Presentation is loading. Please wait.

Presentation is loading. Please wait.

Slide 1. © 2012 Invensys. All Rights Reserved. The names, logos, and taglines identifying the products and services of Invensys are proprietary marks.

Similar presentations


Presentation on theme: "Slide 1. © 2012 Invensys. All Rights Reserved. The names, logos, and taglines identifying the products and services of Invensys are proprietary marks."— Presentation transcript:

1 Slide 1

2 © 2012 Invensys. All Rights Reserved. The names, logos, and taglines identifying the products and services of Invensys are proprietary marks of Invensys or its subsidiaries. All third party trademarks and service marks are the proprietary marks of their respective owners. SSE-02 Using the Membrane Unit in PRO/II New Application Brief U-2 Bernie Unger North American User Group October 14-16

3 Slide 3 Membrane Unit (sometimes called Permeation Unit) Residue Permeate P i, res P i, perm  A simple model to simulate components that can migrate selectively across a membrane.  Composed of a bundle of hollow fibers.  Flow passes from the high pressure feed/residue side to the low pressure permeate side of the fiber

4 Slide 4 Membrane Unit Assumptions  Constant total pressure on both the permeate and feed/residue side  The driving force is partial pressure as calculated by ideal gas law  The permeate side gas is continually swept away from the membrane

5 Slide 5 Membrane Unit where: R i = Flowrate in std. vol/time K i = Permeation constant in vol/(time-area-pres) Area = Membrane area P i = Partial pressure of component i P i, res P i, surf P i, perm

6 Slide 6 Membrane Unit Solution technique  Integrate on dArea Solution characteristics  Based on partial pressure, not fugacity, therefore solutions do not change with change in thermo method  Limiting case of small area: Flowrate can be calculated from product partial pressures  Because permeate is continually carried away from the membrane, a membrane unit with 10 area units will have the exact same performance as ten 1 area unit membrane units in series.

7 Slide 7 Membrane Unit Oil Production with CO 2 Injection Oil/Gas Separator Oil Product Condensate Fuel Gas Membrane CO 2 Recovery Well Production CO 2 Injection CO 2 Makeup

8 Slide 8 Membrane Unit Flowsheet

9 Slide 9 Membrane Unit Flowsheet considerations  The fuel gas is consumed on plant to drive process equipment.  The fuel gas is targeted to 900 Btu/scf for proper equipment operation.  The pressure of the permeate side of the membrane units is adjusted to achieve the heat content.  The pressure drop across the residue side is negligible.  Two membrane shells are included to allow intermediate condensate dropout.  The temperature equilibrates between the permeate and the residue. The product streams have a lower temperature because of the Joule- Thomson effect of the pressure drop.

10 Slide 10 Membrane Unit Feed Stream Rate, 1000*scfh Temperature, F Pressure, psia Molecular Weight Vapor Fraction1.000 Molar Composition 1 - N H2S E CO C C C IC E NC E IC E NC E NC E NC E-03

11 Slide 11 Membrane Unit Feed Stream Rate, 1000*scfh Temperature, F Pressure, psia Molecular Weight Vapor Fraction1.000 Molar Composition 1 - N H2S E CO C C C IC E NC E IC E NC E NC E NC E-03

12 Slide 12 Membrane Unit Vendor Supplied Permeability ComponentPermeability Permeability at 75 Fat 100 Fscfd/ft3/psi N H2S CO C C C IC NC IC NC NC NC

13 Slide 13 Membrane Unit Permeability Fitted to Arrhenious Form ComponentK i,o E i N H2S CO C C C IC NC IC NC NC NC K i = K i,o exp[-E i /(RT)] R = , ft3-psia/R-lb-mol

14 Slide 14 Membrane Unit Modeling Flowsheet

15 Slide 15 Membrane Unit Membrane Unit Icon

16 Slide 16 Membrane Unit Membrane Input

17 Slide 17 Membrane Unit Permeation Calculation

18 Slide 18 Membrane Unit Solution Technique  Calculators are used to set permeation coefficients. It iteratively retrieves temperature from the membrane unit and recalculates the coefficients based on temperature.  A controller is used to adjust the pressure of the permeate to achieve the heat content of the fuel gas.

19 Slide 19 Membrane Unit Results


Download ppt "Slide 1. © 2012 Invensys. All Rights Reserved. The names, logos, and taglines identifying the products and services of Invensys are proprietary marks."

Similar presentations


Ads by Google