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  1. stevethermo

    Simulation Thermocompressor in ASPEN HYSIS

    There are some good links here... http://www.physicsforums.com/showthread.php?t=180713 They point out a link to a chart from an older Perry's handbook: http://bruceeng.com/thermocompressor%20design%20equation.bmp And an article with equations (lots of them)...
  2. stevethermo

    Simulation Thermocompressor in ASPEN HYSIS

    There is nothing in HYSYS that could do that. This is a kinetic energy problem, and would take something more sophisticated. Perhaps there are some methods in the literature, but you may be ahead to contact a vendor, to see if they have a simple way to estimate whether or not this may be...
  3. stevethermo

    H2S emission rate

    This is not a straight forward calculation. Even to get a rough number will take some engineering judgement. You will need to have information on the H2S composition in the gas. If that is available, the next issue is the flow rate from the tank. The flow rate leaving the tank is largely...
  4. stevethermo

    Thermoflex and Gatecycle

    Thermoflow sent me a one month trial version a year or two ago, for one of their other products. I found the software very easy to use. A request for the trial version can be made from their web page: http://www.thermoflow.com/ Good Luck
  5. stevethermo

    Supercritical CO2 properties versus P & T

    Just checking the NIST site...it looks like NIST has expanded the coverage of their database significantly, to about 70+ light gases, hydrocarbons up to C10, and refrigerants. Besides CO2, there is methanol, ammonia and others. Here is the link for completeness...
  6. stevethermo

    Bulk Temperature of Diluted Caustic at Mixing Point

    As you may remember from a lab class, if doing the mixing in a batch process, such as in a tank, add the water first, then add the caustic, while mixing vigorously, and you shouldn't have a problem. Cold water is better. An Enthalpy chart for aqueous solutions, such as the one in the Oxy...
  7. stevethermo

    Conductivity versus concentration of acetic acid - water solutions

    There are some values in my older (1985) version of the CRC Handbook, in the table "Concentrative Properties of Aqueous Solutions." Best of Luck
  8. stevethermo

    VLE for acetone-methanol and water

    The DECHEMA books have regressed parameters for the binary systems. These books are a major source for parameters included in the databanks of most process simulators. Another source of data is the Korea Thermophysical Properties Databank, KDB, which is located on the web at...
  9. stevethermo

    Mercaptan level to get negative on Doctor Test

    Does anyone have an idea of how low the mercaptan level needs to be to get a negative (sweet) on the ASTM D-4952 Doctor Test? Some fuel specs state 20 ppm S as mercaptan or to pass a Doctor Test. My expectation is that the Doctor Test is more stringent. (In this case I am assuming there is no...
  10. stevethermo

    Pour Point Blending or Cold Flow Property Blending

    Would anyone be able to share some information on the cold-flow-property blending methods, in particular the pour point blending method, that uses the pour point index? I am looking for an estimation method that was developed by Chevron. It seems to have been picked up in the Crude Assay...
  11. stevethermo

    Properties of combined fluids?

    The CRC Handbook has tables of density and viscosity at 25 C of NaCl/water, and HCl/water. These show viscosity relative to pure water. A 10 Wt% NaCl solution is about 20% more viscous than pure water. A 10 Wt% HCl solution is about 10% more viscous than pure water. Relative viscosity...
  12. stevethermo

    Prediction of normal paraffins in Kerosene

    ?Lacking any better method, you may be able to do some screening to reduce the number of possible feeds, using data that would usually be available, such as the density and the cloud point or pour point. If a MW or boiling point curve is also available, the Watson K factor (or UOP K)with the...

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