagaki, Takao*; Yan, X.; Inagaki, Yoshiyuki; Ogawa, Masuro

ISIJ International, 55(2), p.348 - 358, 2015/02

https://doi.org/10.2355/isijinternational.55.348
 Times Cited Count：11 Percentile：44.17(Metallurgy & Metallurgical Engineering)

Reducing coking coal consumption and CO$$_{2}$$ emissions by application of iACRES (ironmaking system based on active carbon recycling energy system) was investigated using process flow modeling to show effectiveness of HTGRs (high temperature gas-cooled reactors) adoption to iACRES. Two systems were evaluated: a SOEC (solid oxide electrolysis cell) system using CO$$_{2}$$ electrolysis and a RWGS (reverse water-gas shift reaction) system using RWGS reaction with H$$_{2}$$ produced by IS (iodine-sulfur) process. Both the effects on saving of the coking coal and reduction of CO$$_{2}$$ emissions were greater in the RWGS system. It was the reason of the result that excess H$$_{2}$$ which was not consumed in the RWGS reaction was used as reducing agent in the BF as well as CO. Heat balance in the HTGR, SOEC and RWGS modules were evaluated to clarify process components to be improved. Optimization of the SOEC temperature was desired to reduce Joule heat input for high efficiency operation of the SOEC system. Higher H$$_{2}$$ production thermal efficiency in the IS process for the RWGS system is effective for more efficient HTGR heat utilization. The SOEC system was able to utilize HTGR heat to reduce CO$$_{2}$$ emissions more efficiently by comparing CO$$_{2}$$ emissions reduction per unit heat of HTGR.

Journal Articles

A New visualization technique for the study of the accumulation of photoassimilates in wheat grains using [$$^{11}$$C]CO$$_{2}$$

Matsuhashi, Shimpei; Fujimaki, Shu; Uchida, Hiroshi*; Ishioka, Noriko; Kume, Tamikazu

Applied Radiation and Isotopes, 64(4), p.435 - 440, 2006/04

https://doi.org/10.1016/j.apradiso.2005.08.020
 Times Cited Count：19 Percentile：75.96(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Incorporation of CO$$_{2}$$ exchange processes into a multilayer atmosphere-soil-vegetation model

Nagai, Haruyasu

Journal of Applied Meteorology, 44(10), p.1574 - 1592, 2005/10

This paper describes the incorporation of CO$$_{2}$$ exchange processes into an atmosphere-soil-vegetation model SOLVEG and examination of its sensitivity and impact of its stomatal resistance calculation on the latent heat flux over a winter wheat field. The model framework for the heat and water exchanges between the atmosphere and ground surface was validated in the previous papers (Nagai 2002, 2003). In this study, CO$$_{2}$$ exchange processes are incorporated in the model and the performance is examined. In the test calculation, the model simulated the CO$$_{2}$$ flux at 2 m above the ground well as a whole. A sensitivity test to clarify uncertainties for the model settings and parameters showed that the CO$$_{2}$$ production in the soil is the most important factor for the CO$$_{2}$$ calculation. Also, the impact of the CO$$_{2}$$ processes on the latent heat flux is discussed. The results indicate that the new model is effective and preferable to study surface exchanges of heat and water as well as CO$$_{2}$$.

Journal Articles

Electron density behavior during fast termination phase of post-disruption runaway plasma

Kawano, Yasunori; Nakano, Tomohide; Asakura, Nobuyuki; Tamai, Hiroshi; Isayama, Akihiko; Kondoh, Takashi; Hatae, Takaki; Takenaga, Hidenobu; Ide, Shunsuke

Purazuma, Kaku Yugo Gakkai-Shi, 81(10), p.743 - 744, 2005/10

http://doi.org/10.1585/jspf.81.743

Electron density of post-disruption runaway plasmas in JT-60U has been measured by the tangential CO$$_{2}$$ laser interferometer. Increases in electron density after the first drop of runaway plasma current have been observed during a fast termination phase of the runaway plasma. At the second current drop, an increase in electron density with multiple spikes or oscillation with the period of 1 ms has been found. It is suggested that the increased electron density seems to take part in the shorter current decay time after the second current drop.

Journal Articles

Recent R&D of Thomson scattering diagnostics for JT-60U and ITER

Hatae, Takaki; Kondoh, Takashi; Naito, Osamu; Nakatsuka, Masahiro*; Yoshida, Hidetsugu*

Proceedings of 12th International Symposium on Laser-Aided Plasma Diagnostics (LAPD-12) (CD-ROM), 6 Pages, 2005/09

no abstracts in English

Journal Articles

The Oxidation performance test of detritiation system under existence of CO and CO$$_{2}$$

Kobayashi, Kazuhiro; Terada, Osamu*; Miura, Hidenori*; Hayashi, Takumi; Nishi, Masataka

Fusion Science and Technology, 48(1), p.476 - 479, 2005/07

https://doi.org/10.13182/FST05-A969
 Times Cited Count：10 Percentile：55.21(Nuclear Science & Technology)

To construct the ITER with high safety and acceptability, it is necessary to establish and to ensure the tritium safe handling technology. The performance of the detritiation system at the off-normal events has not been confirmed well. To obtain performance data of detritiation system at the off normal events, the detritiation experiment was performed at TPL/JAERI using a scaled detritiation system for the oxidation performance test. The detritiation system consists of two oxidation catalyst beds (473K and 773K) and a molecular sieve drying absorber. Basic performance of the detritiation system for hydrogen and methane in air was evaluated under maximum ventilation flow rate. Obtained oxidation efficiency was more than 99.99% for hydrogen in the catalyst bed of 473K and more than 99.9% for methane in the 773K one, respectively. It was confirmed that these performances were maintained even under carbon dioxide , carbon monoxide if oxygen remained in the process gas.

JAEA Reports

Atmosphere-soil-vegetation model including CO$$_{2}$$ exchange processes; SOLVEG2

Nagai, Haruyasu

JAERI-Data/Code 2004-014, 92 Pages, 2004/11

JAERI-Data-Code-2004-014.pdf:11.03MB

A new atmosphere-soil-vegetation model named SOLVEG2 (SOLVEG version 2) was developed to study the heat, water, and CO$$_{2}$$ exchanges between the atmosphere and land-surface. The model consists of one-dimensional multilayer sub-models for the atmosphere, soil, and vegetation. It also includes sophisticated processes for solar and long-wave radiation transmission in vegetation canopy and CO$$_{2}$$ exchanges among the atmosphere, soil, and vegetation. The model can be also used by coupling with a three-dimensional atmosphere model. In this paper, details of SOLVEG2, which includes the function of coupling with atmosphere model MM5, are described.

Journal Articles

Silicon isotope separation utilizing infrared multiphoton dissociation of Si$$_{2}$$F$$_{6}$$ irradiated with two-frequency CO$$_{2}$$ laser lights

Yokoyama, Atsushi; Oba, Hironori; Hashimoto, Masashi; Katsumata, Keiichi; Akagi, Hiroshi; Ishii, Takeshi*; Oya, Akio*; Arai, Shigeyoshi*

Applied Physics B, 79(7), p.883 - 889, 2004/11

https://doi.org/10.1007/s00340-004-1642-z
 Times Cited Count：10 Percentile：43.89(Optics)

Silicon isotope separation has been done utilizing the Infrared Multiphoton Dissociation of Si$$_{2}$$F$$_{6}$$ irradiated with two-frequency CO$$_{2}$$ laser lights. The two-frequency excitation method improved the separation efficiency with keeping the high enrichment factors. For example, Si$$_{2}$$F$$_{6}$$ with the $$^{28}$$Si fraction of 99.4 % was obtained at 40.0 % dissociation of Si$$_{2}$$F$$_{6}$$ after the simultaneous irradiation of 100 pulses with 966.23 cm$$^{-1}$$ photons (0.089 J/cm$$^{2}$$) and 954.55 cm$$^{-1}$$ photons (0.92 J/cm$$^{2}$$), while 1000 pulses were needed to obtain 99.0 % of $$^{28}$$Si at 27.2 % dissociation in the case of single frequency irradiation at 954.55 cm$$^{-1}$$ (0.92 J/cm$$^{2}$$). The single-step enrichment factors of $$^{29}$$Si and $$^{30}$$Si increased with increasing Si$$_{2}$$F$$_{6}$$ pressure. The reason for this enhancement has been discussed in terms of the rotational and vibrational relaxations by collisions with ambient gases.

Journal Articles

Toroidal interferometer/polarimeter density measurement system on ITER

Kondoh, Takashi; Costley, A. E.*; Sugie, Tatsuo; Kawano, Yasunori; Malaquias, A.*; Walker, C. I.*

Review of Scientific Instruments, 75(10), p.3420 - 3422, 2004/10

https://doi.org/10.1063/1.1786640
 Times Cited Count：23 Percentile：71.16(Instruments & Instrumentation)

In order to measure the line average electron density on ITER, a CO$$_{2}$$ laser interferometer/polarimeter system is being developed. The design of the interferometer/polarimeter is improved from the previous design, which uses CO$$_{2}$$ and CO laser, on the basis of experience gained with a dual CO$$_{2}$$ system on JT-60U in which good reliability was confirmed for both interferometry and polarimetry operation. The performance of the dual CO$$_{2}$$ laser meets requirements for ITER (accuracy; 1%, time resolution; 1 ms).

Journal Articles

Magnetic structures and spin states of NdBaCo$$_{2}$$O$$_{5}$$

Soda, Minoru*; Yasui, Yukio*; Ito, Masafumi*; Iikubo, Satoshi*; Sato, Masatoshi*; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 73(2), p.464 - 468, 2004/02

https://doi.org/10.1143/JPSJ.73.464
 Times Cited Count：42 Percentile：80.95(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic structures of high temperature phases of TbBaCo$$_{2}$$O$$_{5.5}$$

Soda, Minoru*; Yasui, Yukio*; Fujita, Toshiaki*; Miyashita, Takeshi*; Sato, Masatoshi*; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 72(7), p.1729 - 1734, 2003/07

https://doi.org/10.1143/JPSJ.72.1729
 Times Cited Count：76 Percentile：89.88(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

CO$$_2$$ hydrate; Synthesis, composition, structure, dissociation behavior, and a comparison to structure I CH$$_4$$ hydrate

Circone, S.*; Stern, L. A.*; Kirby, S. H.*; Durham, W. B.*; Chakoumakos, B. C.*; Rawn, C. J.*; Rondinone, A. J.*; Ishii, Yoshinobu

Journal of Physical Chemistry B, 107(23), p.5529 - 5539, 2003/06

https://doi.org/10.1021/jp027391j
 Times Cited Count：201 Percentile：96.33(Chemistry, Physical)

no abstracts in English

Journal Articles

Estimation of $$^{14}$$CO$$_{2}$$ flux at soil-atmosphere interface and distribution of $$^{14}$$C in forest ecosystem

Koarashi, Jun; Amano, Hikaru; Atarashi-Andoh, Mariko; Iida, Takao*; Moriizumi, Jun*

Journal of Environmental Radioactivity, 60(3), p.249 - 261, 2002/06

https://doi.org/10.1016/S0265-931X(01)00084-4
 Times Cited Count：16 Percentile：34.86(Environmental Sciences)

no abstracts in English

Journal Articles

High enrichment of $$^{28}$$Si by infrared multiple photon decomposition of Si$$_{2}$$F$$_{6}$$

Yokoyama, Atsushi; Oba, Hironori; Shibata, Takemasa; Kawanishi, Shunichi*; Sugimoto, Shunichi*; Ishii, Takeshi*; Oya, Akio*; Miyamoto, Yoshiki*; Isomura, Shohei*; Arai, Shigeyoshi*

Journal of Nuclear Science and Technology, 39(4), p.457 - 462, 2002/04

https://doi.org/10.3327/jnst.39.457
 Times Cited Count：3 Percentile：22.51(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Pressure dependence of supercritical carbon dioxide extraction equilibrium of palladium(II) with 2-Methyl-8-quinolinol

Ogiyanagi, Jin; Meguro, Yoshihiro; Yoshida, Zenko; Ohashi, Kozaburo*

Analytical Sciences (CD-ROM), 17(Suppl.), p.717 - 720, 2002/03

no abstracts in English

90 (Records 1-20 displayed on this page)