CAPE-OPEN at IVC-SEP
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Transcript of CAPE-OPEN at IVC-SEP
DTU, Technical University of Denmark
CAPE-OPEN at IVC-SEP
Martin P. Breil
Co-LaN Annual General Meeting Selwyn College, Cambridge
3-4 April 2008
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IVC-SEP
Mærsk Olie og Gas AS
Welltec
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Overview
• IVC-SEP ThermoSystem– A short update on the ThermoSystem
• CO2 absorber– General theory– CAPE-OPEN way– Results
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Models involved
• ThermoSystem contains – CPA, – PC-SAFT, – SRK and PR
• CPA and PC-SAFT are associating models (H-bonds)
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Model parameters
• SRK and PR are 3-parameter modelsa0 energy b co-volumec1 correlation (T-dependence on a0)
• Based on the critical properties (Tc,Pc,)
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Model parameters
• CPA is a 5-parameter modela0 energy b co-volumec1 correlation (T-dependence on a0) asc energy asc volume factor
CPA reduces to SRK when no asc.
G.M. Kontogeorgis, M.L. Michelsen, G.K. Folas, S.O. Derawi, N. von Solms, and E.H. Stenby. Ten years with the CPA (Cubic-Plus-Association) equation of state. Part I. Pure compounds and self-associating systems. Ind. Eng. Chem. Res., 45:4855, 2006.
G.M. Kontogeorgis, M.L. Michelsen, G.K. Folas, S.O. Derawi, N. von Solms, and E.H. Stenby. Ten years with the CPA (Cubic-Plus-Association) equation of state. Part II. Cross-associating and multicomponent systems. Ind. Eng. Chem. Res., 45:4869, 2006.
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New features
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New features
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New features
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New features
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Runs in …
• Aspen2-phase flashacetic acid 0.40water 0.40benzene 0.20
at T = 130 C andP = 3.5 bar
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Runs in…
• COCO
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Runs in…
• PRO/II
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Conclusions on ThermoSystem
• Finally compliant with PRO/II (8.0.3).
• Only contains a PT flash algorithm.
• Comments to PRO/II– It is not possible to produce phase envelopes of CO-
packages (but the built-in ones)
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PhD course
Thermodynamic Models:Fundamentals & Computational Aspects
January 2009
Michael Michelsen and Jørgen Mollerup
– More on www.ivc-sep.kt.dtu.dk
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CO2 absorber
• Contribute to the development of efficient CO2 capture for coal-fired power plants
• 1/3 of man-made CO2
from generation of electricity• Denmark mainly coal• Keep electricity infrastructure
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Technology
CO2
Alkanolamine
Flue gas
Clean Flue Gas
Simplified flow-sheet for CO2 Capture using Alkanolamines
Absorption of CO2 from coal fired power plants with aqueous solutions of alkanolamines
Chemical reactions
CO2 + 2 R2NH
<=>
R2NH2+ + R2NCOO–
OHN
H
HOH
CH3 NH2
By courtesy of Jostein Gabrielsen
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Absorber
Flue gasw. CO2
Amine rich
Amine lean
Clean flue gasHeight = 4.36 mDiameter = 15 cm
dll
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Setting-up the ODEs
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Setting-up the ODEs
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Boundary value problem• Example
• Numerical solutionby collocation(Shampine et al.)
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y(t)BCs
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Available on the web: Shampine, Muir, and Xu A user-friendly FORTRAN BVP solver
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Results
• Implementation in Aspen• COCO
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Results from CO2 absorber
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AMPFull – vapourDash - liquid
Temperature profile in tower
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Conclusion on Unit Operations
• Once the legacy code is provided, it is straightforward to produce a CO-version
• Unfortunately, the engineers at the power plants do not use CO-compliant PMEs.(They build on in-house simulators)
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Acknowledgement• Members of the Chigp project
– BP (UK/US), – Maersk Oil and Gas (Denmark), – Statoil (Norway), and – TOTAL (France)
• Members of the CO2 capture project– DONG (Denmark) and – Vattenfall (Denmark/Sweden).
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Thank you for your attention.