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Alternative Process Vessel Arrangement for ITM Oxygen

IP.com Disclosure Number: IPCOM000021005D
Publication Date: 2003-Dec-16
Document File: 4 page(s) / 188K

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Alternative Process Vessel Arrangement for 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 High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules.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.

All of the conceptual process vessel designs for ITM oxygen have had in common manifold piping arranged perpendicularly to the direction of air flow. The arrangement described here has the potential to reduce overall vessel costs, especially for very large vessels.

The general concept is illustrated in Figures 1, 2, and 3 (not to scale). Manifold pipes are arranged longitudinally within the process vessel, and all are parallel to the air flow. All of the manifold pipes connect with one or more headers which are perpendicular to the air flow.

Depending on the size of the vessel (tonnage capacity), there are several options available through this arrangemen...