Removal of Oxygen and Water from an Inert Gas with ITM Cells
Publication Date: 2003-Sep-12
The IP.com Prior Art Database
Oxygen can be recovered from air at high temperatures by passing a hot, oxygen-containing gas, preferably air, over non-porous, solid electrolyte ceramic membranes. These membranes, known in the art generically as ion transport membranes (ITMs), utilize an electro-chemical potential difference across the membrane to cause oxygen ions to migrate through the membrane. Membranes can be fabricated as tubes or flat plates that are arranged in modules for efficient contacting with hot air. High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules. The oxygen product can also be provided at elevated pressures via the electrochemical compression capabilities of the membrane. A comprehensive review of ion transport membranes is given by J. D. Wright and R. J. Copeland in Report No. TDA-GRI-90/0303 prepared for the Gas Research Institute, September 1990.