Page 341 - Petroleum and Gas Field Processing

amount of free water in the gas after its compression and

cooling (1500 psia and 110 F).
(ii) Why is it necessary to compress and cool the gas before the
dehydration process?
(iii) Determine the required diameter of the glycol contactor using
C D ¼ 0.852 and d m ¼ 120 mm.
(iv) Determine the required glycol circulation rate in gallons per
minute and the reboiler duty assuming the lean glycol
concentration to be 98.5%.
(v) Discuss the limitations on the temperatures of the glycol and
gas.
(vi) Draw the process flow diagram of the solid desiccant
dehydration process used for polishing the gas.
(vii) Determine the volume of the desiccant needed and the diameter
and height of the absorber given that the maximum superficial
velocity allowed in the tower is 40 ft/min and using a cycle
time of 8 h.

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