Experiment One: Single Component Study Using PVT Simulator
DR. Ebrahim Fathi
PNGE 332
Name: Hamad Alqahtani
Date: 14 September 2017
Cover Letter:
Dear Dr. Ebrahim Fathi,
I conducted a single-component experiment on 31Augest 2017 using the PVT simulator. A PVT simulator is used to analyze the phase behavior of fluids. Phase behavior is used to describe the phases in which a mass of fluid exists in a particular pressure, volume, and temperature (PVT) condition. The purpose of the experiment was to find the bubble point and the dew point of carbon (IV) oxide in different temperatures. In this experiment, they were tested at four different temperatures.
A PVT simulator works by calculating the pressure in psia. Both the volume of the gas and that of the liquid are calculated by this component in cc, in the visual cell. To find the bubble point, mercury is added; and to find the dew point, mercury is removed. The bubble point is when the first gas bubble starts to appear in the cell. The dew point is the last drop of liquid found in the cell when all the liquid has been removed.
At the start of the experiment, the pressure and the volumes of the gas and that of the liquid are always at different points. The temperature of the environment also differs depending on the number of trials that one conducts.
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After opening the valves, the attached measurement read an initial pressure of 2,000 psi. Mercury was then removed with the use of the hand pump until gas started to form. A reading of 0.002 cc in the yellow measurement indicated the gas. This data was collected to be the bubble point. Removal of mercury then continued until the last drop of liquid. At the reading of 0.002 cc, a brown measurement appeared. This was collected to be the dew point of carbon (IV) oxide. This procedure was repeated for trials G1, G3, G5, and G10.The figure below is similar to the one loaded on the screen in every
When the liquid level is above the calibration line on the pipette, remove the bulb quickly and put your thumb or index finger over the pipette. Carefully “roll” finger to the side and allow the liquid to drop until the meniscus is level with the mark. Then hold the pipette over the flask to receive the liquid and remove the finger. Allow the liquid to drain out.
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... error that may be present is inconsistent temperatures. In each of these trials temperature was never measured to make sure the number was actually 21°C. This temperature discrepancy could lead to inaccuracies in finding the mean density.
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Third, the liquid will enter to the expansion valve with the higher pressure and leaves with the low pressure.