COCO - CAPE-OPEN to CAPE-OPEN simulation environment
 Sample Flowsheets
Sample flowsheets
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HDA (HydroDeAlkylation)
fsdHDA.fsd (323 kB) COFE, COUSCOUS, ChemSep, TEA, CORN This case study is a modified version of the 1967 American Institute of Chemical Engineers student contest problem for the dealkylation of toluene to benzene with hydrogen, see "Conceptual Design of Chemical Processes", McGrawHill, 1988, or J.M Douglas, AIChE J., Vol. 31 (1985) p. 353. It features a gas phase reaction with gas recycle as well as a separation train with a recycle of unreacted toluene.
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Cavett-problem
fsdCavett.fsd (121 kB) COFE, COUSCOUS, TEA R.H. Cavett (Cavett, R. H., 'Application of Numerical Methods to the Convergence of Simulated Processes Involving Recycle Loops', American Petroleum Institute, 43, 57, 1963) devised a now famous problem to test tearing, sequencing and convergence procedures of flowsheet simulation programs. The flowsheet is equivalent to a four theoretical stage near isothermal distillation (rather than a conventional near isobaric type).
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Ethanol conversion example
fsdFlowsheetingWithCOCOandChemSep.fsd (116 kB) COFE, ChemSep, COUSCOUS, CORN, TEA This is an example flowsheet for a simple process in which ethanol is converted diethyl ether. The reaction also produces water and two distillation columns are employed to separate the reactor product; unreacted ethanol is recycled. This example is part of an instruction course on the combined use of COCO and The course notes explain how to use COCO and Chemsep in a step-by-step fashion.
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Extractive distillation of MethylCycloHexane/Toluene
fsdCScasebook_MCHT.fsd (external link) COFE, ChemSep, COUSCOUS, TEA We need to separate an equimolar mixture of methylcyclohexane (MCH) and toluene (T), and do so by extractive distillation with phenol (P) as the solvent. The process involves two Chemsep LITE distillation columns, a heat exchanger, and a make-up stream. The phenol recycle is cooled to 100 °C. For a high purity of the products the solvent feed to MCH/toluene feed ratio as well as the reflux ratio needs to be sufficiently high (for the extractive column). We need the make-up unit to regulate the amount of phenol in the feed to the first column.
Source: http://www.chemsep.org/

Pressure swing azeotropic distillation of Methanol and Acetone
fsdPressure_Swing_MA_iecr47p2696.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Adapted from Luyben et al., Ind. Eng. Chem. Res. (2008) 47 pp. 2696-2707
Methanol and acetone form a minimum temperature azeotrope but the composition of this azeotrope is sensitive to the pressure. We can make use of this to separate the two components into pure products by operating two columns at different pressures.
Source: http://www.chemsep.org/

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Benzene-Toluene-Xylene Divided Wall (Petlyuk) Column
fsdBTX_Petlyuk_iecr48p6034.fsd (external link) COFE, ChemSep, TEA Adapted from Luyben et al., Ind. Eng. Chem. Res. (2009) 48 pp. 6034-6049
Benzene-Toluene-Xylene Divided Wall (Petlyuk) Column
Please note that the reflux requirements (and hence the condenser duty) is highly dependent on the selected thermodynamic model and binary interaction parameters given the high purity settings applied.
Source: http://www.chemsep.org/
An alternative separation of this mixture is described in the Chemsep Book; the corresponding flowsheet is CScasebook_BTX.fsd (external link).

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Air Separation Unit
fsdCScasebook_ASU.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Air separation unit
Source: http://www.chemsep.org/

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Separation of Butanol and Water
fsdButanol_Water_ef22p4249.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Adapted from Luyben et al., Ind. Energy Fuels (2008) 22 pp. 4249-4258
Separation of Butanol and Water by making use of the liquid-liquid-equilibria providing a means to break the vapor-liquid azeotrope.
Source: http://www.chemsep.org/

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Butyl Acetate synthesis from Methyl Acetate
fsdButyl_Acetate_iecr50p1247.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Adapted from Luyben et al., Ind. Eng. Chem. Res. (2011) 50 pp. 1247-1263
Process to synthesize Butyl Acetate from Methyl Acetate and Butanol. Note that the temperature of the last column has been increased to 4.4 atm to match the bottom temperature of the Butyl Acetate column. Also realize that the Methyl Acetate recycle rate is a strong function of the chosen thermodynamic models and their interaction parameters.
Source: http://www.chemsep.org/

