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Oxygen from ITM Integrated with the Syngas Generation System of a GTL Process Disclosure Number: IPCOM000031523D
Publication Date: 2004-Sep-28
Document File: 2 page(s) / 23K

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Oxygen from ITM Integrated with the Syngas Generation System of a GTL Process

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  High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules.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. 

While ITM technology can be used to directly produce CO+H2 mixtures for the production of liquid hydrocarbons in a Fischer-Tropsch process, the technology can also be used in a conventional process, such as partial oxidation or autothermal reforming.  These oxygen-based syngas-generation technologies require large quantities of oxygen, and thereby require large capital investments.  The addition of convective heat transfer reactors to do additional reforming using sensible heat have been proposed to reduce the amount of oxygen required.  POX/EHTR and ATR/EHTR are process schemes that use convective reforming.  The use of ITM Oxygen to produce at least a part of the required oxygen would further reduce the capital and operating cost associated with the cryogenic production of oxygen.

Significant efficiency im...