Extended to the more general determination of the de-grees of freedom (number of allowable speci–cations) for a ⁄ow system, including consideration of extensive vari-ables. The intensive and extensive variables are related by material and energy balance equations together with phase equilibrium data in the form of equations, tables,. DePriester Charts present an efficient method in finding the equilibirum ratios for different substances at different conditions of pressure and temperature. These nomograms have a co-ordinate each of pressure and temperature and have ' K ' values ingeniously plotted in between.

1. De Priester Charts Calculator Online Calculator
2. De Priester Charts Calculator online, free
3. De Priester Charts Calculator Online

De Priester Charts Calculator Online Calculator

• 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. The green line connects these two points. The K-value is where the green line intersects the curve for propane (K = 0.8).
• Initial Conditions. Temperature: K Pressure: kPaa Mixture. Select the components for your mixture from the lists below and enter the mole fraction of each component in the field to the right.
• Use the keto calculator to calculate the amount of macronutrients you need per day on a ketogenic diet.

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.

De Priester Charts Calculator online, free

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

References[edit]

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

De Priester Charts Calculator Online