High temperature steam separation membrane

Patent · Tue Apr 04 00:00:00 EDT 2023

OSTI ID:1998250

Lee, Tae H.; Balachandran, Uthamalingam

Ceramic proton-conducting oxide membranes are described herein, which are useful for separating steam from organic chemicals under process conditions. The membranes have a layered structure, with a dense film of the perovskite over a porous composite substrate comprising the perovskite material and a metallic material (e.g., Ni, Cu, or Pt). The perovskite comprises an ABO₃-type structure, where “A” is Ba and “B” is a specified combination of Ce, Zr, and Y. The perovskite ceramic materials described herein have an empirical formula of Ba(Ce_xZr_1-x-nY_n)O_3-δ, wherein 0<x<0.8 (e.g., 0.1≤x≤0.7 or 0.2≤x≤0.5); and 0.05≤n≤0.2; and δ=n/2. In some embodiments n is about 0.2. In some other embodiments 0.6≤x≤0.8; and n is about 0.2, such as Ba(Ce_0.7Zr_0.1Y_0.2)O_3-δ, also referred to herein as BCZY712.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-06CH11357
• Assignee: UChicago Argonne, LLC (Chicago, IL)
• Patent Number(s): 11,617,992
• Application Number: 17/168,646
• OSTI ID: 1998250
• Country of Publication: United States
• Language: English