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Cumene synthesis from Benzene and Propylene
fsdCumene_iecr49p719.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Adapted from Luyben et al., Ind. Eng. Chem. Res. (2010) pp. 719-734
Cumene synthesis from Benzene and Propylene.
Source: http://www.chemsep.org/

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Methanol synthesis from syngas
fsdMethanol_iecr49p6150.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Adapted from Luyben et al., Ind. Eng. Chem. Res. (2010) 49 pp. 6150-6163
Methanol synthesis from syngas. Note that this flowsheet uses fixed conversion rates in the reactor whereas the original publication uses rate equations. Note that the temperature of the vapor overhead recycle of the methanol column is highly dependent on the flow rate and thermodynamic model selection.
Source: http://www.chemsep.org/

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Separation of Ethanol and Water using pervaporization
fsdPervaporation_iecr48p3484.fsd (external link) COFE, ChemSep, COUSCOUS, TEA, SciLab Unit Operation Adapted from Luyben et al., Ind. Eng. Chem. Res. (2009) 48 pp. 3484-3495
Separation of Ethanol and Water using pervaporization to break the azeotrope. Note that the reflux ratio is set instead of the overhead composition because the sensitivity to the binary interaction parameters of the UNIQUAC model and the vapor pressure models. Specification of an 85% overhead would lower the reflux ratio to 2.5, lowering the condenser duty requirement.
Source: http://www.chemsep.org/

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Separation of TetraHydroFuran and Water
fsdTHF_Water_iecr47p2681.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Adapted from Luyben et al., Ind. Eng. Chem. Res. (2008) 47 pp. 2681-2695
Separation of TetraHydroFuran and Water by means of two columns operating and different pressures, with heat integration of the bottoms.
Source: http://www.chemsep.org/

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3-compound flash
fsdFlash-CosmoThermLite.fsd (42 kB) COFE, CosmoTherm, COUSCOUS, TEA This is a simple Flash calculation with three alcohols (methanol, ethanol and iso-propanol), where activity coefficients are computed by the COSMOthermCO model by means of a CAPE-OPEN property calculation routine inside a TEA property package.
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Controlling conversion by manipulating PFR length
fsdcontroller.fsd (108 kB) COFE, COUSCOUS, TEA This example measures reactant flow at the inlet and outlet of a PFR reactor. The measurements are used to calculate the reactant's conversion. A controller is used to modify the reactors length to obtain a specified conversion.
The example demonstrates use of a reaction package, measuring units, an information calculator and a controller. It also demonstrates the use of embedded reports and reactor profile graphs. Note that conversion is calculated here by measuring ethylene flow into and out of the reactor. This is for demonstration purposes; the reactor can be configured such that it exposes conversion of any compound directly.
An alternative version (111 kB) of this flowsheet shows how to control by manipulating a feed flow.

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Combined heat and power cycle
fsdCHP.fsd (38 kB) COFE, COUSCOUS, Water Combined heat and power cycle example, using water as the heat transport medium. The boiler duty is controlled by manipulating the total recycle flow. The client energy consumption is controlled by manipulating recycle flow ratios.
This example demonstrates a closed recycle with a flow-constraint, controllers and embedded reports.

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Water ethanol separation using membrane
fsdWaterEthanolScilab.fsd (81 kB)
fsdWaterEthanolScilabAdiabatic.fsd (81 kB)
COFE, ChemSep, TEA, SciLab Unit Operation Demonstration problem for setting up custom unit operations using formula based input. The examples are available using SciLab, Matlab or Excel to model the custom unit. Each of these requires installation of the proper unit operation tool; these are available from http://www.amsterchem.com/.
Documentation about this demonstration case is available from here:
van Baten, J.M., Taylor, R. and Kooijman, H., Using Chemsep, COCO and other modeling tools for versatility in custom process modeling. Extended abstract of presentation, AIChE annual meeting, Saltlake city, November 2010
A simple model for a membrane separator is used to get around the azeotrope that is present in water-ethanol separation.

