首页> 外文期刊>Renewable energy >Influence of vacuum degree on hydrogen permeation through a Pd membrane in different H_2/N_2 gas mixtures
【24h】

Influence of vacuum degree on hydrogen permeation through a Pd membrane in different H_2/N_2 gas mixtures

机译:不同H_2 / N_2气体混合物中PD膜氢渗透对氢渗透的影响

获取原文
获取原文并翻译 | 示例
       

摘要

Palladium (Pd) membranes for industrial applications have gained much interest as of late. The purification of hydrogen through Pd membranes has therefore been proposed as a viable solution to traditional separation methods. Hydrogen permeation can be enhanced when coupled with a vacuum at the permeate side. In this study, the effect of different degrees of vacuum pressures on H-2 permeation through a high-permselectivity Pd membrane in different binary gas mixtures was investigated and compared to those without vacuum. Three feed gases containing H-2 concentrations of 90, 70, and 50 vol% were used. Hydrogen permeation rates were studied at 320, 350, and 380 degrees C under vacuum pressures ranging between 0 and -60 kPa. An increase in vacuum degree intensified H-2 permeation. However, best performance improvements were observed at lower H-2 concentrations, lower temperatures, and also at lower vacuum pressures for all gas mixtures. The highest performance improvement of 88.83% was with the gas mixture containing 50% H-2 at 320 degrees C with a -15 kPa vacuum pressure. Hence, from an efficiency point of view, lower temperatures and vacuum pressures were preferred for all the gas mixtures. Activation Energies were also relatively lower for conditions with a vacuum for all gas mixtures. (C) 2020 Elsevier Ltd. All rights reserved.
机译:用于工业应用的钯(PD)膜截至较晚的兴趣。因此,已经提出了通过PD膜纯化的氢气作为传统分离方法的可行溶液。当与渗透侧的真空偶联时,可以提高氢渗透。在该研究中,研究了不同二元气体混合物中通过高偏移PD膜对H-2渗透的不同程度的真空压力的影响,并与没有真空的那些。使用含有90,70和50体积%的H-2浓度的三种进料气体。在320,350和380℃下在0至-60kPa之间的真空压力下进行氢渗透速率。真空度的增加强化H-2渗透。然而,在较低的H-2浓度,较低温度下,以及所有气体混合物的真空压力下,观察到最佳性能改善。 88.83%的最高性能提高是在320℃下含有50%H-2的气体混合物,具有-15kPa真空压力。因此,从效率的观点来看,对于所有气体混合物,优选较低温度和真空压力。对于所有气体混合物具有真空的条件,活化能量也相对较低。 (c)2020 elestvier有限公司保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号