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PHASE EQUILIBRIA
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PHASE EQUILIBRIA. Ternary Systems. Types: (Liquid –Vapor) ternary systems (Liquid – Solid ) ternary systems. Section 12. Today’s Topic : The Three component system , L-V type Degree of freedom analysis How to determine compositions ? The phase diagram Isothermal section - PowerPoint PPT Presentation

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PHASE EQUILIBRIATernary SystemsTypes:(Liquid Vapor) ternary systems(Liquid Solid ) ternary systems

Section 12Todays Topic :The Three component system , L-V typeDegree of freedom analysisHow to determine compositions ?The phase diagramIsothermal sectionDew and bubble point calculations

Ternary SystemsApplications of ternary systems:Steel IndustryRefractoriesCeramicsDistillationLiquid - Liquid ExtractionLeachingTea !!!

Ternary SystemsDegree of Freedom Analysis:F = C P + 2 r = 3 P + 2 -1 [ Isobaric diagrams]F = 4 - PTernary SystemsDegree of Freedom Analysis:Fmax = 3 These 3 independent variables are : T , x1 , x2Three component systemMethod of representation :Use the Composition triangle

Three component system

Three component system

1 Any vertex represent a one component system.Three component system2 Any side represent a two component system

Three component system3 Any point inside the triangle represent a ternary system

4 Any parallel line to a side of the triangle , represents a locus of constant percentage of the third component

12In this figure: We have a line parallel to the side BC Then , it contains a fixed percentage of A ( 30% ) This line is a locus for all of the mixtures containing 30 % A

13In this figure: We have a line parallel to the side AB Then , it contains a fixed percentage of C ( 30% ) This line is a locus for all of the mixtures containing 30 % C

14Three component system5 Any point inside the triangle can be located knowing two compositions only.

Locate the mixture of the following composition : 30% A & 50 % B

16Locate the mixture of the following composition : 30% A & 50 % B

17Locate the mixture of the following composition : 30% A & 50 % B

18Liquid Vapor Equilibrium in Ternary systemsThe Binary Diagram :Assumptions:Total liquid solubilityIdeal system

Liquid Vapor Equilibrium in Ternary systemsThe Binary Diagram :Assumptions:Total liquid solubilityIdeal system

Liquid Vapor Equilibrium in Ternary systems

Liquid Vapor Equilibrium in Ternary systems

Liquid Vapor Equilibrium in Ternary systemsComparing binary and ternary diagram:Vaporous curve vs Vaporous SurfaceLiquidus line vs Vaporous SurfaceLiquid Vapor Equilibrium in Ternary systems

Vaporous Surface

Liquid Vapor Equilibrium in Ternary systems

Liquid Vapor Equilibrium in Ternary systems

Liquid Vapor Equilibrium in Ternary systems

Liquid Vapor Equilibrium in Ternary systemsComparing binary and ternary diagram: 1.Phases got on cooling :VL+VL

Liquid Vapor Equilibrium in Ternary systems

Liquid Vapor Equilibrium in Ternary systemsComparing binary and ternary diagram: 1.Phases got on cooling :VL+VL

Comparing binary and ternary diagrams:2.Method to get composition and amounts:In binary system :Draw a tie line then use lever arm principleIn Ternary system:The first step is to draw the ISOTHERMAL SECTION

VLL + V

VLL + V

LVL +VLiquid Vapor Equilibrium in Ternary systemsHow to draw a tie line :Lever Arm Principle: