Development of carbon alloy for selective recovery of hydrogen gas under low pressure and for hydrogen-isotope separation

开发用于低压选择性回收氢气和氢同位素分离的碳合金

• 批准号: 21550195
• 负责人: AKUZAWA Noboru
• 金额: $ 3.08万
• 依托单位: Tokyo National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21550195/
• 关键词: 層状; 層間化合物; 水素; 低圧水素回収; 水素同位体分離; カーボンアロイ; ナノスペース

Hydrogen-sorption isotherms of alkali metal-doped carbons at 77 K were determined for promoting application of these materials as hydrogen-recovery and isotope-separation agent. The hydrogen-sorption behavior of rubidium-doped Grafoil, with composition of RbC24, showed high sorption ability against hydrogen at low pressure. Taking into account the fact that sorption-desorption was fast and reversible, and the equilibrium pressure at half coverage was very low, i. e. 40 Pa, RbC24 prepared from Grafoil is promising as a recovery agent for hydrogen gas at low pressure. The hydrogen(H2)/deuterium(D2)-sorption isotherms of potassium-doped carbons with composition of KC10, prepared from multi wall carbon nanotube(MWCNT) and carbons derived from petroleum cokes with heat-treatment temperatures of 1000 and 1500°C, were also determined. Isotope separation coefficient was estimated from those isotherms. A very large isotope effect was found for KC10 prepared from MWCNT, compared with those prepared from carbons with heat-treatment temperatures of 1000 or 1500°C. However, a severe problem was found for KC10(MWCNT) that repetition of the sorption-desorption cycles resulted in the decrease of the sorbed amount of H2 and D2.

测定了碱金属掺杂炭在77 K下的吸氢等温线，为碱金属掺杂炭作为氢回收剂和同位素分离剂的应用提供了依据。掺铷石墨箔（RbC 24）在低压下表现出较强的吸氢能力。考虑到吸附-脱附过程快速可逆，且半覆盖度平衡压力很低的特点，提出了一种新的吸附-脱附方法。e. 40 Pa时，由石墨箔制备的RbC_（24）有望作为低压氢气回收剂。测定了由多壁碳纳米管（MWCNT）和石油焦碳制备的KC 10掺钾碳在1000和1500°C热处理温度下的氢（H2）/氘（D2）吸附等温线。同位素分离系数估计从这些等温线。与由热处理温度为1000或1500°C的碳制备的KC 10相比，发现由MWCNT制备的KC 10具有非常大的同位素效应。然而，对于KCl 10（MWCNT），发现了一个严重的问题，即吸附-解吸循环的重复导致H2和D2的吸附量减少。

项目成果

Application of alkali metal-doped carbons for hydrogen recovery and isotope separation

碱金属掺杂碳在氢回收和同位素分离中的应用

• 期刊: J.Nanoscience and Nanotechnology (Accepted)
• 作者: N.Akuzawa;et al.
• 通讯作者: et al.

カリウム「黒鉛層間化合物による水素吸収と同位体分離

钾“石墨插层化合物的吸氢和同位素分离”

• 发表时间: 2010
• 作者: 荏畑さつき、阿久沢昇;他
• 通讯作者: 他

Superconductive CaC6 prepared from flexible graphite sheets

柔性石墨片制备超导CaC6

• DOI: 10.1016/j.ssc.2012.01.049
• 发表时间: 2012
• 期刊: Solid State Communications
• 影响因子: 2.1
• 作者: R. Matsumoto;M. Arakawa;H. Yoshida;N. Akuzawa
• 通讯作者: N. Akuzawa

アルミナ溶融塩電解に伴うカソード黒鉛の電気抵抗変化-電解温度の効果-

氧化铝熔盐电解引起的阴极石墨电阻变化 - 电解温度的影响 -

• 发表时间: 2011
• 期刊: 炭素
• 作者: 阿久沢昇;古茂田朋寛;玉田耕治;平山貴啓;今川博
• 通讯作者: 今川博