1. ASPEN PLUS Chao Miao 04.25.2013

2. I NTRODUCTION  In industry complicated problems are often not solved by hand for two reasons: Human error and time constraints.  Aspen can be a very powerful tool for a Chemical Engineer in a variety of fields oil and gas production, refining, chemical processing, environmental studies, power generation

3. I NTRODUCTION Aspen Tech was born out a joint research project between the MIT and DOE—an Advanced System for Process Engineering (ASPEN) Project. Aspen Plus is a process modeling tool for conceptual design, optimization, and performance monitoring for chemical processes. Aspen Plus is a core element of AspenTech’s Process Engineering applications. Some other tools offered by Aspen One: Dynamic Simulation, Heat exchanger design, Production planning, interface with Microsoft excel (Workbook).

4. I NTRODUCTION A process model can be defined as an engineering system's "blue print.” The process model is a complete layout of the engineering system including the following: 1. Flowsheet The flowsheet shows one or more inlet streams entering into the system and continues through the process, illustrating all intermediate unit operations and the interconnecting streams. The flowsheet also indicates all product streams. Each stream and unit operation is labeled and identified. 2. Chemical Components all chemical components from the necessary reactants and products, to steam and cooling water. 3. Operating Conditions All unit operations in the process model are kept under particular operating conditions (i.e., temperature, pressure, size).

5. T HE S TRUCTURE OF A P ROCESS S IMULATOR Component Database Thermodynamic Model Solver Flowsheet Builder Unit Operation Block Solver Data Output Generator Flowsheet Solver Basic Computational Elements in Process Simulator Select Chemical Components Select Thermodynamic Model Input Topology of Flowsheet Select Units and Select Feed stream properties Select Equipment Parameters Select Output Display Options Sequence of Input Steps for a Simulation Problem Select Convergence Criteria and Run Simulation Turton, Bailie, Whiting, Shaeiwitz, “Analysis, Synthesis, and Design of Chemical Processes”, Second Edition, 2003

6. I NTRODUCTION To solve this problem, we need: Material balances Energy balances What is the composition of stream PRODUCT?

7. G ETTING S TARTED

9. A SPEN A CCESS

10. N AVIGATING THE A SPEN WINDOWS Toolbar Feature Equipment Model Library Stream Library Status BarSimulation Status Next Button

11. S TATUS I NDICATOR

12. S ET UP Most of the commonly used Setup information is entered on the Setup Specifications Global sheet: Flowsheet title to be used on reports Run type Input and output units Valid phases (e.g. vapor-liquid or vapor-liquid-liquid) Ambient pressure Stream report options are located on the Setup Report Options Stream sheet.

13. S ET UP S PECIFICATIONS FORMS

14. C OMPONENTS Use the Components Specifications form to specify all the components required for the simulation. If available, physical property parameters for each component are retrieved from databanks. Pure component databanks contain parameters such as molecular weight, critical properties, etc. The databank search order is specified on the Databanks sheet. The Find button can be used to search for components.

15. C OMPONENTS

16. E NTERING C OMPONENTS The Component ID is used to identify the component in simulation inputs and results. Each Component ID can be associated with a databank component as either:  Formula: Chemical formula of component (e.g., C6H6)  Component Name: Full name of component (e.g.,BENZENE) Databank components can be searched for using the Find button.  Search using component name, formula, component class, molecular weight, boiling point, or CAS number.  All components containing specified items will be listed.

17. F IND

18. P URE C OMPONENT D ATABANKS

19. P ROPERTIES Use the Properties Specifications form to specify the physical property methods to be used in the simulation. Property methods are a collection of models and methods used to describe pure component and mixture behavior. Choosing the right physical properties is critical for obtaining reliable simulation results. Selecting a Process Type will narrow the number of methods available.

