Binary Interaction Parameters (kij)

Description

Estimates binary interaction parameters using available correlations:

  • Nikos (PR, temperature-dependent): for N2-HC, CO2-HC, CH4-HC pairs
  • Elliot-Daubert (SRK): for N2-HC, CO2-HC, H2S-HC, C1-heavy pairs
  • Chueh-Prausnitz: from critical volumes (individual pairs)

The Kij.Matrix function generates a full N×N symmetric matrix that can be passed to Flash, BubbleP, and other calculation functions.

Spreadsheet Preview

32 rows x 6 columns

Required Functions

PO.EoS.Component.Props

Returns component properties [Tc, Pc, omega, Mw] as a row array from the database. Spills horizontally into 4 cells.

PO.EoS.Kij.Matrix

Generates N×N binary interaction parameter matrix using correlation. Methods: 'Nikos' (PR, T-dependent), 'Elliot-Daubert' (SRK), 'Chueh-Prausnitz'. Returns N×N array.

PO.EoS.Kij.ChuehPrausnitz

Estimates binary interaction parameter kij from critical volumes using Chueh-Prausnitz correlation, [-].

How to use this blueprint
  1. In Excel, go to the Petroleum Office ribbon tab and click Blueprint Manager
  2. Search for Binary Interaction Parameters
  3. Click on the blueprint to preview the spreadsheet template
  4. Click Insert to place it into your worksheet. Modify the input values to match your data.

Related Theory

C7+ Characterization

Methods for estimating critical properties, splitting heavy fractions, and lumping components for equation of state modeling

Peng-Robinson Equation of State

Theory and equations for the Peng-Robinson cubic equation of state including mixing rules, alpha functions, and volume translation

Equation of State Overview

Overview

Guide to cubic equations of state for compositional modeling, flash calculations, and phase behavior prediction

Related Blueprints

Component Database

Browse all available components and their thermodynamic properties.

Phase Envelope

Generates a phase envelope (P-T diagram boundaries) for a natural gas mixture using Peng-Robinson EoS. Returns:

PT Flash Calculation

Performs rigorous PT flash calculation for a ternary mixture (ethane, propane, n-pentane) using the property-array workflow:

Separator Test

Demonstrates array composability by chaining Flash calculations in a two-stage separator:

Fluid Model Setup

Build a fluid property table combining database components, SCN (Single Carbon Number) pseudo-components, and mixture molecular weight. This is the foundational step for all EoS calculations.

Bubble & Dew Point

Calculates bubble point and dew point (pressure and temperature) for a ternary hydrocarbon mixture using Peng-Robinson EoS.

Tags:
eoskijbinary-interactionnikoselliot-daubertchueh-prausnitz

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