Studies on Electrochemical Hydrogen Gas Separation Using Proton Conducting Ceramics

质子导电陶瓷电化学分离氢气的研究

• 批准号: 63470061
• 负责人: IWAHARA Hiroyasu
• 金额: $ 5.44万
• 依托单位: Nagoya University (1989-1990)Tottori University (1988)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63470061/
• 关键词: Hydrogen Separation; Protonic Conductor; Hydrogen Sulphide; Hydrogen Sensor; Control of Hydrogen Partial Pressure; Mobility; Concentration Cell; Ceramics; プロトン; イオウ; 拡散限界電流; プロパン; 電位走査法; プロトン導電性セラミックス; 水素選択透過; 水素混合ガス; ペロブスカイト型酸化物; プロトン導電率

The aim of this project is to study on the development of a new hydrogen separation method using a series of high temperature proton conducting ceramics found by us. Followings are the results of our studies.1. Hydrogen Gas Separation from High Temperature Gas MixturesUsing proton conducting ceramics based on SrCeO_3 as a solid electrolyte diaphragm, electrochemical hydrogen separation has been confirmed experimentally. This method could be applied to hydrogen extraction from a gas mixture of hydrocarbons and hydrogen. A small scale hydrogen separator was fabricated by way of experiment using a tube of proton conducting ceramic, and hydrogen was successfully extracted from the thermally decomposed gas of hydrogen sulphide. This separator could be used as a controller of hydrogen partial pressure.2. Development of High Temperature Hydrogen Gas Sensor for SeparatorHigh temperature hydrogen sensors indispensable for this type of separator were developed using the proton conducting ceramics as a solid electrolyte. Characteristics were studied under various conditions.3. Studies on Behavior of Protons in SrCeO_3-based CeramicsConcentration and mobility of proton were determined systematically by a thermal desorption method under various conditions, and the behavior of protons in the oxides was discussed.4. Synthesis of New Proton Conductors for SeparatorBaCe_<1-x> Sm_x O_<3-alpha> ceramics were found to be highly conductive protonic conductors and some CaZrO_3-based ceramics to be good protonic conductors stable against CO_2 at high temperature.

该项目的目的是研究利用我们发现的一系列高温质子传导陶瓷开发一种新的氢分离方法。以下是我们的研究结果： 1．高温气体混合物中氢气的分离采用基于SrCeO_3的质子传导陶瓷作为固体电解质隔膜，电化学氢气分离已得到实验证实。该方法可应用于从碳氢化合物和氢气的气体混合物中提取氢气。利用质子传导陶瓷管通过实验制作了小型氢气分离器，成功地从硫化氢热分解气体中提取出氢气。该分离器可作为氢气分压控制器。 2．分离器用高温氢气传感器的开发使用质子传导陶瓷作为固体电解质，开发了此类分离器必不可少的高温氢气传感器。研究了不同条件下的特性； 3．质子在SrCeO_3基陶瓷中的行为研究采用热脱附法系统测定了不同条件下质子的浓度和迁移率，并讨论了质子在氧化物中的行为。 4．用于隔膜的新型质子导体的合成BaCe_<1-x>Sm_xO_<3-α>陶瓷是高导电质子导体，一些CaZrO_3基陶瓷是高温下对CO_2稳定的良好质子导体。