De Priester Charts Calculator Online

A DePriester Chart

De Priester Charts Calculator Online Calculator
De Priester Charts Calculator online, free
De Priester Charts Calculator Online
Depriester Chart Calculator Online

A Free Online Calculator, Quick and Easy, and Full Screen! Welcome to the Dew Point Calculator Use the sliders to explore combinations of temperature (T), relative humidity (RH), and dew point (DP) to compare the preservation quality of your environment. Knowing the dew point can help achieve long-term preservation of collection materials for libraries, museums, and archives. DePriester Charts provide an efficient method to find the vapor-liquid equilibrium ratios for different substances at different conditions of pressure and temperature. The original chart was put forth by C.L. DePriester in an article in Chemical Engineering Progress in 1953. These nomograms have two vertical coordinates, one for pressure, and another for temperature. 'K' values, representing.

De priester charts calculator online calculator

DePriester Charts provide an efficient method to find the vapor-liquid equilibrium ratios for different substances at different conditions of pressure and temperature. The original chart was put forth by C.L. DePriester in an article in Chemical Engineering Progress in 1953. These nomograms have two vertical coordinates, one for pressure, and another for temperature. 'K' values, representing the tendency of a given chemical species to partition itself preferentially between liquid and vapor phases, are plotted in between.^[1]^[2]^[3]^[4] Many DePriester charts have been printed for simple hydrocarbons.^[5]^[6]

Example[edit]

For example, to find the K value of methane at 100 psia and 60 °F.

On the left-hand vertical axis, locate and mark the point containing the pressure 100 psia.
On the right-hand vertical axis, locate and mark the point containing the temperature 60°F.
Connect the points with a straight line.
Note where the line crosses the methane axis. Read this K-value off the chart (approximately 21.3).

References[edit]

^Dambal, Ajey. 'DePriester Charts'. Thermodynamics - Chemical Engineering (Washington University).
^'Pbub and Pdew calculation based on the DePriester chart for a fast pyrolysis and hydrotreating process'(PDF). Biofuelsacademy.org.
^McKetta Jr., John J. (24 September 1992). Unit Operations Handbook: Volume 1 (In Two Volumes). CRC Press, 1992. pp. 447–448. ISBN0824786696.
^'Define and use K values, relative volatility, and x-y diagrams'. The Pillars Curriculum for Chemical Engineering.
^McKetta Jr., John J. (24 September 1992). Unit Operations Handbook: Volume 1 (In Two Volumes). CRC Press, 1992. pp. 447–448. ISBN0824786696.
^Thammasat University. 'AE 335 Charts AE + SI'(PDF).

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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. Select one of three hydrocarbons: methane, propane or -decane. Use sliders to change the pressure and temperature; a green line connects these two points. The green circle indicates where to read the -value on the chart, which is also displayed above the chart. The -values for other hydrocarbons can also be read from the chart.

Contributed by: Majed N. Aldossary(October 2016)
Additional contributions by: Rachael L. Baumann and John L. Falconer
(University of Colorado Boulder, Department of Chemical and Biological Engineering)
Open content licensed under CC BY-NC-SA

Snapshots

Details

Here is an example of how to use a DePriester chart for propane at 70 psia and 20 °F:

1. Use the sliders to set the pressure and temperature.

2. The green line connects these two points.