Depriester chart and k values how to#
Depriester chart and k values pdf#
Depriester chart and k values series#

Read this K-value off the chart (approximately 21.3).

Note where the line crosses the methane axis.Connect the points with a straight line.On the right-hand vertical axis, locate and mark the point containing the temperature 60вЏ.pressure and temperature that are valid up to around 6000 psi pressures or more. On the left-hand vertical axis, locate and mark the point containing the pressure 100 psia. DePriester (DePriester, 1953) presented K-value charts for light hydrocarbons vs.Example ДЇor example, to find the K value of methane at 100 psia and 60В вЏ. Many DePriester charts have been printed for simple hydrocarbons. 'K' values, representing the tendency of a given chemical species to partition itself preferentially between liquid and vapor phases, are plotted in between. These nomograms have two vertical coordinates, one for pressure, and another for temperature. DePriester in an article in Chemical Engineering Progress in 1953. Abbott, Introduction to Chemical Engineering Thermodynamics, 7th ed., Boston: McGraw-Hill, 2005.DePriester Charts provide an efficient method to find the vapor-liquid equilibrium ratios for different substances at different conditions of pressure and temperature. The -value is where the green line intersects the curve for propane (). The green line connects these two points.

Use the sliders to set the pressure and temperature.

Depriester chart and k values how to#

Here is an example of how to use a DePriester chart for propane at 70 psia and 20 вЏ: 1. The -values for other hydrocarbons can also be read from the chart. The green circle indicates where to read the -value on the chart, which is also displayed above the chart. Use sliders to change the pressure and temperature a green line connects these two points. Select one of three hydrocarbons: methane, propane or -decane.

Depriester chart and k values series#

This Demonstration applies a DePriester chart, a set of nomograms to find the vapor-liquid equilibrium ratio (the gas phase mole fraction divided by the liquid phase mole fraction, known as the -value) for a series of hydrocarbons.

Depriester chart and k values pdf#

The Pillars Curriculum for Chemical EngineeringДepriester chart for hydrocarbons pdf DePriester Chart for Hydrocarbons - LearnChemE - Educational Resources for Engineering Courses.

PPT - CBE 417 вЂњUnit OperationsвЂќ PowerPoint Presentation, free download - ID:2091901.

Depriester chart Thermodynamics - Physical meaning of some earned values using DePriester Chart - Engineering Stack Exchange You can represent K as $K_i = rac$ for an ideal mixture using Raoult's law. = psi sum of y/kДo the values for the pressures above and below the dew point pressure have a physical meaning? For example, showing us that we are in two-phase, SH vapor or SC liquid region? Or are they just showing there isn't VLE with that given property? idkfa 1, 664 1 gold badge 7 silver badges 19 bronze badges My question is about those values, are they showing some physical property? If I wanted to calculate the dew point pressure at a given temperature and I take arbitrary pressures (including the dew point pressure) I get the following results. Now there are sometimes that we get some K's and using the summation of $y/k$ we get some quantities that are not 1, like 0. Using DePriester Chart and Given one of mole fractions ($z$), pressure and temperature we can acquire K-values for that properties and bubble and dew properties.

DePriester Chart for Hydrocarbons - LearnChemE - Educational Resources for Engineering Courses.

Thermodynamics - Physical meaning of some earned values using DePriester Chart - Engineering Stack Exchange.