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Use of a Conformal Layer with an End-Load to Enable Pressurized Operation of a Ceramic Electrochemical Stack

IP.com Disclosure Number: IPCOM000019428D
Publication Date: 2003-Sep-12
Document File: 2 page(s) / 27K

Publishing Venue

The IP.com Prior Art Database

Abstract

Oxygen can be recovered from air at high temperatures by passing 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 applied voltage 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 feed air. High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules. The oxygen can also be produced by the ITM device at pressures exceeding the feed air pressure. 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.

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Use of a Conformal Layer with an End-Load to Enable Pressurized Operation of a Ceramic Electrochemical Stack

Oxygen can be recovered from air at high temperatures by passing 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 applied voltage 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 feed air. High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules. The oxygen can also be produced by the ITM device at pressures exceeding the feed air pressure. 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.

Planar electrochemical stacks, based on the principle described above, can be operated with elevated oxygen pressures. The resulting differential pressure is typically counterbalanced to prevent the stack from failing as a result of the net tensile load. The counterbalancing load is determined based on cross-sectional area of the stack and the operating pressure-differential.

A practical counterbalancing approach is to apply a concentrated load. However, this load must be uniformly distributed to the stack cross-section. A conformin...