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  1. cherry123

    capacity enhancement of distillation column

    First carry out hydraulic run for the internals. Check for % flooding. You may need to change the internals of the column in case of excessive flooding.
  2. cherry123

    Bubble point and dew point temperature

    At bubble point the liquid starts to boil so there is no change of temperature, at the dew point the vapors starts to condense. But why is the bubble point temperature differs from the dew point temperature. When phase changes there is no change of temperature but why is there a difference...
  3. cherry123

    Size of catalyst

    MMA DMA and TMA all are reversable reactions, it is impossible to have only DMA. They are all parellel reactions, it is possible to supress the formation of MMA and TMA by keeping there concentration high in the reactor, so that DMA formation is favoured that is why after separation of DMA using...
  4. cherry123

    Size of catalyst

    Yes I know the space velocity of methanol in WHSV. But since I am recycling now so would it make any difference? or same size of catalyst can be used?
  5. cherry123

    Size of catalyst

    Does the size of the reactor (catalyst weight) needs to be changed if we want to change the feed. Initially only fresh reactants were charged but now since the products forms not only the desired product but also undesired products as well, so I want to recycle back the undesired products but...
  6. cherry123

    Calculate Noise level and wearing of PCV

    I want to calculate noise level and wearing of PCV with a nominal pipe dia of 2 in, valve size is 1 in and valve body is 0.375 in. The process conditions are: Pressure: 50Psig Drop through valve: 15 psi Flow: 310 lb/hr Mol. Wt.: 57 Temp: 250 F Please provide me the details to check this valve...
  7. cherry123

    What is the difference between Jp4 and Jp8

    Hi, I need to know about JP4 and JP8 fuels. They both are made by blending of kero with additives. Which one is economically better?
  8. cherry123

    How much critical is molecular weight for pressure control valve

    I want to know how a PCV (Pressure control valve) works. Only pressure matters regardless of flow? or the flow as well as gas density also matters?
  9. cherry123

    Specific Gravity for gases

    I have a case in which I know specific gr. (std conditions) of gas is 1.87 I know the density of gas at 100 Psig = 0.67 lb/ft3 Density of air at STP is = 0.0749 lb/ft3 So, actual specific gr. is = 0.67/0.0749 = 8.94 The gas is so heavy!
  10. cherry123

    Specific Gravity for gases

    I want to know how can we express specific gravity for gases at actual conditions. Is it density of gas/density of air at STP or Is it density of gas/density of air at that pressure and temperature Please clarify.

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