20. P ROPERTIES S PECIFICATIONS F ORM

21. S TREAMS Use Stream Input forms to specify the feed stream conditions and composition. To specify stream conditions enter two of the following: 1. Temperature 2. Pressure 3. Vapor Fraction To specify stream composition enter either: 1. Total stream flow and component fractions 2. Individual component flows

22. S TREAMS I NPUT F ORM

23. B LOCKS Each Block Input or Block Setup form specifies operating conditions and equipment specifications for the unit operation model. Some unit operation models require additional specification forms All unit operation models have optional information forms (e.g. BlockOptions form).

24. B LOCK F ORM

25. S TART THE RUN  Select Control Panel from the View menu or press the Next button to be prompted.  The simulation can be executed when all required forms are complete.  The Next button will take you to any incomplete forms.

26. R EVIEWING R ESULTS History file or Control Panel Messages  Contains any generated errors or warnings  Select History or Control Panel on the View menu to display the History file or the Control Panel Stream Results  Contains stream conditions and compositions  For all streams (/Data/Results Summary/Streams)  For individual streams (bring up the stream folder in the Data Browser and select the Results form) Block Results  Contains calculated block operating conditions ( bring up the block folder in the Data Browser and select the Results form)

27. U NIT O PERATION M ODEL T YPE Mixers/Splitters Separators Heat Exchangers Columns Reactors Pressure Changers Manipulators Solids User Models

28. S EPARATORS

29. P ROBLEM D ESCRIPTION Perform a Flash Calculation for the following stream: Molar Composition: Ethane: 40% Propane: 40% n-Butane: 20% Pressure: 15 bar Temperature: 25 Celsius Flow: 100 kmol/hr

30. C REATING A FLASH PROCESS  To place a unit operation (or piece of equipment) into the flowsheet window, select it from the Equipment Model Library and then click on the flowsheet window where you would like the piece of equipment to appear. Required Stream Optional Stream

31. C REATING A FLASH PROCESS  Streams can be added by clicking on the process flowsheet where you would like the stream to begin and clicking again where you would like the stream to end

32. S OME A SPEN F EATURES Color Code: - Red: Information is required / simulation has finished with errors - Blue: Everything is ok. - Yellow: Input Information has changed / simulation has finished with warnings. Next Button: Displays the next required input specification Next Button

33. S ET UP

34. S PECIFICATION OF C HEMICAL C OMPONENTS

35. S ELECTION OF P HYSICAL P ROPERTY M ODEL Peng Robinson: This property method is comparable to the RK-SOAVE property method. It is recommended for gas-processing, refinery, and petrochemical applications. Sample applications include gas plants, crude towers, and ethylene plants.

36. S ELECTION OF F EED STREAM P ROPERTIES

37. S ELECTION OF E QUIPMENT P ARAMETERS Pressure = 0 means no pressure drop through the equipment. Heat Duty = 0 means no Heat is added to the equipment.

38. R UNNING

39. V ERIFY YOUR RESULTS

41. R EACTORS

43. P ROBLEM D ESCRIPTION Aspen Plus will be used with benzene pyrolysis reaction in a plug flow reactor

44. R EACTION KINETICS

45. E XPERIMENT DATA

46. P ARAMETER V ALUES

47. F LOWSHEET

51. S ET UP I NPUT FORM

53. C OMPONENT I NPUT

55. P ROPERTY I NPUT FORM

56. S TREAM I NPUT FORM

57. R EACTOR I NPUT FORM

58. P HYSICAL DIMENSION OF REACTION

59. I NFORMATION FOR REACTIONS

61. R EACTIONS I NPUT F ORM

65. R EACTIONS K INETICS I NPUT F ORM

69. R UNNING

70. R ESULTS Experiment data Simulation data

72. P ROBLEM DESCRIPTION The feed shown in the diagram above will consist of 50 lbmol/hr of Methanol and 50 lbmol/hr of water. A purity of 95% is desired in both the bottoms and distillate product streams using a reflux ratio of 1.5.

73. F LOWSHEET

76. S ETUP

77. C OMPONENT

78. P ROPERTIES

79. S TREAMS

80. D ISTILLATOR

83. R UNNING

84. R ESULTS

85. Thank you