Neutralization Reactor¶

DWSIM Plus

Available with a DWSIM Plus (Patreon) subscription.

Neutralization Reactor — mixes up to 6 electrolyte streams, specifies outlet T/P or runs adiabatically, and estimates the outlet pH from a charge-balance calculation on the mixed stream. Ports ───── Inlets 0..N-1 : Feed streams (acid, base, or buffer) Outlet 0 : Product (neutralized) stream

DWSIM.UnitOperations.ElectrolyteOps.NeutralizationReactorUnitOperation
Assembly DWSIM.UnitOperations.ElectrolyteOps.dll · Object ← BaseClass ← UnitOpBaseClass ← NeutralizationReactorUnitOperation

At a glance¶

Neutralization Reactor in the example flowsheet

Port	Index	Connected in the example
Inlet, material	`0`	Acid
Inlet, material	`1`	Caustic
Inlet, energy	`2`
Outlet, material	`0`	Neutralized

Example¶

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

Python

fs = (Flowsheet.Create("NeutralizationExample")
      .WithCompounds("Water", "Hydronium", "Chloride (ion)", "Sodium (ion)", "Hydroxide")
      .WithPropertyPackage(PropertyPackages.Plus.ElectrolyteNRTL))

# Acid: 0.10 mol/L HCl, 10 kg/s. Caustic: 0.95 mol/s of NaOH in 5 kg/s of water
acid = (fs.AddMaterialStream("Acid").At(Q.Celsius(25.0), Q.Bar(2.0))
        .SetCompoundMolarFlow("Water", 10.0 / 0.018015)
        .SetCompoundMolarFlow("Hydronium", 1.0)
        .SetCompoundMolarFlow("Chloride (ion)", 1.0))
caustic = (fs.AddMaterialStream("Caustic").At(Q.Celsius(25.0), Q.Bar(2.0))
           .SetCompoundMolarFlow("Water", 5.0 / 0.018015)
           .SetCompoundMolarFlow("Sodium (ion)", 0.95)
           .SetCompoundMolarFlow("Hydroxide", 0.95))
product = fs.AddMaterialStream("Neutralized")

nr = (fs.AddNeutralizationReactor("NR-1")
      .WithThermalMode(NeutralizationThermalMode.Isothermal)
      .WithOutletTemperature(Q.Celsius(25.0))
      .ConnectFeed(acid, 0).ConnectFeed(caustic, 1)
      .ConnectProduct(product, 0))

fs.AutoLayout()
fs.Solve()

r = nr.Object.Results
print(f"Neutralized      = {r.NeutralizedMolarFlow:.3f} mol/s of H3O+ and OH-")
print(f"Estimated pH     = {r.EstimatedPH:.2f}")
print(f"Outlet           = {r.OutletMassFlow:.3f} kg/s at {r.OutletTemperature - 273.15:.1f} C")
print(f"Heat duty        = {r.HeatDuty / 1000.0:.1f} kW (negative: heat removed)")

Output

Neutralized      = 0.950 mol/s of H3O+ and OH-
Estimated pH     = 2.48
Outlet           = 15.093 kg/s at 25.0 C
Heat duty        = -53.0 kW (negative: heat removed)

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	Unit (SI)	Input
`Thermal Mode`		yes
`Outlet Temperature`	K	yes
`Use Inlet Pressure`		yes
`Fixed Pressure`	Pa	yes
`Number of Inlets`		yes
`Calculated Outlet Temperature`	K	result
`Outlet Pressure`	Pa	result
`Outlet Molar Flow`	mol/s	result
`Outlet Mass Flow`	kg/s	result
`Estimated pH`		result
`Neutralized Molar Flow`	mol/s	result
`Net Charge Excess`	meq/L	result
`Heat Duty`	kW	result
`Active Inlets`		result

Learn more¶

FluentAPI
- Electrolyte.NeutralizationReactorBuilder

API members¶

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

Constructors¶

NeutralizationReactorUnitOperation()

C#VB.NET

public NeutralizationReactorUnitOperation()

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 input configuration: thermal mode, outlet temperature, outlet pressure specification and the number...

Gets or sets the input configuration: thermal mode, outlet temperature, outlet pressure specification and the number of feed inlets.

C#VB.NET

public NeutralizationReactorConfig Config { get; set; }

Public Property Config As NeutralizationReactorConfig

IsPremium: Gets a value indicating that this unit operation is listed in the Premium group of the object palette (always true).

Gets a value indicating that this unit operation is listed in the Premium group of the object palette (always true).

C#VB.NET

public bool IsPremium { get; }

Public ReadOnly Property IsPremium As Boolean

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

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 (reactors).

Gets the simulation object class category (reactors).

C#VB.NET

public override SimulationObjectClass ObjectClass { get; }

Public Overrides Property ObjectClass As SimulationObjectClass

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

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

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: one feed inlet per configured inlet on the left, a duty...

Creates the graphic connector definitions on the flowsheet: one feed inlet per configured inlet on the left, a duty (energy) inlet at the bottom placed last in the inlet list, and one product outlet on the right.

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 on the given SkiaSharp canvas: the embedded photo in photorealistic mode (draw mode 2)...

Draws the unit operation on the given SkiaSharp canvas: the embedded photo in photorealistic mode (draw mode 2), otherwise the vector icon.

Parameter	Type	Description
`g`	`Object`	The SkiaSharp canvas.

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.

Returns the raw bytes of the icon image for this unit operation.

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.

Restores the unit operation. The Config element, when present, is loaded into the existing Config; files saved without it keep the default configuration.

Parameter	Type	Description
`data`	`List<XElement>`	The XML elements written by `SaveData`.

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.

Populates the cross-platform (Avalonia) editor panel with controls.

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.

C#VB.NET

public object ReturnInstance(string typename)

Public Function ReturnInstance(typename As String) As Object

SaveData(): Serializes the unit operation, with its Config written as a Config element.

Serializes the unit operation, with its Config written as a Config element.

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()