Investigation of efficient electro chemical reactor utilizing hydrogen

利用氢气的高效电化学反应器的研究

• 批准号: 09650908
• 负责人: EGUCHI Koichi
• 金额: $ 2.11万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650908/
• 关键词: fuel cell; production of hydrogen; steam reforming; methane; methanol; CO2 reforming; CO shift reaction; 水蒸気改質反応; 固体酸化物燃料電池; 内部改質; 高分子電解質燃料電池; 水性ガスシフト反応; 電極触媒; CO選択酸化反応

Hydrogen is regarded as one of the most important energy sources to Produce heat, electricity, power energy and in dustries in the near future.One efficient utilization of hydregen is an application to fuel cells (FC_s)which have been act ively investigated as an efficient power generationsystem for the future application. The present investigation focused o n the chemical reaction at the fuel side of solid oxide fuel cells (SOFC_s) andpolymer electrolyte fuel cells (PEFC_s).Ni-YSZ (yttria-stabilized zirconia) cermet has been most popularlyemployed as a fuel electrode material in the SOF C system. Since the SOFC is operated around 1000ﾟC, it allows reforming of hydrocarbons within the fuelcell (internal ref orming). Hydrogen and carbon monoxide, produced throughthe internal reforming reaction, can react with oxide ions and be directlyused as the fuel. Information on the internal reforming was obtained from the gas phase analysis during the power generation experiments. Al thoughsteam r … More eforming and CO2 reforming of methane are suitable way to generateelectrical power from methane fueled SOFC, carbon deposition on the anodeleads to deactivation of the catalyst when the concentration of C H4 is excess to steam or CO2. The carbon deposition and deterioration of the power generation was also observed in the case of ethylene and ethane fueled SOFC.However, this deterioration was irreversible and the performance of the cell was not recovered after removal of the deposited carbon on theanode. Methanol fueled SOFC demonstrated excellent performance with out the carbon depositionMethanol is regarded as most desirable chemical existing as liquid at ambient temperature for PEFC applications. S team reforming of methanol is established as hydrogen production technology. However, a small amount of CO in the reformed fuel deteriorates a Pt electrode in the PEFC and the cell performance is lowered heavily. Cu/A12O3-ZnO demonstratedexcelle nt activity for CO removal in the methanol steam reformed gas viawater gas shift reaction (WGSR). However, the catalytic activity is insufficient at low temperature to attain the situation close to the equilibrium. This indicates that removal o f the slight amount of CO in the reformed gas is difficult only through WGSR.A small amount of 02 additionto the post-met hanol reforming gas was effective to enhance the CO removalthrough CO oxidation. Less

氢气被认为是未来生产热能、电能、动力能和工业品的重要能源之一，氢气的有效利用之一是在燃料电池（FC_s）中的应用。本文主要研究固体氧化物燃料电池（SOFC_s）和聚合物电解质燃料电池（PEFC_s）燃料侧的化学反应，其中Ni-YSZ（Yttria-stabilized zirconia）金属陶瓷是目前SOFC系统中最常用的燃料电极材料。由于固体氧化物燃料电池在1000摄氏度左右运行，它允许燃料电池内的碳氢化合物重整（内部重整）。通过内部重整反应产生的氢气和一氧化碳可以与氧离子反应，直接用作燃料。从发电实验期间的气相分析获得关于内部重整的信息。阿尔苏斯特姆河 ...更多信息 甲烷的重整和CO2重整是甲烷燃料SOFC发电的合适途径，当CH 4浓度超过水蒸气或CO2浓度时，阳极上会积碳，催化剂会失活。在以乙烯和乙烷为燃料的SOFC中也观察到了积碳和发电性能的劣化，但这种劣化是不可逆的，去除阳极上的积碳后电池的性能并没有得到恢复。以甲醇为燃料的固体氧化物燃料电池表现出了优异的性能，而且没有积碳现象，甲醇被认为是室温下以液体形式存在的固体氧化物燃料电池最理想的燃料。甲醇水蒸气重整制氢技术被确立为制氢技术。然而，重整燃料中的少量CO使PEFC中的Pt电极劣化，并且电池性能严重降低。Cu/Al_2 O_3-ZnO催化剂对甲醇水蒸气转化气中的CO具有良好的脱除活性。然而，在低温下催化活性不足以达到接近平衡的情况。结果表明，甲醇后重整气中少量的CO难以通过WGSR脱除，在甲醇后重整气中加入少量的O2可有效提高CO氧化脱除率。少

项目成果

Koshi Sekizawa,Sei-ichi Yano,Koichi Eguchi,Hiromichi Arai: "Selectiv removal of CO in methanol reformed gas over Cu-supported mixed metal oxides" Applid Catalysis A: General. 169. 291-297 (1998)

Koshi Sekizawa、Sei-ichi Yano、Koichi Eguchi、Hiromichi Arai：“通过铜负载的混合金属氧化物选择性去除甲醇重整气体中的 CO”应用催化 A：概述。

K.Sekizawa,S.Yano,K.Eguchi,H.Arai: "Selective Removal of CO in Methanol Reformed Gas over Cu-supported Mixed Metal Oxides" Applied Catalysis,A:General. (印刷中). (1998)

K.Sekizawa、S.Yano、K.Eguchi、H.Arai：“通过铜负载混合金属氧化物选择性去除甲醇重整气体中的 CO”，应用催化，A：综述（1998 年出版）。

Zhiming Gao, Koshi Sekizawa, Koichi Eguchi: "Power Generation Characteristics of SOFC Internal CO2 Reforming of Methanol" DENKI KAGAKU. in press. (1999)

高志明、关泽幸志、江口浩一：“SOFC内部CO2重整甲醇的发电特性”电气化学。

Koshi Sekizawa, Sei-ichi, Yano Koichi Eguchi, Hiromichi Arai: "Selective removal of CO in methanol reformed gas over Cu-supported mixed metal oxides" Applied Catalysis A : General. 169. 291-297 (1998)

Koshi Sekizawa、Sei-ichi、Yano Koichi Eguchi、Hiromichi Arai：“通过 Cu 负载的混合金属氧化物选择性去除甲醇重整气体中的 CO”应用催化 A：概述。

Zhiming Gao, Koshi Sekizawa, Koichi Eguchi: "Power Generation Characteristics of SOFC Internal CO2 Reforming of Methanol" DENKI KAGAKU. (in press). (1999)

高志明、关泽幸志、江口浩一：“SOFC内部CO2重整甲醇的发电特性”电气化学。