Amine Treater

DWSIM Plus

Available with a DWSIM Plus (Patreon) subscription.

Shortcut Amine Treater. One sour-gas feed → two outlets (sweet gas, acid gas). H₂S and CO₂ (if present as compounds) are partitioned by the configured removal fractions; hydrocarbons mostly pass to the sweet side, with a small mass slip to the acid gas. Any sulfur carried on WtPctSulfur ExtraProperties is treated as H₂S-equivalent and routed to the acid gas outlet.

DWSIM.UnitOperations.Refining.Amine.AmineUnitOperation
Assembly DWSIM.UnitOperations.Refining.dll · Object ← BaseClass ← UnitOpBaseClass ← AmineUnitOperation

At a glance

Port	Index	Connected in the example
Inlet, material	0	Sour-gas
Outlet, material	0	Sweet-gas
Outlet, material	1	Acid-gas

Example

This code runs on every build of this site, and the output below is what it printed.

Python

fs = (Flowsheet.Create("AmineExample")
      .WithCompounds("Methane", "Ethane", "Propane", "Carbon dioxide", "Hydrogen sulfide")
      .WithPropertyPackage(PropertyPackages.PengRobinson))

# Sour gas, 1000 kmol/h: 85 % methane, 6 % ethane, 3 % propane, 4 % CO2, 2 % H2S
kmolh = {"Methane": 850.0, "Ethane": 60.0, "Propane": 30.0,
         "Carbon dioxide": 40.0, "Hydrogen sulfide": 20.0}
sour = fs.AddMaterialStream("Sour-gas").At(Q.Celsius(40.0), Q.Bar(60.0))
for name, flow in kmolh.items():
    sour.SetCompoundMolarFlow(name, flow / 3.6)    # mol/s
sweet = fs.AddMaterialStream("Sweet-gas")
acid = fs.AddMaterialStream("Acid-gas")

amine = (fs.AddAmineTreater("AMN-1")
         .WithH2SRemoval(0.9995)
         .WithCO2Removal(0.50)
         .WithHydrocarbonSlip(0.001)
         .WithOperatingPressure(Q.Bar(1.8))      # acid gas leaves the regenerator at this pressure
         .WithAmineCirculationLPerMolH2S(15.0)
         .ConnectFeed(sour, 0)
         .ConnectProduct(sweet, 0).ConnectProduct(acid, 1))

fs.AutoLayout()
fs.Solve()

r = amine.Object.Results
print(f"H2S in sweet gas   = {sweet.OverallMoleFraction('Hydrogen sulfide') * 1e6:.0f} ppmv")
print(f"CO2 in sweet gas   = {sweet.OverallMoleFraction('Carbon dioxide') * 100.0:.2f} mol%")
print(f"H2S in acid gas    = {acid.OverallMoleFraction('Hydrogen sulfide') * 100.0:.1f} mol%")
print(f"H2S removed        = {r.H2SRemovedKgPerS * 3600.0:.0f} kg/h")
print(f"Amine circulation  = {r.AmineCirculationLPerS * 3.6:.0f} m3/h")

Output

H2S in sweet gas   = 10 ppmv
CO2 in sweet gas   = 2.09 mol%
H2S in acid gas    = 48.8 mol%
H2S removed        = 681 kg/h
Amine circulation  = 300 m3/h

DWSIM 10.2.11.0, generated 2026-10-08.

Properties

IDs accepted by GetPropertyValue, SetPropertyValue, the sensitivity analysis, the optimizer, the Adjust block and dynamic events. Units are SI; pass another unit system to GetPropertyValue to get them converted.

ID	Name	Unit (SI)	Input
Operating Temperature		K	yes
Operating Pressure		Pa	yes
H2S Removal Fraction		NF	yes
CO2 Removal Fraction		NF	yes
Feed Mass Flow		kg/s	result
Sweet Gas Mass Flow		kg/s	result
Acid Gas Mass Flow		kg/s	result
H2S Removed		kg/s	result
CO2 Removed		kg/s	result

Learn more

• User guide

  ---

  • Amine Treater

• FluentAPI

  ---

  • Refining.AmineTreaterBuilder

API members

Public members declared by this class. Inherited members are documented on the base classes.

Constructors

AmineUnitOperation()

C#VB.NET

public AmineUnitOperation()

Public Sub New()

Properties

ComponentDescription: Gets or sets the CAPE-OPEN component description for this unit operation.

