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THE DEVELOPMENT OF HYDROGEN SEPARATION METHOD USING HYDROGEN STORAGE ALLOY FILMS

储氢合金膜氢分离方法的开发

基本信息

批准号：
63850167
负责人：
ADACHI Gin-ya
金额：
$ 3.39万
依托单位：
OSAKA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63850167/
关键词：
Hydrogen Separation Hydrogen Storage Alloy LaNi_5 CaNi_5 Hydrogen Separation Factor Gas Permeation Coefficient Carbon Monoxide LaNi_5 CaNi_5 水素重水素水素同位体分離高分子膜

项目摘要

The H_2-CO gas separation has been performed using the Ca-Ni alloy films deposited on a Ni-coated polyner membrane and the resistance of amorphous Ca-Ni alloy files to harmful CO in H_2-CO gas mixtures has been studied.A palladium file is known to exhibit excellent properties for hydrogen separation. The film is, however, very expensive and must be operated at an elevated temperature.LaNi_5 is considered to be a good candidate as a hydrogen separation material because it is less expensive than Pd and has an admirable ability to absorb hydrogen at moderate temperatures and pressures. The amorphous LaNi_5 films exhibited a good separation factor, but the hydrogen permeation rates were insufficient.CaNi_5 can absorb much hydrogen at low pressures in comparison with LaNi_5. In order to increase the hydrogen permeation rate, the development of hydrogen separation film using the Ca-Ni alloy has been performed. The hydrogen separator prepared consisted of polyaside, nickel and amorphous CaNi_<4.2> files. The thickness of metal layer was ca. 1mum. Hydrogen in the applied gas with a composition of 50 mol% H_2 - 50 mol% CO was concentrated to as high as 99 mol% in the permeated gas under the best conditions. It was found that the permeation rate of the Ni/CaNi_<4.2> film was two times as large as that of the Ni/CaNi_5 film.As a result of the experiments using X-ray photoelectron spectroscopy, the amorphous Ca-Ni alloy files had an excellent resistance to harmful CO in the H_2 gas mixtures.

利用沉积在镀镍聚合物膜上的Ca-Ni合金膜进行H_2-CO气体分离，并研究了非晶Ca-Ni合金锉对H_2-CO气体混合物中有害CO的抵抗力。众所周知，钯锉表现出优异的氢气分离性能。然而，该薄膜非常昂贵，并且必须在高温下操作。LaNi_5 被认为是氢分离材料的良好候选者，因为它比 Pd 便宜，并且在中等温度和压力下具有令人钦佩的吸收氢的能力。非晶LaNi_5薄膜表现出良好的分离因子，但氢渗透率不足。与LaNi_5相比，CaNi_5可以在低压下吸收更多的氢。为了提高氢渗透率，已经进行了使用Ca-Ni合金的氢分离膜的开发。制备的氢气分离器由聚酰胺、镍和非晶CaNi_<4.2>锉组成。金属层的厚度约为。 1 妈妈。在最佳条件下，渗透气体中组成为50 mol% H_2 - 50 mol% CO的气体中的氢气浓度高达99 mol%。结果发现,Ni/CaNi_<4.2>薄膜的渗透速率是Ni/CaNi_5薄膜的两倍。X射线光电子能谱实验结果表明,非晶Ca-Ni合金薄膜对H_2混合气体中的有害CO具有优异的抵抗能力。