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词条 DePriester chart
释义

  1. Example

  2. References

{{Orphan|date=December 2018}}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

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

  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

1. ^{{cite web|last1=Dambal|first1=Ajey|title=DePriester Charts|url=http://classes.engineering.wustl.edu/thermo/dep_ch.htm|website=Thermodynamics - Chemical Engineering (Washington University)}}
2. ^{{cite web|title=Pbub and Pdew calculation based on the DePriester chart for a fast pyrolysis and hydrotreating process|url=http://biofuelsacademy.org/WordPress/wp-content/uploads/2015/02/Pbub-and-Pdew-calculation-based-on-the-DePriester-chart-for-a-fast-pyrolysis-and-hydrotreating-process.pdf|website=Biofuelsacademy.org}}
3. ^{{cite book|last1=McKetta Jr.|first1=John J.|title=Unit Operations Handbook: Volume 1 (In Two Volumes)|publisher=CRC Press, 1992|isbn=0824786696|pages=447–448|url=https://books.google.com/books?id=Dt42cXRgIB8C&pg=PA448&lpg=PA448&dq=depriester+chart&source=bl&ots=Izt0Lss8Bt&sig=icKTrwuEBvi3ctvi3GbgMtqEhnw&hl=en&sa=X&ved=0ahUKEwih8Yfp0bHJAhVL6mMKHePxBY84ChDoAQgxMAQ#v=onepage&q=depriester%20chart&f=false}}
4. ^{{cite web|title=Define and use K values, relative volatility, and x-y diagrams|url=http://pillars.che.pitt.edu/student/slide.cgi?course_id=12&slide_id=72.0|website=The Pillars Curriculum for Chemical Engineering}}
5. ^{{cite book|last1=McKetta Jr.|title=Unit Operations Handbook: Volume 1 (In Two Volumes)|first1=John J.|publisher=CRC Press, 1992|isbn=0824786696|pages=447–448|url=https://books.google.com/books?id=Dt42cXRgIB8C&pg=PA448&lpg=PA448&dq=depriester+chart&source=bl&ots=Izt0Lss8Bt&sig=icKTrwuEBvi3ctvi3GbgMtqEhnw&hl=en&sa=X&ved=0ahUKEwih8Yfp0bHJAhVL6mMKHePxBY84ChDoAQgxMAQ#v=onepage&q=depriester%20chart&f=false}}
6. ^{{cite web|last1=Thammasat University|title=AE 335 Charts AE + SI|url=http://prodpran.che.engr.tu.ac.th/AE335/02%20K%20Charts--AE+SI.pdf}}

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