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Page 1 Honeywell High Temperature Membrane for OBIGGS Application Lisbon 11/15/2004 Jim Zhou.

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Presentation on theme: "Page 1 Honeywell High Temperature Membrane for OBIGGS Application Lisbon 11/15/2004 Jim Zhou."— Presentation transcript:

1 Page 1 Honeywell High Temperature Membrane for OBIGGS Application Lisbon 11/15/2004 Jim Zhou

2 Page 2 Outline Objectives Why high temperature membrane? Fiber spinning conditions Test results Conclusions

3 Page 3 Objectives Objectives To develop a high temperature gas separation hollow fiber membrane suitable for the OBIGGS application Why high temperature membrane? Reduce the size and volume of the OBIGG system by taking advantage of higher gas permeability at higher temperatures and reduced cooling requirements at higher OBIGGS operating temperature

4 Page 4 Membrane Material Selection Honeywell’s Innovative High Temperature Membrane High O 2, N 2 permeability High O 2 /N 2 Selectivity Wet spun with very thin selective layer to increase flux Less susceptible to contaminants Large operating temperature and pressure range

5 Page 5 Membranes and Membrane Modules This illustration shows how fast gases like oxygen and moisture permeate the surface of the individual membrane fibers while nitrogen molecules remain inside and are delivered as the product gas. Feed Air Nitrogen Oxygen Water Vapor Nitrogen Oxygen and water vapor are “fast” gases which quickly permeate the membrane, allowing nitrogen to flow through the fiber bores as the product stream.

6 Page 6 Membranes and Membrane Modules Thousands of individual fibers wrapped around a core make up the nitrogen generating hollow fiber membrane module. The engineering of the module is important to maximizing the performance of the whole system. End Plate Epoxy Tube Sheet Support Core Feed Air O-Rings Hollow Fibers Oxygen- Enriched Air Epoxy Tube Sheet Enriched Nitrogen Product Gas

7 Page 7 Fiber Spinning Conditions Phase inversion/Wet spinning process Pros  Can produce membrane with extremely thin selective layer (Asymmetrical membrane structure) Cons  Porous support layer may not be stable at high temperatures  Complex spinning and solvent leaching process  Membrane selectivity changes with the amount of solvent left behind

8 Page 8 Typical Fiber Spinning Conditions Fiber spinning condition ranges  Polymer dope rate: 1.2 to 2.5 g/min/per strand  Speed:75 to 250 ft/min(23 to 76 m/min)  Center solvent rate:0.5 to 2.0 ml/min  Temperature:Room to 100 o C  Fiber ID:100 to 160 micron  Fiber OD:150 to 300 micron

9 Page 9 Membrane Structure Thin skin layer with porous support High gas flux

10 Page 10 Test Results

11 Page 11 Test Results

12 Page 12 Test Results

13 Page 13 Air Separation Modules

14 Page 14 Conclusions Membrane is stable at operating temperatures up to 160C Membrane flux increase with increase temperature Membrane performance influenced by spinning conditions High temperature membrane offers advantages over conventional membranes

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