Gets or sets the CAPE-OPEN component description for this unit operation.

C#VB.NET

public override string ComponentDescription { get; set; }

Public Overrides Property ComponentDescription As String

Config: Gets or sets the configuration of this amine treater: the operating temperature and pressure, H2S and CO2 removal...

Gets or sets the configuration of this amine treater: the operating temperature and pressure, H2S and CO2 removal fractions, hydrocarbon slip fraction, amine circulation per mole of H2S, and the names of the H2S and CO2 compounds.

C#VB.NET

public AmineConfiguration Config { get; set; }

Public Property Config As AmineConfiguration

IsRefining: Gets a value indicating that this unit operation belongs to the refining group.

Gets a value indicating that this unit operation belongs to the refining group. Always true; the object palette uses it to list the unit under the Refinery category.

C#VB.NET

public bool IsRefining { get; }

Public ReadOnly Property IsRefining As Boolean

MobileCompatible: Gets a value indicating whether this unit operation is compatible with mobile interfaces.

Gets a value indicating whether this unit operation is compatible with mobile interfaces. Always false.

C#VB.NET

public override bool MobileCompatible { get; }

Public Overrides ReadOnly Property MobileCompatible As Boolean

ObjectClass: Gets the simulation object class category (Columns).

Gets the simulation object class category (Columns).

C#VB.NET

public override SimulationObjectClass ObjectClass { get; }

Public Overrides Property ObjectClass As SimulationObjectClass

Prefix: Gets the default name prefix for this unit operation ('AMT-').

Gets the default name prefix for this unit operation ("AMT-").

C#VB.NET

public string Prefix { get; }

Public ReadOnly Property Prefix As String

Methods

Calculate(object): Calculates the object.

Calculates the object.

Parameter	Type	Description
args	Object

C#VB.NET

public override void Calculate(object args = null)

Public Overrides Sub Calculate(args As Object = Nothing)

CloneXML(): Creates a deep copy of this object by round-tripping through XML serialization.

Creates a deep copy of this object by round-tripping through XML serialization.

C#VB.NET

public override object CloneXML()

Public Overrides Function CloneXML() As Object

CloseEditForm(): Closes the editor of this object, if it is open.

Closes the editor of this object, if it is open.

C#VB.NET

public override void CloseEditForm()

Public Overrides Sub CloseEditForm()

CreateConnectors(): Creates the graphic connector definitions on the flowsheet: a Sour Gas inlet on the left and two outlets on the...

Creates the graphic connector definitions on the flowsheet: a Sour Gas inlet on the left and two outlets on the right (Sweet Gas at the top, Acid Gas at the bottom).

C#VB.NET

public void CreateConnectors()

Public Sub CreateConnectors()

DeCalculate(): Decalculates the object.

Decalculates the object.

C#VB.NET

public override void DeCalculate()

Public Overrides Sub DeCalculate()

DisplayEditForm(): Opens the editor of this object.

Opens the editor of this object. A host that has no editor for it does nothing.

C#VB.NET

public override void DisplayEditForm()

Public Overrides Sub DisplayEditForm()

Draw(object): Draws the unit operation icon on the given SkiaSharp canvas.

Draws the unit operation icon on the given SkiaSharp canvas. Draw mode 2 uses the embedded PNG image (falling back to the vector icon if it cannot be loaded), draw mode 1 draws the vector icon as a silhouette, and other modes draw the vector icon.

Parameter	Type	Description
g	Object	The SkiaSharp canvas (SKCanvas).

C#VB.NET

public void Draw(object g)

Public Sub Draw(g As Object)

GetDisplayDescription(): Returns the description string for this unit operation type.

Returns the description string for this unit operation type.

C#VB.NET

public override string GetDisplayDescription()

Public Overrides Function GetDisplayDescription() As String

GetDisplayName(): Returns the display name for this unit operation type.

Returns the display name for this unit operation type.

C#VB.NET

public override string GetDisplayName()

Public Overrides Function GetDisplayName() As String

GetIconBitmapBytes(): Returns the raw bytes of the icon image for this unit operation, rendered from the vector icon at 64 x 64 pixels.

Returns the raw bytes of the icon image for this unit operation, rendered from the vector icon at 64 x 64 pixels.

C#VB.NET

public override byte[] GetIconBitmapBytes()

Public Overrides Function GetIconBitmapBytes() As Byte()

GetPreferredGraphicObjectHeight(): Returns the preferred height of the flowsheet graphic object, in pixels.

