Dear All,
We are experiencing condensate dropout in our natural gas fuel lines. Natural gas is supplied at 15 barg and its pressure is reduced in two stages to 5 bar and 1 bar respectively. There is a knockout drum after first pressure reduction. Condensate does not collect in the knockout, but in the final Fuel header (at its end point).
What are the possible causes of condensate dropout. The collected condensate is Black in color with API gravity 30-35 degrees. When heated in the laboratory the whole condensate evaporated at 500 degC.
If it is to say that condensate has been dropped out due to the achievement of Hydrocarbon Dew Point then how is it possible that a temperature decrease of 5-10 degrees leads to a drop out of a condensate which gets vaporized at 500 deg C?
C6+ content in the natural gas is 0.71-1.02.