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Integral Heat Exchanger for Oxygen Ion Transport Membrane Vessel

IP.com Disclosure Number: IPCOM000028115D
Publication Date: 2004-Apr-26
Document File: 3 page(s) / 14K

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Integral Heat Exchanger for Oxygen Ion Transport Membrane Vessel

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

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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 High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules.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 one type of oxygen ion transport membrane vessel design, the hot, oxygen-containing gas is fed to a duct enclosing the membranes within the vessel. In this scenario, the production of oxygen through ion conducting membranes requires that hot oxygen be transferred from the vessel through external piping to an external heat exchanger (see Figure 1).

It is proposed that the removal of heat from the oxygen stream take place within the vessel, in conjunction with the oxygen manifolds. This heat exchange could be accomplished using any one of many conventional techniques, such as a shell and tube exchanger. The cooling stream could be air...