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fsdWaterEthanolMatlab.fsd (81 kB)
COFE, ChemSep, TEA, Matlab Unit Operation
fsdWaterEthanolExcel.fsd (129 kB)
COFE, ChemSep, TEA, Excel Unit Operation
Extractive distillation of Methylal from Methanol using DMF
fsdMethylal_DMF_iecr51p1281.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Extractive distillation of Methylal from Methanol using DMF as described by Wang et al. in Ind. Eng. Chem. Res. (2012) Vol. 51 pp. 1281-1292
Source: http://www.chemsep.org/

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Dehydration of Methanol to produce DiMethylEther
fsdDME_ie101583j.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Dehydration of Methanol to produce DiMethylEther by Luyben in Ind. Eng. Chem. Res. (2010) Vol. 49 pp. 12224-12241.
Source: http://www.chemsep.org/

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Natural gas separation train
fsdNG_Train_iecr52p10741.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Natural gas separation train from Luyben in Ind. Eng. Chem. Res (2013) Vol. 52 pp. 10741-10753.
Source: http://www.chemsep.org/

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Reactive distillation for producing Tert-Amyl Methyl Ether (TAME)
fsdTAME_iecr44p5715.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Reactive distillation for producing Tert-Amyl Methyl Ether (TAME) from a cracked C5-cut by Luyben in Ind. Eng. Chem. Res. (2005) Vol. 44 pp. 5715-5725.
Source: http://www.chemsep.org/

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Reactive distillation for producing Methyl Acetate from Methanol and Acetic Acid
fsdMeAce_RD_Luyben2008p148.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Estericification of Acetic Acid with Methanol to Methyl Acetate as described in Reactive Distillation Design and Control by William L. Luyben and Cheng-Ching Yu, Wiley, NY, 2006; pp. 147-164
Source: http://www.chemsep.org/

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Refinery light ends separation by means of distillation
fsdIECR52p15883_Light_Ends.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Separation of Natural Gas, W.L. Luyben, Ind.Eng.Chem.Res. Vol. 52 pp. 10741-10753
Source: http://www.chemsep.org/

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EthylBenzene production from Ethylene and Benzene
fsdAIChE57p655_EthylBenzene.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Light ends distillation EthylBenzene production from Ethylene and Benzene by Luyben in AIChE J. Vol. 57 (2011) pp. 655-670.
Source: http://www.chemsep.org/

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Dehydrogenation of 2-Butanol to Methyl Ethyl Ketone
fsdMEK_FVO2746.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Dehydrogenation of 2-Butanol to Methyl Ethyl Ketone catalyzed by In/MgO as per patent DE2831465
Source: http://www.chemsep.org/

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Hydration of Ethylene Oxide to Mono-Ethylene Glycol
fsdEG_IECR48p10840.fsd (external link) COFE, ChemSep, COUSCOUS, CORN, TEA Hydration of Ethylene Oxide to Mono-Ethylene Glycol (MEG) using an uncatalyzed reactor at 200 °C with kinetics.
Source: http://www.chemsep.org/

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Separation of Ethanol-Water Azeotrope using Benzene as Entrainer
fsdEtOH-Water_AIChEJ29p49.fsd (external link) COFE, ChemSep, COUSCOUS, TEA Heterogeneous azeotropic distillation of Ethanol and Water, inspired by the flowsheet described by G. Prokopakis and W.D. Seider in AIChE J. 29 p. 49. This separation process model is extremely sensitive to small changes in the process specifications and also to the parameters used in the thermodynamic model.
Source: http://www.chemsep.org/

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Separation of Ethanol-Water Azeotrope using Benzene as Entrainer
fsdC3MR.fsd (external link) COFE, COUSCOUS, TEA C3MR - Propane Mixed Refrigerant Cycle for Natural Gas C3MR LNG Refrigeration Cycle for Natural Gas (NG). This flowsheet was inspired by that given in the report "Modelling and optimization of the C3MR process for liquefaction of natural gas," by Dag-Erik Helgestad (December 2009).
Source: http://www.chemsep.org/

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TEALARC LNG Refrigeration Cycle for Natural Gas
fsdTEALARC.fsd (external link) COFE, COUSCOUS, TEA This flowsheet was based on one described in the report "Simulation, optimal operation and self optimisation of TEALARC LNG plant," by Emmanuel Orji Mba (December 2009).
Source: http://www.chemsep.org/

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Ethylene Cracker with high purity separation train
fsdEthylene_Cracker.fsd (external link) COFE, CORN, COUSCOUS, TEA Ethylene Cracker Ethylene Cracker with high purity separation train using UOP Multi-Downcomer trays based on the debottlenecking of the EE splitter and the PP splitter of the Port Arthur (TX) Chevron Ethylene Cracker.
Source: http://www.chemsep.org/

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