Returns the preferred height of the flowsheet graphic object, in pixels.

C#VB.NET

public override double GetPreferredGraphicObjectHeight()

Public Overrides Function GetPreferredGraphicObjectHeight() As Double

GetPreferredGraphicObjectWidth(): Returns the preferred width of the flowsheet graphic object, in pixels.

Returns the preferred width of the flowsheet graphic object, in pixels.

C#VB.NET

public override double GetPreferredGraphicObjectWidth()

Public Overrides Function GetPreferredGraphicObjectWidth() As Double

GetProperties(PropertyType): Get a list of all properties of the object.

Get a list of all properties of the object.

Parameter	Type	Description
proptype	PropertyType	Type of the property.

C#VB.NET

public override string[] GetProperties(PropertyType proptype)

Public Overrides Function GetProperties(proptype As PropertyType) As String()

GetPropertyUnit(string, IUnitsOfMeasure): Gets the units of a property.

Gets the units of a property.

Parameter	Type	Description
prop	String	Property identifier.
su	IUnitsOfMeasure	Units system to use. Null to use the default (SI) system.

C#VB.NET

public override string GetPropertyUnit(string prop, IUnitsOfMeasure su)

Public Overrides Function GetPropertyUnit(prop As String, su As IUnitsOfMeasure) As String

GetPropertyValue(string, IUnitsOfMeasure): Returns the value of a named property, converting from SI to the current unit system.

Returns the value of a named property, converting from SI to the current unit system. Falls back to extra properties if the property is not found in the base implementation.

Parameter	Type	Description
prop	String	The property identifier string.
su	IUnitsOfMeasure	Optional units-of-measure system used for conversion; uses the shared SI system when Nothing.

C#VB.NET

public override object GetPropertyValue(string prop, IUnitsOfMeasure su)

Public Overrides Function GetPropertyValue(prop As String, su As IUnitsOfMeasure) As Object

LoadData(List<XElement>): Restores the unit operation state from a list of XML elements previously produced by SaveData.

Restores the unit operation state from a list of XML elements previously produced by SaveData.

Parameter	Type	Description
data	List<XElement>	The list of XElement objects containing serialized state.

C#VB.NET

public override bool LoadData(List<XElement> data)

Public Overrides Function LoadData(data As List(Of XElement)) As Boolean

PopulateEditorPanel(object): Populates the cross-platform (Avalonia) editor panel with controls: buttons that open the configuration and results...

Populates the cross-platform (Avalonia) editor panel with controls: buttons that open the configuration and results forms. Other container types are ignored.

Parameter	Type	Description
ctner	Object	The editor panel (layout container) to populate.

C#VB.NET

public void PopulateEditorPanel(object ctner)

Public Sub PopulateEditorPanel(ctner As Object)

ReturnInstance(string): Creates and returns a new instance for deserialization.

Creates and returns a new instance for deserialization.

Parameter	Type	Description
typename	String	The type name to instantiate (not used).

C#VB.NET

public object ReturnInstance(string typename)

Public Function ReturnInstance(typename As String) As Object

SaveData(): Serializes the unit operation state to a list of XML elements for persistence.

Serializes the unit operation state to a list of XML elements for persistence.

C#VB.NET

public override List<XElement> SaveData()

Public Overrides Function SaveData() As List(Of XElement)

SetPropertyValue(string, object, IUnitsOfMeasure): Sets the value of a property.

Sets the value of a property.

Parameter	Type	Description
prop	String	Property identifier.
propval	Object	Property value to set at the specified units.
su	IUnitsOfMeasure	Units system to use. Null to use the default (SI) system.

C#VB.NET

public override bool SetPropertyValue(string prop, object propval, IUnitsOfMeasure su)

Public Overrides Function SetPropertyValue(prop As String, propval As Object, su As IUnitsOfMeasure) As Boolean

UpdateEditForm(): Redraws the editor of this object with the current values, if it is open.

Redraws the editor of this object with the current values, if it is open.

C#VB.NET

public override void UpdateEditForm()

Public Overrides Sub UpdateEditForm()

Fields

_editorForm: The classic (WinForms) editor window open for this unit operation, if any.

The classic (WinForms) editor window open for this unit operation, if any. Not saved with the flowsheet.

C#VB.NET

public FormEditorAmine _editorForm

Public _editorForm As FormEditorAmine