Porous Media Burner Integrate with ITM Oxygen
Publication Date: 2003-Sep-24
The IP.com Prior Art Database
Porous Media Burner Integrated with ITM Oxygen
Oxygen can be recovered from air at high temperatures by passing hot, oxygen-containing gas, preferably air, over non-porous, mixed conducting ceramic membranes. These membranes, known in the art generically as ion transport membranes (ITMs), utilize an oxygen partial pressure differential 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 contact with the hot compressed air. High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules. 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.
In the design proposed here, a tubular ITM membrane is surrounded by a tubular porous media burner. High pressure feed air is introduced to the ID of the ITM tube. Pure oxygen diffuses through the ITM into the annular space between the tube and the porous media burner. The oxygen passing through the porous media burner reacts with fuel on the OD of the burner tube, such that oxidizing conditions are maintained on the burner tube OD. The radiant heat produced by the combustion reduces or eliminates the need to preheat the air fed into the process.
Possible variations include the introduction of an inert sweep gas to the annular space to increase the ITM...