Hydrogen Purification in Palladium-Based Membranes: An Operando X-ray Diffraction Study

Journal Article · Thu Dec 20 00:00:00 EST 2018 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/acs.iecr.8b05017· OSTI ID:1503641

Yuan, Mengyao ^[1]; Lee, Kyoungjin ^[2]; Van Campen, Douglas G. ^[3]; Liguori, Simona ^[4]; Toney, Michael F. ^[3]; Wilcox, Jennifer ^[4]

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1. Stanford Univ., Stanford, CA (United States)
2. Applied Materials, Sunnyvale, CA (United States)
3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
4. 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)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY