Hydrogen Purification in Palladium-Based Membranes: An Operando X-ray Diffraction Study
Journal Article
·
· Industrial and Engineering Chemistry Research
- Stanford Univ., Stanford, CA (United States)
- Applied Materials, Sunnyvale, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Worcester Polytechnic Institute, Worcester, MA (United States)
Palladium (Pd)-based membranes are highly selective to H2, compact, and operationally flexible, and they could facilitate efficient and on-demand production of H2 as a clean energy carrier. For the first time, we designed an operando X-ray diffraction (XRD) experiment to study a dense Pd membrane during H2 permeation at typical operating conditions (e.g., 280–440 °C and 1–3 bar pressure difference). By correlating the lattice structure of a metallic membrane with its gas-separation performance in real time, the operando XRD experiment could serve as a diagnostic tool for research on high-temperature gas-separation membranes. As a proof-of-concept study, we simultaneously collected H2-flux and transmission-XRD measurements, from which we calculated key hydrogen-transport properties, including permeability, solubility, and diffusivity. We also showed that the Pd lattice remained in the α phase throughout the operating conditions investigated. Furthermore these results are in reasonable agreement with the literature.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1503641
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 2 Vol. 58; ISSN 0888-5885
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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